In this lesson, you'll open a web map and add a trails layer. You'll also add layers from the Living Atlas of the World to show the terrain around the trails.
Open and save the map
First, you'll open a map of the Red Rock Canyon National Conservation Area.
- Go to the ArcGIS Online group Hiking Red Rock Canyon. When prompted,
sign in to your
ArcGIS organizational account.
If you don't have an organizational account, you can sign up for an ArcGIS free trial.
The group contains one item: a web map titled Hiking Red Rock Canyon by Learn_ArcGIS.
- Click the thumbnail to open the web map.
The map opens to the area around Las Vegas, Nevada, where Red Rock Canyon is located.
The map shows the boundaries of Red Rock Canyon set by the Bureau of Land Management (BLM). It also shows the location of the Red Rock Canyon Visitor Center, where hikers go for trail information. You'll save your own copy of the map to make changes to it.
- On the ribbon, click the Save button and choose Save As.
- In the Save Map window, in the Title box, type Red Rock Canyon Hiking Map. Leave the tags unchanged.
- For the summary, type This map was created to assist hikers in planning their day at Red Rock Canyon National Conservation Area.
- Click Save Map.
The map's name change is reflected at the top of the page. The map is saved to My Content, which you can access from the content page (from the Home menu, choose Content).
Add the trails
Next, you'll add the Red Rock Canyon Trails layer to the map.
- On the ribbon, click the Add button and choose Search for Layers.
- Click the drop-down arrow and choose ArcGIS Online.
- In the Find box, type Red Rock Canyon Trails. To limit the search results to layers owned by the Learn ArcGIS administrator account, add owner:Learn_ArcGIS. Press Enter to initiate the search.
- In the list of results, locate Red Rock Canyon Trails by Learn_ArcGIS. Click the Plus button to add the layer to the map.
- In the search pane, click the Back button to return to the content pane.
- In the Contents pane, point to the Red Rock Canyon Trails layer. Click the More Options button and choose Zoom to.
The map zooms to the extent of the layer.
The trails span much of the Red Rock Canyon National Conservation Area. Currently, the terrain and difficulty of the trails aren't apparent.
- Click the vertical ellipsis next to the Red Rock Canyon Trails layer and drag the layer below the Red Rock Canyon National Conservation Area layer.
Show the terrain
The map currently uses the National Geographic basemap. ArcGIS Online basemaps are part of the Living Atlas of the World, a collection of authoritative maps and data from Esri and thousands of other organizations. They can be used as reference data to contextualize your layers. You'll change the basemap to better show terrain.
- On the ribbon, click the Basemap button to open the Basemap Gallery. Click Terrain with Labels.
The Terrain with Labels basemap depicts elevation through an effect called hillshading. Hillshading draws shadows on a map to simulate how the sun's rays affect the terrain from a certain angle. The hillshade effect gives an idea of the terrain and elevation around the trails.
In addition to basemaps, the Living Atlas includes landscape layers that can be used for visualization and analysis. You can add these layers to the map as either basemaps or layers. You'll add three landscape layers: the Multi-Directional Hillshade layer, which calculates hillshade from six directions; the Slope Map layer, which gives a colorized representation of the terrain's slope; and the World Reference Overlay, which shows roads and labels key locations.
- On the ribbon, click the Add button and choose Browse Living Atlas Layers.
- In the Living Atlas search pane, click Filter.
- In the Filter pane, expand Categories. Click Environment, Elevation and bathymetry.
- In the search dialog, type hillshade and press Enter.
- In the search results, locate Terrain: Multi-Directional Hillshade, click the item to open up the layer description pane. In the layer description pane, click Use as Basemap.
The Multi-Directional Hillshade layer replaces the Terrain with Labels basemap.
- Search for slope and add the Terrain: Slope Map to the map as a layer.
The Slope Map layer is added as a layer, similar to the Red Rock Canyon Trails layer that you added earlier.
- In the Filter pane, expand Categories, Boundaries.
- In the search dialog, type overlay and add World Boundaries and Places to the map.
- In the Living Atlas search pane, click the Back arrow to return to the contents pane.
The World Reference Overlay layer has a preset visibility range. At high zoom levels, the layer won't appear on the map.
- In the Contents pane, point to the World Boundaries and Places layer. Click the More Options button and choose Set Visibility Range.
- Drag the Visible Range slider to the end of the range.
The World Reference Overlay layer can now be seen at all zoom levels.
Another issue is that the Slope Map layer covers the Multi-Directional Hillshade basemap. You'll make the Slope Map layer transparent so you can see both layers at once.
