Collada is an open-standards 3D geometry exchange format based on XML. Currently, it is mainly used in conjunction with KML/KMZ as an embedded container for geo-referenced 3D models. You should consider it a legacy format for all other use cases as it lacks in support for modern materials (e.g. PBR) as well as in import/export support in the major 3d apps. We recommend glTF as an alternative.
COLLADA import has a the following options:
Press Browse... to open a file dialog to select an .dae file to import.
Import as static model
When checked, the file will be imported 'as is' and will not be modifiable by cga rules. Otherwise, Start Shapes will be created from the provided (if available: textured) polygons, ready to be used with CGA rules.
Align to terrain
When checked, the geometry will be automatically aligned to the terrain.
Size factor applied to the imported object.
Adds the specified offset to the imported object.