Maps in TALD are generated automatically based on the value columns.
As explained in Feature datasets, you can have multiple value columns in order to generate different maps. You can use both nominal and numeric values.

Keep in mind that a large number of values is difficult to perceive, do not use more than 5 values on one map.

If you want, you can experiment with map visualizations by yourself using the lingtypology package for R.
You can find a detailed tutorial for the package here.

A sample code for experimenting with TALD visualizations as well as the necessary metadata such as village coordinates can be found here.