OGR has support for INTERLIS reading and writing.
INTERLIS is a standard which has been especially composed in order to fulfil the requirements of modelling and the integration of geodata into contemporary and future geographic information systems. With the usage of unified, documented geodata and the flexible exchange possibilities the following advantage may occur: OGR supports INTERLIS 1 and INTERLIS 2 (2.2 and 2.3).


Data is read and written into transfer files which have different formats in INTERLIS 1 (.itf) and INTERLIS 2 (.xml). For using the INTERLIS model (.ili) a Java interpreter is needed at runtime and ili2c.jar (included in the Compiler for INTERLIS 2) must be in the Java path. The model file can be added to the transfer file seperated by a comma.

Some possible transformations using ogr2ogr.

Arc interpolation

INTERLIS arc geometries are converted to polygons.

The interpolation angle can be changed with the environment variable ARC_DEGREES (Default: 1 degree).

Other Notes