- In the Contents pane, point to the Slope Map layer. Click the More Options button and choose Transparency.
- Drag the Layer Transparency slider to approximately 60 percent.
The Slope Map layer becomes darker the steeper the terrain is. When it's draped over the Multi-Directional Hillshade layer, you can see both steepness and shaded relief at high elevations.
- Save the map.
Symbolize the trails by difficulty
Now that you've added background layers, you'll symbolize the trails so users have an idea of each trail's difficulty.
- In the Contents pane, point to the Red Rock Canyon Trails layer and click the Change Style button.
The currently selected style is Location (Single symbol). In this style, all layer features have the same symbol. This style is appropriate when you want to see the features on the map, but you're not interested in their unique characteristics. You want to show the difficulty of each trail, so you'll change the drawing style.
- For the attribute to show, choose Difficulty.
- Under Select a drawing style, click the Options button for Types (Unique symbols).
The Change Style pane changes to show several style options, as well as the difficulty attributes and the symbol for each. The attributes range from Easy to Strenuous, although their order is incorrect.
- Click the vertical ellipsis next to Strenuous and drag the label above Moderate to reorder the attributes.
The default symbols don't convey increases in difficulty very well.
- Click the green line next to Strenuous. In the window that appears, choose the darkest purple color (#4C0073).
- Click OK.
- Change the Moderate symbol to the medium purple color (#A900E6).
- Change the Easy – Moderate symbol to the second-lightest purple color (#DF73FF).
- Change the Easy symbol to the lightest purple color (#E8BEFF).
- Next to Count, click the Symbols button.
- Change the Line Width to 3 pixels and click OK.
- At the bottom of the Change Style pane, click OK and click Done.
- Save the map.
Configure the pop-ups and legend
The default pop-up for the trails isn't user-friendly. In this section, you'll configure the pop-up so it conveys information more clearly. You'll also remove the pop-up for the Slope Map layer and remove the layer from the legend.
- Click any trail to view the default pop-up.
The attribute names are formatted in all capital letters and with underscores instead of spaces.
- Close the pop-up.
- In the Contents pane, point to the Red Rock Canyon Trails layer. Click the More Options button and choose Configure Pop-up.
- Under Pop-up Contents, keep the display set to a list of field attributes. Below the list of attributes, click Configure Attributes.
The Configure Attributes window appears.
- In the Field Alias column, click NAME to make the text editable. Type Trail and press Enter.
An alias is a display name that replaces the field name in a pop-up or table. Aliases can be changed to something more informative or understandable.
- Change the following field aliases:
- DIFFICULTY to Difficulty
- TIME_HOURS to Time (Hours)
- DISTANCE_MILES to Distance (Miles)
- DISTANCE_KILOMETERS to Distance (Kilometers)
- ELEVATION_CHANGE_FEET to Elevation Change (Feet)
- ELEVATION_CHANGE_METERS to Elevation Change (Meters)
- Click OK in the Configure Attributes window.
- At the bottom of the Configure Pop-up pane, click OK.
- Click a trail to view the new pop-up.
The pop-up is easier to understand.
- Close the pop-up.
A pop-up for the Slope Map layer won’t provide useful information in your app, so you’ll disable it.
- In the Contents pane, point to the Terrain: Slope Map layer. Click the More Options button and choose Remove Pop-up.
Finally, you'll make sure the legend conveys only relevant information about the map.
- At the top of the Contents pane, click the Legend button.
All layers except the basemap have a legend entry. The entries for the Slope Map and World Boundaries and Places layers are not useful for interpreting the map.
- At the top of the Legend pane, click the Content button.
- In the Contents pane, point to the Terrain: Slope Map layer. Click the More Options button and choose Hide in Legend.
The Slope Map legend entry no longer appears in the legend.
- Hide the legend entry for the World Boundaries and Places layer.
- Save the map.
Edit the web map's item details
When you first saved the web map, you provided a title, summary, and tags. The title and summary appear in the map’s About pane. You can also review and edit this information on its item page, where you can add more information, such as a description, and set additional properties.
- At the top of the Contents pane, click About and click More Details.
The map's item page opens in a new window. Notice that the Description section is already populated for your map. This description came from the original map that you used to create your map.
- Click Save.
From the item page, you can also monitor map usage to gauge its popularity, edit settings such as the map extent, and share the map with others. (You'll share the map in the next lesson.)
In this lesson, you created a web map for the Red Rock Canyon National Conservation Area. In the next lesson, you'll use your map to create a web app for the kiosks in the Visitor Center.