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American Community Survey (ACS) Data (view source)
Revision as of 21:12, 12 February 2021
, 21:12, 12 February 2021→Working with the API
The API doesn't seem to require a key, but you can request one from https://api.census.gov/.
The data contains null values, as well as values that indicate error codes (-999999999,-888888888,-666666666,-555555555,-222222222, and others. See https://www.census.gov/data/developers/data-sets/acs-1year/notes-on-acs-estimate-and-annotation-values.html. Generally, it appears that all negative values can be striped. Every field is string quoted (even if it's a number) including error codes, except for nulls.
The API uses improper URL encoding (or more accurately, doesn't use URL encoding), so most methods for auto-populating URL parameters in scripting languages will not function correctly. Build URLs manually.
