In the previous lesson, you changed the style of your Detroit Demographics layer and configured pop-ups to highlight areas of high child population and low household income.
In this lesson, you'll use the map legend and the pop-ups that you configured to determine areas in Detroit where your charity might want to target programs for children in poverty. Then, you'll edit your map's item details to include a description of the map and its purpose.
Use the legend
First, you'll use the map's legend to help you understand patterns in the demographic data shown on the map.
- If necessary, open your Detroit Demographic Analysis map.
- In the Contents pane, click the Legend button.
The Legend pane opens.
According to the legend, the Detroit region has an average median household income of approximately $54,000, which is lower than the national average median household income in 2018. Census tract areas with orange circles have below-average median household income, with darker shades indicating households with income close to the poverty level. Most of the dark orange census tract areas are located close to the city center.
Your results may be slightly different than this example if you had a different map extent when you enriched the layer.
Circles are used to represent the number of children under the age of 14 in each census tract area. Larger circles indicate greater numbers of children, while smaller circles indicate fewer children. On the map, there is a cluster of several large darker orange circles near Dearborn, indicating high child populations and very low income. Census tract areas near Dearborn, such as the 26163573500 tract, might be a good place for your charity to offer programs to help children living in poverty.
Next, you'll use the pop-ups that you configured to get more detailed household income and population information for individual census tract areas.
- Click the largest orange symbol for the census tract area near Dearborn to see its pop-up. Your results may differ due to updated demographic data.
The pop-up shows that the median household income of this census tract area is approximately $28,000 and that 1,841 children under the age of 14 live there. This information confirms that this area near Dearborn would greatly benefit from the programs (free after-school care, breakfast programs, and more) that your charity wants to fund this year.
- Close the pop-up.
- Click the largest orange symbol for the census tract area near Highland Park to see its pop-up.
The median household income in the 26163552800 census tract area is approximately $23,000 and 1,636 children under the age of 14 live there. This makes it another appropriate candidate for your charity's programs.
- Click other orange census tract areas to see details about income and population displayed in the pop-up.
Edit the item details
Now that you've used the legend and pop-ups to help you better understand the demographic patterns and data in the map, you can provide a clear description of the map and its purpose. 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.
- In the Legend pane, click the About button. Click More Details.
The map's item page opens in a new window. Each item in ArcGIS has an item page, which helps you manage your content and includes descriptive information about the item. By default, most item pages have no description, only the summary and tags that you provided when you saved the map.
You should include a description of your map to make it easy to identify later and to help others find it and understand its purpose if you decide to share it. The description can also appear in apps created with the map.
- On the item page, next to Description, click Edit.
- In the Edit Description box, type a description for the map, for example:
This map shows demographic and income data in Detroit. What stands out is a pattern of low-income households in the downtown area combined with areas of high child population. This pattern helps answer where in Detroit our charity should focus its resources to help children living in poverty.
- Click Save.
It's also good practice to give credit to the data providers.
- For Credits (Attribution), click Edit and type Esri, US Census.
- Click Save.
- Close the item page.
In this lesson, you used the map legend and the demographic information provided in pop-ups to identify where in Detroit your charity should focus its resources to help children in poverty. You then edited the map's item details to include a description of its purpose. In the next lesson, you'll share your findings with donors and other interested organizations by creating a simple web app.