# NAS - ALKIS

The NAS reader reads the NAS/ALKIS format used for cadastral data in Germany. The format is a GML profile with fairly complex GML3 objects not easily read with the general OGR GML driver.

This driver depends on GDAL/OGR being built with the Xerces XML parsing library.

This driver was implemented within the context of the PostNAS project which has more information on it's use.

The driver looks for "opengis.net/gml" and one of the strings semicolon separated strings listed in the option NAS_INDICATOR (which defaults to "NAS-Operationen.xsd;NAS-Operationen_optional.xsd;AAA-Fachschema.xsd") to determine if a input is a NAS file and ignores all files without any matches.

## See Also

- PostNAS
- norGIS ALKIS-Import