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 See [https://wiki.openstreetmap.org/wiki/Contra_Costa_County_Address_Import](https://wiki.openstreetmap.org/wiki/Contra_Costa_County_Address_Import)
 
+## Data Source
+
+https://www.contracosta.ca.gov/1818/GIS (https://gis.cccounty.us/Downloads/General%20County%20Data/CCC_Adddress_Points.zip)
+
+*TODO:* establish licensing because https://gis.cccounty.us/Downloads/General%20County%20Data/CCC_GIS_Disclaimer.pdf says "THIS DATA CONTAINS COPYRIGHTED INFORMATION OF THE COUNTY OF CONTRA COSTA"
+
+*TODO:* see if there is updated data, this was modified 8/27/2019
+
 ## Field Mapping
 
 `street_num` -> `addr:housenumber`