What is a graduated colors map?
Graduated color symbology is used to show a quantitative difference between mapped features by varying the color of symbols. Data is classified into ranges that are each assigned a different color from a color scheme to represent the range. Maps that vary in color this way are usually called choropleth maps.
What are symbol maps used for?
Proportional symbol maps are typically used to show counts or totals and can be used to visualize classed or unclassed data. When using classed data, the map becomes a type of proportional symbol map called a graduated symbol map.
Can you change the symbologytype of a layer?
The symbologyType on the Layer object is a read-only property. In other words, you can’t change a graduated colors symbology to a graduated symbols or a unique value symbology. You can only change the properties for a specific symbology class on a layer.
What do you need to know about graduated colors?
The GraduatedColorsSymbology class provides access to different properties that allow you to change the appearance of a layer’s graduated colors symbology. The GraduatedColorsSymbology class provides access to a limited number of properties and methods that allow you to automate layer symbology in a map document ( .mxd) or layer file ( .lyr ).
Where to find class break descriptions in ArcMap?
A sorted list of strings that represent the descriptions for each class break value that can optionally appear in a map document’s legend. These values are only accessible in the ArcMap user interface by right-clicking a symbol displayed within the Symbology tab in the Layer Properties dialog box and selecting Edit Description.
What kind of operations can be done in symbology?
Basic operations such as changing the number of classes, modifying class break values and labels, or changing the field that the symbology is based on are some of the properties that can be modified.