- import [osm2psql](http://www.volkerschatz.com/net/osm/osm2pgsql-usage.html#projections)
- geography - WGS84, spheric coordinates
- geometry - projekcia, cartesian coordinates
- [desciption](http://workshops.boundlessgeo.com/postgis-intro/geography.html)
## ESPG
- 4326 - WGS84 (GPS)
- 3857 - Pseudo-Mercator
- [Coordinates vs projection](http://gis.stackexchange.com/questions/48949/epsg-3857-or-4326-for-googlemaps-openstreetmap-and-leaflet)
- 27700 - OSGB (easting, northing)