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With those givens, this is how I appended tract and block attriutes to some address points data using PostGIS: First I used ogr2ogr to import the three shapefiles into PostGIS: Import addresses using ogr2ogr:
In PostGIS, if you have a table of points, and the census boundary information that @Sminbamangu refers to you could calculate this using the following approach: SELECT c.census_tract, p.point_id FROM census_boundary as c, table_of_points as p WHERE ST_Contains(c.geom, p.geom);
I have about 20 million sets coordinates from the Philadelphia, PA, USA region. For each set of coordinates I would like the FIPS code of the corresponding census tract. I looked at this thread: Free api to reverse geocode latitude, longitude to census tract? However, I think any http/API solution would be too slow.
ZIP+4 codes are really linear features (describing a route or portion of a delivery route) and point features (describing an address, a post office, or a post office box). There is no easy mapping between them, even in a many-to-many. Best yet, both periodically change. Good luck. –
Finally, using the get_tract function, I can get back a census tract like this: SELECT get_tract(geomout, 'tract_id') As tract_id FROM geocode('8615 Chestnut Oak Rd, Baltimore, MD 21234', 1) As g;` Which returns a tract. The Question: Now that I've shown what I've been able to do, what I can't do is get the GeoJSON for this tract.
Each address location contains a latitude and longitude coordinate pair so that it can be sited on a map and used in location analysis. The US Address Fabric adds the full Federal Information Processing Standard (FIPS) code to allow Census level demographics to be attached automatically.
Tract FIPS code from commuter survey, missing record in Census TIGER table 6 Finding State, County, Place, and Census Block FIPS codes from a coordinate (latitude and longitude)
Bulk lookup of address census tract and block. 4. US Census API - data by census tract. 3.
What is the easiest and most efficient way to determine the respective census tract number for each address? Over 50,000 addresses and I just want to pull in the tract into excel for each. Right now it is just one single data set. I can manually look up the address in some third party systems, but that process is extremely inefficient.
Geocodio can add Census FIPS state, county, place, tract, block, and block group codes to addresses via API or spreadsheet upload. You can do batch processing as well as single address. You can do batch processing as well as single address.