I am new to GIS. As a part of my research, I want to figure out among OSSIM, Saga API, Terralib and MApnik which one will best satisfy the following functionalities and why ( all for desktop GIS application).
- Loading/Saving major GIS files (library OGR/GDAL)
- Database compatibility.
- Vectorial element linked to a field of the database
- Zooming, panning
- Multiple vector Layers
- Performances (loading of large shape file, quick zoom, quick panning, tile support, etc)
- User defined symbol
- Zone selection (polygon, circle, square, etc.)
- OGC compatibility
Also which all can be used with Qt.
Thanks in advance.