3D visualization of raster DEM- https://www.youtube.com/watch?v=2KrCsbP0kUs
Spatial Query is selection of features that satisfies a certain condition which relates to other features in a space.
Using plugin- Spatial query
Labelling with more than one field names and in different lines
Hierarchy of extensions
File levels and their uses.
It contains: Layer source pointer + Style information + Composers + a whole heap of other stuff
It contains: Layer source pointer + Style information
It contains: Style information