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Does anyone know of any good sources for US data (counties, congressional districts, etc) in GeoJSON format? Has anyone converted public-domain shapefiles/sources to GeoJSON that they would be willing to share?

Thanks

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If you acquire the datasets there's always the possibility to converted them yourself through ogr2ogr utility in the GDAL library or with QGIS (which uses the GDAL library). – Pedro Mendes Dec 29 '11 at 11:43
@PedroMendes Thanks for the suggestion. That is why I've been doing. I was just curious if there was a more comprehensive source for US data. – Casey Dec 29 '11 at 16:30

4 Answers

up vote 3 down vote

You might take a look at SimpleGeo’s CC0 Places data set, and this related question: Converting SimpleGeo Places GeoJSON file to shapefile?

or just searching the geojson tag may turn up some results for you.

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January 12th, 2012: After SimpleGeo was acquired by Urban Airship in Oct 2011, Urban Aiship said “wind down the availability of the current versions of [SimpleGeo's] Places, Context, and Storage over the next few months.”...The target date for pulling the plug officially will be March 31, 2012. Link – RyanDalton Feb 7 at 18:43
up vote 2 down vote accepted

I found something closer to what I was looking for (US State and County boundaries) on github: https://github.com/johan/world.geo.json/tree/master/countries/USA

The features are very generalized/simplified, but they'll work for a national scale map. Country boundaries for the whole world are available in this repo too.

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up vote 1 down vote

Try using Freebase API. For example the following article

http://www.freebase.com/view/en/orange_county

Available in JSON:

http://www.freebase.com/experimental/topic/standard/en/orange_county

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up vote 1 down vote

After trying to find similar GeoJSON versions of US State and County boundaries, I finally decided to roll my own from the United States Census Cartographic Boundary Files, converting them to GeoJSON and KML formats using the MyGeoData vector converter.

I've made the results of this conversion available at: http://eric.clst.org/Stuff/USGeoJSON. Feel free to use these if they will help.

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