Explore a map

First, you'll open a web map and learn how to navigate and work with it using map tools as you explore volcanoes and the risk of lava flow on the island of Hawaii.

Open the map

You'll start by opening a map of lava flow hazard zones on the island of Hawaii.

  1. Go to the ArcGIS Online group Get Started with Map Viewer.

    A group is a collection of content on ArcGIS Online. This group contains the data for these lessons.

  2. Click the thumbnail of the Hawaii Island Lava Flow Risk map by Learn_ArcGIS to open it. (If you click the link instead of the thumbnail, the lesson will open to the details page. If that happens, click Open in Map Viewer.)

    Hawaii Island Lava Flow Risk thumbnail

    The map opens to show the island of Hawaii. Instead of beaches and greenery, you see a geologic classification of the island into lava flow hazard zones of different severity. The map also shows volcanoes, emergency shelters, and highways.

    Hawaii Lava Flow Risk map

Explore the map

The map contains layers, and layers contain features. For example, each volcano is a feature in the Volcanoes layer. In this section, you'll get information about features and navigate the map.

  1. Click a volcano on the map, such as Mauna Loa.

    Mauna Loa pop-up

    Mauna Loa, which last erupted in 1984, is one of three active volcanoes on the island. (Mauna Kea is extinct.)

  2. Click the thumbnail image on the pop-up.

    A large, captioned version of the image opens in a new browser tab or window.

  3. Close the tab or window with the detailed image.
  4. At the bottom of the pop-up, click Zoom to.

    The map zooms in on the feature and you can see the terrain.

  5. Close the pop-up by clicking the X in its title bar.
  6. Click the Default extent button in the upper left corner of the map.

    Default extent button

  7. Click a lava flow hazard zone.

    Mauna Loa Rift Zone pop-up

    Another pop-up opens with information about the feature and a thumbnail image that links to a larger picture.

  8. Click the thumbnail image on the pop-up to see the large, captioned image.
  9. Close the browser tab with the detailed image and close the pop-up on the map.
  10. On your own, learn more about the volcanoes, hazard zones, and emergency shelters. Use the map navigation tools or your mouse wheel to zoom in and out.
    Tip:

    Press the Shift key and draw a box on the map to zoom in on a particular area.

  11. When you're finished, click the Default extent button to return to a full view of the island.

Now that you know something about how the map works, you'll look at how it's put together.

View the map contents

To work directly with the map layers, you need to switch to the Contents view of the map.

  1. At the top of the Details pane on the left, click the Content button.

    Map contents

    The order of layers on the Contents pane is the order in which they are drawn on the map. At the bottom, every map has a basemap layer that covers the entire world. Every layer, except the basemap, can be turned on or off.

  2. On the Contents pane, check the box next to the Lava Flow Hazard Zones layer to turn the layer off.

    View of the terrain layer

    You see the Terrain layer underneath. (The Terrain layer was already partially visible because of a transparency setting on the Lava Flow Hazard Zones layer.)

  3. Turn off the Terrain layer to see the Topographic basemap.
  4. Turn both layers back on.

    You can adjust the transparency of any layer.

  5. In the Contents pane, point to the Lava Flow Hazard Zones layer. Click the More Options button and choose Transparency.

    Transparency

    The layer is approximately 40 percent transparent.

  6. Move the Transparency slider back and forth.

    When the layer is completely opaque, the terrain is obscured. At the other extreme, the Lava Flow Hazard Zones layer is invisible.

  7. Move the Transparency slider to a position you like. Move the mouse pointer over some white space on the Contents pane, and click if necessary, to close the layer properties.

Now that you've explored the map, you'll assemble it in the next lesson.

Use map tools

You can also work with the map using tools on the ribbon.

  1. On the ribbon, click the Measure button and click the Distance tool.

    Find area, length, or location

  2. On the map, click Mauna Loa to start a measurement.
  3. Move the mouse pointer to another volcano, such as Hualalai, and double-click to end the measurement.

    Measurement result

  4. Make a few more measurements. When you're finished, close the Find area, length, or location box.
    Tip:

    During a measurement, click once to change the direction of the line.

  5. On the ribbon, click the Basemap button to open the Basemap Gallery. Click Oceans or another basemap.

    Basemap gallery

    The new basemap is shown.

    Ocean basemap

  6. Change the basemap back to the Topographic basemap.

You've explored a map that somebody else had already made and became familiar with its layers and data. Next, you'll use similar data to create your own map of Hawaii and its lava flow zones.


