# datafusion-geo 
Add geo functionality extension to datafusion query engine.

**Goals**
1. Support multiple wkb dialects
2. Provide DataFusion user defined functions 
3. Prefer using geos library if feature flag enabled

## Useful Links
1. Ewkb format: https://github.com/postgis/postgis/blob/master/doc/ZMSgeoms.txt
2. PostGIS functions: https://postgis.net/docs/manual-dev/PostGIS_Special_Functions_Index.html