I have a geojson file with the boundaries and some very basic statistics (population) for all the counties in US. States are enumerated (1,2,...), not named.
I also have a csv file with a comprehensive demographic and health statistics for each county (county is a row, statistics are columns).
I would like to add these values from the csv file as properties, for the county.
Is there a good, open source tool you would recommend for doing this programmatically, and in bulk. I was looking into Python's geojson.