Create a map

Every new map starts with a basemap. In an ArcGIS organization, the administrator chooses the default basemap and sets its extent. This lesson assumes that your default basemap is the Topographic basemap and that its default extent is the world. If your settings are different, you'll make changes as needed in the first section.

Create a new map

  1. If a map is already open in your browser, click Modify Map in the upper right corner of the page. Then, click New Map and choose Create New Map. In the Open map window, click Yes, Open the Map.
  2. If a map is not open in your browser, go to ArcGIS Online and click Map at the top of the page.
    Tip:

    If you're in a new session, clicking Map will open a new map. Otherwise, it will open an existing map (the last map you were using). If an existing map opens, click New Map, and choose Create New Map.

    The new map opens to the extent of the world. (Your extent could differ depending on your administrative settings.)

    A map of the world

  3. On the ribbon, in the Find address or place box, type Island of Hawaii. In the list of suggested locations, choose Island of Hawai'i, United States.

    Search box

    The map zooms to Hawaii.

    Island of Hawaii

  4. Close the Search result pop-up.
  5. Zoom in on the island. If necessary, pan (drag) the map to center Hawaii in the view.

    Hawaii centered in map view

    If you save the map, the map extent at the time of saving will become the extent used by the Default extent button. It can also be useful to add spatial bookmarks to navigate to particular map locations.

  6. In the upper right corner, click Modify Map. (If you're already signed in, skip this step.)
  7. On the ribbon, click the Bookmarks button. In the Bookmarked places list, click Add Bookmark.
  8. Type Island of Hawaii and press Enter.

    Island of Hawaii bookmark

  9. Close the list of bookmarked places.
  10. At the top of the Details pane, click the Content button.

    Contents pane

  11. If necessary, click the Basemap button on the ribbon and choose Topographic.

Add layers to the map

You're ready to start adding layers to the basemap.

  1. On the ribbon, click the Add button and choose Search for Layers.

    Search for Layers option

    A default list of search results appears.

  2. If necessary, click the drop-down arrow at the top of the pane and choose ArcGIS Online.
  3. In the search box, type Hawaii. To limit the search results to layers owned by the Learn ArcGIS administrator account, add owner:Learn_ArcGIS and press Enter.

    Find Hawaii in Search for Layers

    The search results are narrowed to a more relevant list.

  4. In the list of results, locate HawaiiTerrain by Learn_ArcGIS. Click Add to add the layer to the map.

    Search results

  5. In the same way, add the following layers from the search results to the map (all layers are by Learn_ArcGIS):
    • Volcanoes
    • Hawaii Lava Flow Hazard Zones
    • Hawaii Island Major Highways
  6. At the top of the search pane, click the Back button.

    Map with layers

    The layers are drawn, with their default symbols, in the order in which they were loaded into the map. (This is usually, but not always, the same order in which you add them.) You don't see the volcanoes on the map because they are underneath the lava flow hazard zones.

Set layer properties

In this section, you'll change some of the properties of the layers. You'll give them shorter names, change their position in the list of layers, add labels, and adjust transparency. Layer properties are always accessed in the same way: by pointing to the layer name and clicking an appropriate button or clicking the More Options button and choosing the property you want to change.

  1. In the Contents pane, point to the Hawaii Island Major Highways layer. Click the More Options button and choose Rename.

    Rename highways

  2. In the Rename window, change the layer name to Highways and click OK.

    Rename window

  3. In the same way, rename the Hawaii Lava Flow Hazard Zones layer to Lava Flow Hazard Zones.
  4. Rename the HawaiiTerrain layer to Terrain.
  5. In the Contents pane, point to the Volcanoes layer. Click the More Options button and click Move up.

    Volcanoes layer move up

    The layer moves up one position, above the Lava Flow Hazard Zones layer. The volcanoes are now visible on the map.

  6. Move the Volcanoes layer up again.

    Now the Volcanoes layer is at the top of the list. The usual practice is to put points (such as volcanoes) above lines, and lines (such as highways) above polygons. Points, lines, and polygons are all feature layers: they usually represent discrete geographic objects that have more or less precise locations and boundaries.

    The Terrain layer, like the Topographic basemap, is a tile layer. Tile layers are images and cannot be manipulated in the same ways as feature layers. They typically represent large, continuous surfaces rather than discrete objects. Tile layers cannot be moved above feature layers in a map.

