CAD – AutoCAD DWG

Driver short name

CAD

OGR DWG support is based on libopencad, so the list of supported DWG (DXF) versions can be seen in libopencad documentation. All drawing entities are separated into layers as they are in DWG file, not in 1 layer as DXF Driver does.

DWG files are considered to have no georeferencing information through OGR. Features will all have the following generic attributes:

  • CADGeometry: CAD Type of the presented geometry.

  • Thickness: Thickness of the object drawing units (if it is not supported by this type, it is set to 0.0).

  • Color (RGB): IntegerList contains R,G,B components of the color.

  • ExtendedEntity: Where available, extended entity attributes all appended to form a single text attribute.

Driver capabilities

Supports Georeferencing

This driver supports georeferencing

Supports VirtualIO

This driver supports virtual I/O operations (/vsimem/, etc.)

Supported Elements

The following element types are supported:

  • POINT: Produces a simple point geometry feature.

  • LINE: Translated as a LINESTRING. Rounded polylines (those with their vertices’ budge attributes set) will be tessellated. Single-vertex polylines are translated to POINT.

  • CIRCLE, ARC: Translated as a CIRCULARSTRING.

  • 3DFACE: Translated as POLYGON.

The driver is read-only.