Safecast is user sourced radiation data, and has a public API serving data in GeoJSON format (https://api.safecast.org/en-US/home). However, I'm having difficulty in accessing this data via OGR:
% ogrinfo -so " https://api.safecast.org/en-US/measurements?distance=10&latitude=37.42&longitude=141.033 " ERROR 4: Failed to read GeoJSON data ERROR 4: Failed to read GeoJSON data FAILURE: Unable to open datasource ` https://api.safecast.org/measurements.json?distance=10&latitude=37.42&longitude=141.033' with the following drivers. So OGR sees that the data is formatted as GeoJSON, but is unable to read it for some reason. Using curl to manually make the query I get: % curl -i -H "Accept: application/json" " https://api.safecast.org/en-US/measurements?distance=10&latitude=37.42&longitude=141.033 " HTTP/1.1 200 OK Server: nginx Date: Mon, 05 May 2014 19:43:55 GMT Content-Type: application/json; charset=utf-8 Transfer-Encoding: chunked Connection: keep-alive Status: 200 OK Strict-Transport-Security: max-age=31536000 Access-Control-Allow-Origin: safecast.org Access-Control-Allow-Methods: POST, GET, OPTIONS Access-Control-Allow-Headers: *, X-Requested-With Access-Control-Max-Age: 100000 X-UA-Compatible: IE=Edge,chrome=1 ETag: "e4650539a53d3698d8deb02e912b9ae3" Cache-Control: max-age=0, private, must-revalidate X-Request-Id: a30a38247c16374a39ada0a8d4d2fcde X-Runtime: 0.022855 X-Rack-Cache: miss X-Powered-By: cloud66 [{"captured_at":"2014-01-30T05:03:25Z","device_id":null,"id":30981293,"location_name":null,"original_id":null,"unit":"cpm","user_id":3,"value":4675.0,"latitude":37.41997666666666,"longitude":141.03297166666667},{"captured_at":"2014-01-30T05:25:26Z","device_id":null,"id":30981556,"location_name":null,"original_id":null,"unit":"cpm","user_id":3,"value":2470.0,"latitude":37.42001666666667,"longitude":141.03303666666667},{"captured_at":"2014-01-30T05:00:54Z","device_id":null,"id":30981263,"location_name":null,"original_id":null,"unit":"cpm","user_id":3,"value":5428.0,"latitude":37.41996666666667,"longitude":141.03301666666667},{"captured_at":"2014-01-30T05:21:20Z","device_id":null,"id":30981507,"location_name":null,"original_id":null,"unit":"cpm","user_id":3,"value":12191.0,"latitude":37.420003333333334,"longitude":141.03305333333333},{"captured_at":"2014-01-30T05:00:49Z","device_id":null,"id":30981262,"location_name":null,"original_id":null,"unit":"cpm","user_id":3,"value":5199.0,"latitude":37.41999666666667,"longitude":141.03306166666667},{"captured_at":"2014-01-30T05:25:21Z","device_id":null,"id":30981555,"location_name":null,"original_id":null,"unit":"cpm","user_id":3,"value":2423.0,"latitude":37.42006833333333,"longitude":141.03301333333334},{"captured_at":"2014-01-30T05:03:30Z","device_id":null,"id":30981294,"location_name":null,"original_id":null,"unit":"cpm","user_id":3,"value":4456.0,"latitude":37.41992833333333,"longitude":141.03297333333333},{"captured_at":"2014-01-30T05:00:59Z","device_id":null,"id":30981264,"location_name":null,"original_id":null,"unit":"cpm","user_id":3,"value":5672.0,"latitude":37.419963333333335,"longitude":141.03291666666667},{"captured_at":"2014-01-30T05:00:44Z","device_id":null,"id":30981261,"location_name":null,"original_id":null,"unit":"cpm","user_id":3,"value":5135.0,"latitude":37.420035,"longitude":141.03309},{"captured_at":"2014-01-30T05:21:14Z","device_id":null,"id":30981506,"location_name":null,"original_id":null,"unit":"cpm","user_id":3,"value":12164.0,"latitude":37.42006333333333,"longitude":141.03293666666667}] Those do look like legitimate observations, but I don't know if they comply to the GeoJSON format since I'm new to JSON. I'm using this version of GDAL/OGR, which was part of the pre-packaged binaries for qgis for my Mac: % ogrinfo --version GDAL 1.10.1, released 2013/08/26 Eventually I'd like to use GDAL/OGR to conveniently create a local spatial database from such a query. However, I need to get over this hurdle first. Cheers, Mark -- [email protected]
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