  7. In the Contents pane, point to the Volcanoes layer. Click the More Options button and choose Create Labels.

    Each volcano is labeled with its name.

  8. In the Label Features pane, change the label size from 13 to 14 and click OK.

    Label Features pane

  9. Open the properties for the Lava Flow Hazard Zones layer and choose Transparency. Make the layer about 40 percent transparent, or whatever looks good to you.
  10. In the same way, make the Highways layer about 50 percent transparent.

    Map with layer property settings

    You have re-created the appearance of the map you explored in the last lesson, except for the emergency shelters.

Define the map legend

When you start a new map, or open a saved map of your own, it opens with the Contents pane showing. When anyone else opens your map, however, it opens with the Legend pane showing. You should think about how you want the legend to look.

  1. At the top of the Contents pane, click the Legend button.

    Legend entries are created for all layers except the basemap. The entry for the Terrain layer (which shows grayscale values) is not useful for interpreting the map.

  2. At the top of the Legend pane, click the Content button.
  3. Open the properties for the Terrain layer and choose Hide in Legend.
  4. View the legend again to see the effect, and then go back to the Contents pane.

Change a symbol

You were able to re-create the map's appearance without too much effort because the symbols, such as yellow diamonds for volcanoes and shades of red and orange for hazard zones, were already set when you added the layers. A layer's default display settings, including its style and pop-up configuration, are made by its owner. Once you add a layer to your own map, however, you're free to change those settings.

  1. In the Contents pane, point to the Highways layer and click the Change Style button.

    Change Style button

    In the Change Style pane, the currently selected style is Location (Single symbol), which is indicated by the check mark.

    Change Style pane

    In this style, all features in the layer are drawn with the same symbol. The Location style is appropriate when you want to see the features on the map but you're not interested in their particular characteristics, such as names or speed limits.

  2. For a drawing style, under Location (Single symbol), click Options.
  3. Under Showing Location Only, click Symbols to change the symbol.
  4. On the color palette, choose a color that you think will look good and click OK.

    Color palette

    The new color is applied to the map. (If you don't like it, click Symbols again to open the color palette and choose a different color.)

  5. At the bottom of the Change Style pane, click OK and click Done.
    Caution:

    Remember that you haven't saved your work for this lesson. If you're continuing to the next lesson, be sure to keep the map open.

You've almost re-created the appearance of the map you explored in the first lesson. Next, you'll add a layer of emergency shelters from a CSV file.


Add a layer from a CSV file

Previously, you became familiar with the locations of volcanoes and high-hazard lava flow zones on the island of Hawaii. For planning purposes, it might be useful to know where these areas are in relation to highways (which are already on your map) and emergency shelters (which are not).

A lot of information that is potentially spatial in nature is locked away in spreadsheets and text files. If this information is properly formatted, it can be added to ArcGIS and turned into map layers. All you need are well-defined street addresses or pairs of latitude-longitude coordinates.

Download and view a CSV file

Next, you'll add a CSV file of emergency shelter addresses to your map. A CSV (comma-separated values) file stores table data in a plain text format. It's an import/export format commonly supported by spreadsheet and database applications.

  1. Go to the Get Started with Map Viewer group.
    Caution:

    If you didn't create an ArcGIS organizational account to save your work in the previous lesson, be sure to keep your map open. If you close your map, you may lose your work.

  2. Click the Hawaii Emergency Shelters CSV thumbnail.

    Hawaii Emergency Shelters CSV thumbnail

    Depending on your browser, the CSV file may appear on your downloads bar or you may be prompted to open or save the file.

  3. Open the file with your default application for opening CSV files, such as Microsoft Excel.
  4. If necessary, widen the columns by dragging or double-clicking their edges.

    Widen columns by edges

    Each row in the table represents an emergency shelter. (On the island of Hawaii, most shelters are schools.) The address columns allow the table to be interpreted as spatial data.

    If you're viewing the file in a text editor, you'll see the same information formatted as text separated by commas. ArcGIS will accept it either way.

    CSV as text file

  5. In the application in which the CSV file is open, click the File menu and choose Save As. Save the file as EmergencyShelters.csv to a location on your computer.
  6. If the file is open in Microsoft Excel, you'll be prompted whether you want to keep the workbook in CSV format. Click Yes.
  7. Close the application in which the CSV file is open. (If you're prompted to save changes again, click Don't Save.)

Add the CSV file as a layer

You can get CSV files from many other public servers or convert them from other file types. You can also make them by copying and pasting information from web pages or other sources.

