You will learn: how to use smart mapping styles to work with multiple layers, perform simple calculations, and display data in meaningful ways.
The ArcGIS Online Map Viewer allows you to explore datasets with a variety of smart mapping styles. The nature of your layer data determines the styling suggestions that you see by default in the viewer. You can also change the attribute you're showing on the map, and compare multiple attributes. The suggested styles, patterns, shapes, and color ramps are easily customized. Using smart mapping styles allows you to quickly create sophisticated-looking visualizations without writing any code, and your web map styles remain consistent regardless of the type of application that consumes it. In this tutorial, you'll use smart mapping to Style feature layers of population density by city in Los Angeles County.
This is just one example of smart mapping in action! Learn more here.
In the top nav, click Map to launch the Map Viewer.
In the top bar, click + Add > Add Layer from Web. Use the URL below and the dialog to add the following layer:
In the top bar, click Basemap > Dark Gray Canvas to set the basemap.
Click City Boundaries > Change Styles and select the following:
The Compare A to B style compares the first attribute to the second, in a simple ratio. In this tutorial, the layer style calculates the number of people per square mile, or population density. The data is representated by proportional shading within the city polygons. This visualization within predefined areas is called a chloropleth map.
Save your map.
Your styled web map should look something like this.
Try reformatting your layer with the Color and Size drawing style to experiment with a different method of rendering population. Which style do you think is more effective?
Heat maps show areas of high activity with colors that appear to glow hotter. Heat map styling can only be used with datasets of points. Add the Trailheads layer to your web map. In the Map Viewer, click Trailheads > Change Styles > Select a drawing style > Heat Map > Options.
If you want to learn more about smart mapping styles or get more ideas for displaying different types of data (numbers, time, locations, categories, etc.), visit the ArcGIS Online documentation.