In an Interactive Map visual, Arcadia Enterprise enables you to create choropleth maps. A choropleth map shows geographical areas that are shaded in proportion to the value of the measurement that is displayed on the map.
0
represents unpopulated areas); so it can be used in choropleth
maps.To create a choropleth map, for each visual, you must specify the following:
Let's create a choropleth map that colors the average tax liability in California by zip code.
In our example, the choropleth interactive map visual is based on the dataset
Personal Income Tax Statistics by Zip Code
. For an overview
of shelves that specify this visual, see Shelves for Interactive Map Visuals.
Populate the shelves from the available fields in Dimensions and Measures in the Data menu.
Note that to create a choropleth map, the dataset must have at least one field in the Geo shelf with Geo-type Shape ID.
Select zip_code
field and drag it over the
Geo shelf to identify the
shapes by zip code.
Cast this to the appropriate Geo Type: click the field on the shelf, and in the Field Properties menu, select Change Type, and select Shape ID. This helps in identifying the measure that maps to the shape.
Under Measures, select the
avg(total_tax_liability)
field, and
drag it over the Colors shelf.
Change the aggregation from
total_tax_liability
, by selecting
Aggregates Average
This colors the average tax liability in California by zip code.
Click Refresh Visual.
The choropleth map visual appears.
If the visual does not display a choropleth map, check that the Geo-type
of the zip_cod
e field is set to Shape
ID.
Proceed to Customizing the choropleth map.