  1. Return to the browser window with your Hawaii map. (If you created an account and saved your map, open your map from the My Content tab of the content page.)
  2. On the ribbon, click the Add button and choose Add Layer from File.

    Add Layer from File

  3. In the Add Layer from File window, click Choose File (or your browser's equivalent command). Browse to the location where you saved EmergencyShelters.csv.
  4. Click the file to select it and click Open.
  5. In the Add Layer from File window, click Import Layer.
    Tip:

    You can also drag a CSV file directly into a web map from your computer.

    When you add a CSV file with location information (street addresses or coordinates), the features are located on the map. If you add a CSV file that doesn't contain location information, a table is added instead. In this case, the file is recognized as containing street addresses.

    In the table, the Field Name column lists the field names (column headings) from the CSV file. In the Location Fields column, these field names are matched to appropriate categories of address information for the specified country. The ADDRESS field, for example, is correctly interpreted as containing street addresses. The CITY field is correctly interpreted as containing city names.

  6. Scroll to the bottom of the window to confirm all the field names are being interpreted correctly.

    List of field names and location fields

    Tip:

    Your CSV file may contain street addresses stored under field names that ArcGIS doesn't recognize as address fields. You can apply the interpretation yourself by clicking the Location Field value next to the field name and choosing the appropriate location information from a drop-down list.

  7. Click Add Layer.

    Emergency shelter points on map

    On the map, a point symbol is drawn at the address of each shelter. (As you can see from the legend, most or all of the shelters are schools.) By default, the points are assigned unique colors on the basis of name. Other drawing options are shown in the Change Style pane.

    For this map, the individual names aren't important. You're interested in the shelters as shelters, so you want to give them all the same symbol.

  8. In the Change Style pane, under Select a drawing style, click Select for the Location (Single symbol) style.

    Location (Single symbol) drawing style

    In the Change Style pane, the Location (Single symbol) style now has a check mark to show that it's selected. On the map, the shelters are drawn with a single symbol.

    Shelters with single symbol

    In the next section, you'll apply a different symbol that more specifically represents emergency shelters, but this symbol will do for the moment.

  9. At the bottom of the Change Style pane, click Done.
  10. In the Contents pane, point to the Emergency Shelters layer. Click the More Options button and choose Rename. Rename it Emergency Shelters with a space between the words.

Symbolize the shelters

You'll change the default symbol to something that better represents emergency shelters.

  1. In the Contents pane, point to the Emergency Shelters layer and click the Change Style button.

    In the Change Style pane, the currently selected drawing style is Location (Single symbol). This is the style you selected in the last section.

  2. Click Options for the Location (Single symbol) drawing style.

    Location (Single symbol)

  3. Under Showing Location Only, click Symbols to change the symbol.

    A symbol palette opens, showing a variety of symbols that belong to the default Shapes category of symbols. ArcGIS also has many other symbol categories.

  4. Click the arrow next to Shapes and choose the National Park Service category.
  5. In the National Park Service category, find the symbol with a white cross on a black background and click it to select it.
  6. Change the symbol size to 12 px (pixels) and click OK.

    Select new symbol

    The symbols are updated on the map.

    Map with new shelter symbology

  7. In the Change Style pane, click OK and click Done.

    The new symbols are intuitively recognizable as emergency shelters. Their strong black and white colors help them stand out from the reds and oranges of the hazard zones.

    Caution:

    Remember that you haven't saved your work for this lesson. If you're continuing to the next lesson, be sure to keep the map open.

You've added a layer of emergency shelters from a CSV file. When you explored the Hawaii Lava Flow Risk map in the first lesson, you began by opening pop-ups for the volcanoes and lava flow hazard zones. Configuring pop-ups to present useful information is an important part of making good maps. Next, you'll configure the pop-ups.


Configure pop-ups

Previously, you worked with many different layer properties. An important layer property that you haven't worked with is pop-up configuration. With pop-ups, you can provide relevant and contextual information for your data.

Configure emergency shelter pop-ups

In the first lesson, the pop-ups for the Volcanoes and Lava Flow Hazard Zones layers were prepared for you. Next, you'll see how those configurations were done. You'll start, however, by working on the pop-ups for the Emergency Shelters layer.

  1. If necessary, open your Hawaii map.
  2. Click a shelter to open its pop-up.

    Emergency shelter pop-up

    The basic configuration of a pop-up is just what you see: a list of fields and values. The information should be familiar to you because it comes straight from the CSV file. Most pop-ups are essentially stylized views of a table of attributes associated with a layer.

