ArcMap allows you to create thematic maps = maps that show the color of a feature or the size of a feature as a function of the underlying feature attribute data. Your choice of color, size, and underlying classification system is critical to create a truly meaningful map. Do NOT simply accept the defaults that ArcGIS provides to you. Always create your own classification system that is appropriate, objective, and meaningful for your data your map, and your analysis.
In this tutorial, you will learn how to:
• Create custom classes in a legend
• Change class values
• Change class colors
Group layers contain other layers. This gives the users a better organization of the layers in the map. They have similar behavior to that of single layers in the table of content. Hence turning off the visibility of a group layer will turn off the visibility of all the layers within the group.
This tutorial covers the steps of:
• Adding a group layer to the map
• Adding a layer to the group