pgsql2gist

Create maps using the Github Gist API as GeoJSON or TopoJSON, directly from PostGIS.

dev-branch

master

Objective

Create a command line utility similar to pgsql2shp, but the output of which should be a link to an anonymous private gist. The gist link should leverage Github’s rendering of GeoJSON/TopoJSON, e.g. render a map.

See issues for additional features to be implemented.

Current Usage / Caveats

Listed below is the --help usage information.:

POST GeoJSON or TopoJSON features from PostGIS to a Github Gist.

Example usage: pgsql2gist --host localhost --user matt tilestache \
               "SELECT name, ST_AsGeoJSON(geom) AS geometry FROM neighborhoods LIMIT 5;"

Current SELECT Statement Requirements:
 - Geometry must be in EPSG:4326 WGS84 coordinate system
 - Geometry must be wrapped in ST_AsGeoJSON(), ST_AsTopoJSON()

usage: pgsql2gist [-f FILE] [-d DESCRIPTION] [-h HOST] [-p PORT] [-P PASSWORD]
                  [-u USER] [-g GEOM_COL] [-t TOPOLOGY_LAYER] [-v] [-?]
                  database SELECT

positional arguments:
  database              PostGIS database name.
  SELECT                SELECT Statement. NOTE: Geometry must be WGS84;
                        wrapped in ST_AsGeoJSON() or AsTopoJSON().

optional arguments:
  -f FILE, --file FILE  Filename. NOTE: Must end in 'geojson' or 'topojson'
                        extension. (default: upload.geojson)
  -d DESCRIPTION, --description DESCRIPTION
                        Description of upload (default: File uploaded using
                        pgsql2gist.)
  -h HOST, --host HOST  PostGIS database hostname. (default: None)
  -p PORT, --port PORT  PostGIS database port. (default: 5432)
  -P PASSWORD, --password PASSWORD
                        PostGIS user password. (default: None)
  -u USER, --user USER  PostGIS database user. (default: postgres)
  -g GEOM_COL, --geom-col GEOM_COL
                        Geometry column name as defined in SELECT statement.
                        (default: geometry)
  -t TOPOLOGY_LAYER, --topology-layer TOPOLOGY_LAYER
                        For TopoJSON Queries; Name of Topology Layer (default:
                        None)
  -v, --verbose         Verbose output. (default: False)
  -?, --help

Resources

Gist API: (http://developer.github.com/v3/gists/)

Thanks

The spiffy idea behind a db context manager comes from Migurski's awesome TileStache map server. http://tilestache.org