    In this case, the default configuration has a few minor problems. For example, the shelter name appears twice: first as the pop-up title, and again in the list of fields. Also, it's probably unnecessary to show the state name—anyone using the map will know that this is Hawaii.

  3. Close the pop-up.
  4. In the Contents pane, point to the Emergency Shelters layer. Click the More Options button and choose Configure Pop-up.

    The default pop-up title is a field name, usually the NAME field, in curly brackets. Field names in curly brackets work like variables: when you click a shelter on the map, you see the name of that particular shelter.

    Pop-up title

    Under the Pop-up Contents heading, the display is set to a list of field attributes. This setting defines the list format that you saw in the pop-up.

  5. Under the list of attributes, click Configure Attributes.

    Configure Attributes

    In the Configure Attributes window, attributes are listed by their display status (on or off), field name, and field alias.

  6. In the Display column, uncheck the box for the {NAME} field.

    Box for name field

  7. Uncheck the Display box for the {STATE} field as well.
  8. Click OK.
  9. At the bottom of the Configure Pop-up pane, click OK.
  10. Click an emergency shelter on the map to see its new pop-up.

    Emergency shelter pop-up

    The fields that you unchecked in the Configure Attributes window no longer display in the pop-up.

  11. Close the pop-up.

Explore pop-ups for other layers

You'll look again at pop-ups for the other layers in the map.

  1. Click a lava flow hazard zone on the map to open its pop-up.

    Lava flow hazard zone pop-up

    The pop-ups for this layer are configured just as they were in the map you explored in the first lesson. The layer owner has saved this configuration as a default property of the layer. You don't need to do anything with it.

  2. Click a highway.

    Pop-ups for the Highways layer have been turned off. You can open pop-ups for lava flow hazard zones underneath highways, but not for highways themselves.

  3. In the Contents pane, point to the Highways layer. Click the More Options button and choose Enable Pop-up.
  4. Click a highway again.

    Highway pop-up

    The pop-up isn't nicely configured. You could spend some time improving it, but it's not necessary. Map layers that are used for general reference or background may be better off without pop-ups.

  5. Close the pop-up.
  6. In the Contents pane, point to the Highways layer. Click the More Options button and choose Remove Pop-up.
  7. Click a volcano feature on the map to open its pop-up.

    Volcano pop-up default

    The Volcanoes layer doesn't have the same nice configuration you saw in the first lesson. That configuration was saved in the map, but it was not saved as a default property of the layer. So now you see the more typical list of fields and values. It will take some effort on your part to make the pop-up look good again.

    With the Emergency Shelters layer, you saw that the information in the pop-up came directly from the CSV file. The same is true for other layers: their pop-ups are formatted presentations of table data.

  8. In the Contents pane, point to the Volcanoes layer and click the Show Table button.

    Show Table button

    The information in the table matches the information in the pop-up.

    Volcanoes table

    In the table, two of the fields have URLs as values. URLs enable pop-ups to display images and other web resources. In the default pop-up configuration, these URLs are represented by More info links.

  9. Close the table by clicking the X in the upper right corner.

Configure volcano pop-ups

Configuring pop-ups is the process of specifying which information from a layer's table is shown in the pop-up and how that information is displayed. Part of this process involves formatting attribute names and values. Part of it involves choosing a pop-up style: information can appear in a list, for example, or in a customized paragraph form. The final part involves enhancing the pop-up with images, charts, and links.

  1. In the Contents pane, point to the Volcanoes layer. Click the More Options button and choose Configure Pop-up.
  2. In the Pop-up Title box, delete the text up to the {NAME} field.

    Pop-up title

    The title will now show only the volcano name, not the layer name as well.

  3. In the Pop-up Contents section, keep the display set to A list of field attributes. Below the list of attributes, click Configure Attributes.

    Configure attributes

  4. In the Configure Attributes window, uncheck the Display boxes for the following fields:
    • {NAME}
    • {VolcanoPicture}
    • {VolcanoThumb}
    • {PhotoCredit}

    The {NAME} field doesn't need to be displayed because it's already used in the pop-up title. The other three fields will be used in the Pop-up Media section. Only the {ELEVATION}, {TYPE}, and {Last_eruption} fields should be checked to display.

    Update fields

  5. In the Field Alias column, click ELEVATION to make the text editable. Replace it with Elevation (m).
  6. On the right side of the window, change Format to 0 decimal places.

    New elevation alias

    An alias is a display name that replaces the field name in the pop-up. By default, the alias and field names match, but you can change the alias to something more informative or familiar. In this example, the parenthetical "m" means that the values are in meters. (This may not be self-explanatory, and you can use a more descriptive alias if you want.)

  7. In the Field Alias column, click TYPE. Replace it with Type and press Enter.
  8. Again in the Field Alias column, scroll down and click Last_eruption. Replace it with Last eruption and press Enter.

    Field aliases complete

    Changing case and replacing underscores with spaces are small improvements to the pop-up display.

  9. Click OK.

    Now you'll configure the thumbnail image to display in the pop-up window and link to the large captioned image.

  10. In the Configure Pop-up pane, under Pop-up Media, click Add and choose Image.

    Add image pop-up

  11. In the Configure Image window, delete the default title (Image 1). Type Photo: in its place, and press Spacebar.
  12. To the right of the Title box, click the Add Field Name button. In the list of fields, scroll down and choose PhotoCredit {PhotoCredit}.

    Add field name

    Remember that field names work like variables. In the media part of each pop-up, the correct photographer's name will appear.

    Photo credit

    Note:

    When you use the Add Field Name button, the list shows both the field name and its alias. When these are the same, as they are by default, you see entries such as PhotoCredit {PhotoCredit}.

  13. In the Caption box, type Click image to learn more.
  14. To the right of the URL box, click the Add Field Name button. In the list of fields, scroll down and choose Volcano_Thumb {Volcano_Thumb}.

    The URL box must contain paths to images that are stored on a publicly accessible server, such as your account on a photo-sharing site. These images will be displayed in the pop-up and, when clicked, will open the items referenced in the Link box.

  15. To the right of the Link box, click the Add Field Name button. Scroll down and choose VolcanoPicture {VolcanoPicture}.

    Configure image window

    Unlike the URL box, the Link box doesn't have to refer to images, although it does in this case. It can go to web pages, PDFs, or any resource with a URL.

  16. Click OK.
  17. At the bottom of the Configure Pop-up pane, click OK.
  18. Click a volcano on the map.

    Kilauea pop-up

    The pop-up reflects your configuration. (Some text formatting, along with the horizontal separator lines, is applied automatically.)

  19. Click the thumbnail image to test the link, and then close the browser tab or window with the large picture.
  20. Open pop-ups for some other volcanoes.
  21. When you’re finished, close any browser tabs or windows with large volcano pictures. Close the open pop-up on the map.
  22. On the ribbon, click the Bookmarks button and click the Island of Hawaii bookmark.
    Caution:

    Remember that you haven't saved your work for this lesson. If you're continuing to the next lesson, be sure to keep the map open.

Your map is complete. Next, you'll acquire an ArcGIS organizational or public account and publish your map as a web mapping app. A web app allows you to customize the appearance and functionality of your map to create an elegant user experience.


Make an app

You can add value to your map by publishing it as a web app. A web app is a customized user interface that enhances your map's appearance, adds (or removes) functionality, and helps you integrate the map with other media. You can choose from several predefined configurable templates, or use Web AppBuilder for ArcGIS to design your own.

Next, you'll publish your lava flow risk zone map in the Map Styler template. This web app allows you to choose color schemes, add descriptive text, and decide which map tools you want to make available to users. To create a web app, you'll need either an ArcGIS organizational account or a public account to save and share your map. You can sign up for a free trial account if you do not have one.

Save the map

You'll begin by saving your map.

  1. If you do not have an account, sign up for a free ArcGIS trial account.
  2. Return to the browser window with your Hawaii map.
  3. On the ribbon, click the Save button and choose Save.
  4. If necessary, sign in to your ArcGIS account.
  5. In the Save Map window, type Hawaii Island Lava Flow Hazard Zones in the Title box.
  6. For the tags, type words that will help people find the map through searches. After each tag, press Enter.
  7. For the summary, type a brief description of the map's content.

    Save Map window

  8. Click Save Map.

    The map is saved to My Content, which you can access from the content page in the organization.

Edit item details

Next, you'll edit the information that describes your map (also known as its metadata). The metadata changes you make to your map will carry over to your web app. In particular, you'll edit your map's Description, which will allow users to learn about the map's content.

  1. In the upper left corner of the page, click Home and choose Content.

    On the My Content tab of the content page, the map is listed by its name and other details.

  2. Click the map title to view its item details.

    Map title in My Content

    The item page contains information about your map. From this page, you can also share the map, monitor map usage to gauge its popularity, and edit settings such as the map extent.

  3. On the item page, for Description, click Edit.
    Note:

    You can also edit by clicking the blue text below the heading.

  4. In the Edit Description box, type (or copy and paste) the following text: The classification of lava flow hazard zones on the island of Hawaii was made by the United States Geological Survey in 1974. The risk levels are based on the location and frequency of historic eruptions.
    Tip:

    If you copy and paste the text, it may be formatted in the description box. You can remove the formatting by highlighting the text and clicking the Remove Format button on the Description toolbar.

  5. Click Save.

    Your map's item details are updated.

Save the shelters as a layer

The Emergency Shelters layer exists in your map but nowhere else. Nobody would be able to find it, for instance, by searching the organization's layers. By saving it as a layer to My Content, you can share it and add it to other maps. You'll be its owner, and the properties you give it will be its defaults. When someone else adds the layer to a map (assuming you share it), it will display with the symbology you chose.

  1. Near the top of the item page, click Open in Map Viewer.
  2. Open the properties for the Emergency Shelters layer and choose Save Layer at the bottom of the menu.
    Note:

    This menu choice is only available for layers that you've created. You won't see it in the properties for other layers in this map. (If you're an administrator of the organization that owns the content, you'll also see this menu choice.)

  3. In the Create Item window, keep the title Emergency Shelters.
  4. Add a few tags that will help people find the map through searches. After each tag, press Enter.
  5. Add a summary of the layer's content.

    Create Item window

  6. Click Create Item.
  7. Save the map.
  8. In the upper left corner of the page, click Home and choose Content.

    Emergency Shelters layer

    The layer appears as an item in My Content.

Create a web app

Now, you'll create your web app. The first step is to share your map so others can see it.

  1. Open the map. On the ribbon above the map, click the Share button.

    Share button

  2. In the Share window, check the box to share the item with your organization—or, if you want, share it with everyone.

    Share window

    Tip:

    If you want to share the map through social media accounts such as Facebook or Twitter, share it with everyone.

    When you share the map, the Update Sharing window appears, which indicates that the Emergency Shelters layer that you own may not be visible to others because it is not shared in the same way as the map.

  3. Click Update Sharing to adjust the settings of the listed layer so it can be viewed in the web map.

    Now that the map is shared, you'll make the web app.

  4. In the Share window, click Create a Web App.

    Create a Web App button

    The Create a New Web App window appears, presenting a gallery view of the available templates. Some are designed for specific purposes; others are for general use.

    The templates are in alphabetical order. You can use the scroll bar to review the full gallery, or you can filter the templates by using the tabs on the left or the Search box at the top.

  5. On the left, click Showcase a Map.

    Filtered gallery of templates

    Note:

    If your organization has configured custom galleries, you may not see these same configurable apps.

  6. Click the Map Styler template, and then click Create Web App.
  7. In the Create a New Web App window, accept the default title and tags.

    It won't be a problem that the web app has the same title as the map it's based on, because the two items are of different types.

  8. For the summary, type a brief description of the app.

    Create a New Web App window

    By default, the web app is given the same sharing properties as the web map.

  9. Click Done.

    The Configure window appears with a preview of the app.

    Configure window

Configure the app

You can change the web app's configurable properties using the tabs in the Configure window. Some of these properties, such as the title, theme, and text color, have default settings. In this section, you'll make changes to some of these settings.

  1. Click the General tab.

    By default, the web app title is the same as its source map.

  2. Leave the default setting for the title, or type a new title of your own.
    Note:

    If you type a new title, it will display when users open the web app. The title of the web app item in My Content, however, will remain Hawaii Island Lava Flow Hazard Zones (the title you accepted when you published the web app in the last section).

    The About panel gives a short description of the map. This text comes from the item summary you created for the web map. You can override this text.

  3. Uncheck the Add item summary to the About panel box and copy and paste the following text into the About box:

    The boundaries and classification of lava flow hazard zones on Hawaii Island were first mapped by the U.S. Geological Survey in 1974. This classification scheme divides the island into 18 major zones that are ranked from 1 through 9 based on the probability of coverage by lava flows. The risk levels are based primarily on the location and frequency of historic eruptions (those for which there are written records or that are known from the oral traditions of the Hawaiians) and the geologic mapping and scientific dating of the old flows from prehistoric eruptions.

  4. In the About box, press Enter twice to add a blank line, and type (or copy and paste) Click a hazard zone or volcano to learn more.
  5. Highlight the sentence you just typed. On the toolbar at the top of the About box, click the Italic button to italicize the sentence. Click some white space to deselect the text.

    About box

  6. In the first line of text, highlight the word classification. On the toolbar, click the Create Link button.

    Create Link button

  7. In the Link Properties box, copy and paste https://pubs.er.usgs.gov/publication/7000036 into the URL text box. Click the arrow next to Target and choose New Window. Click Set.

    Link Properties

    This link will take the user to a United States Geological Survey page that describes the hazard zones in more detail.

  8. Click the Search tab.

    The purpose of your web app is to inform people about volcanoes and areas of lava flow risk. They probably don’t need to look for specific addresses or places on the map. You'll disable the search options.

  9. Uncheck the Enable ArcGIS World Geocoding Service box and the Find places box.
  10. Click the Theme tab. For Preset Colors, choose a theme color.

    Preset color

    You can choose any color. The theme color will be used as the background color for the web app title.

  11. Click Save.

    The preview of your configured web app updates to show your changes. The About panel takes up a lot of space on the map, and the legend is hidden. You'll change the layout so the legend appears when you first open the app.

  12. Click the Layout tab and select Legend as the startup panel.

    Legend selected for startup panel

  13. Click Save.

    Configured web app

  14. At the bottom of the Configure window, click Close.

    You're taken to the web app's item page.

Edit the app's item details

The item title, summary, and tags are already completed from when you created the web app. You still need to add a description and some other information.

  1. On the item page, next to Description, click Edit.
  2. In the Edit Description box, type a description of the web app, for example:

    Lava flow hazard zones for the island of Hawaii as defined by the U.S. Geological Survey. Volcanoes, emergency shelters, and major highways are also shown.

  3. Click Save.
  4. For Terms of Use, click Edit and type None. Public domain data and images. Click Save.
  5. In the lower right of the page, for Credits (Attribution), click Edit and type Hawaii State GIS Program; United States Geological Survey.
  6. Click Save.
    Tip:

    If you later decide to make changes to the way the web app is configured, open this item page and click Configure App.

View the app

Next, you'll explore the app you created.

  1. At the top of the item page, click the thumbnail image to open the application. (You can also click View Application.)
  2. Explore the app by navigating and opening pop-ups.

    Hazard zone pop-up

    The pop-ups behave the same in the web app as they do in the web map.

  3. Click the Default extent button to return to the original view of the map.

    Default extent button

    Note:

    Any changes you make to the source web map, such as adding or removing layers, changing symbology, or configuring pop-ups, will be reflected automatically in the app. If you change the sharing properties of the map (or if you delete it), this will affect the app as well.

Make a thumbnail image

The last thing to do is replace the default generic thumbnail image in the item details with one that shows your app.

  1. Capture an image of the app with your image editing software.
    Tip:

    If you're not sure how to do that, capture the image with the Print Screen key (PrtScn) on your keyboard and paste it into the Windows Paint accessory. In Windows 7, you can open Paint from Start > All Programs > Accessories.

  2. Resize the image to a width of 600 pixels, but don't alter the aspect ratio.
    Tip:

    The ideal aspect ratio is 3:2. When the image width is 600 pixels, the height should be about 400 pixels. If your height value is substantially different, crop the image to avoid distortion in the thumbnail.

  3. Save the image in PNG file format to a folder on your computer.
  4. Return to the web app's item page.
  5. Above the default thumbnail image, click Edit Thumbnail.
  6. In the Upload Thumbnail window, click Choose File (or your browser's equivalent command). Browse to the folder where you saved the thumbnail and upload the image. Click OK.

    The new thumbnail image appears.

    App thumbnail image

You now know how to make a map, add layers to it, create your own layers from file-based data, configure pop-ups, and publish your map as a web app. What's next? You can try Analyze Volcano Shelter Access in Hawaii, which considers the accessibility of emergency shelters from populated areas on the island of Hawaii. You can learn how to publish map layers from ArcMap to ArcGIS Online in Homeless in the Badlands. If you'd like to delve deeper into web apps, try Get Started with Story Maps or Oso Mudslide - Before and After in which you'll create an app with Web AppBuilder.

You can find more lessons in the Learn ArcGIS Lesson Gallery.