ALKIS NAS to GeoPackage Converter
Convert specialized German cadastral XML records into structured GIS models.
The German ALKIS cadastral land register uses the NAS XML schema, which features complex relationships that standard web models cannot parse directly. This guide details how to import NAS datasets into spatially indexed database tables using specialized GDAL drivers.
Indirect Mapping Execution Required
Because database connection attributes or local attributes parsing is required, direct web streams are disabled. Use the GDAL CLI script below for precise terminal conversions.
Specification Rules
- Incorporate official German cadastral data into regional planning databases
- Analyze parcel boundary lines and ownership coordinates across municipalities
- Import official construction plan boundaries into regional planning files
- NAS uses a highly custom XML schema that standard converters fail to read
- Must use GDAL versions compiled with the libxml2 library
- Output coordinates default to German Gauss-Kruger or UTM projections
GDAL Direct Equivalent Terminal Command
Frequently Asked Queries
Why does standard conversion fail on NAS XML files?
NAS uses a complex GML scheme with deeply nested element properties. Standard models only see basic text elements rather than real shapes/geometries.
Which coordinate reference system does ALKIS use?
Most ALKIS models in Germany are projected using local coordinate systems like ETRS89 / UTM (EPSG:25832 or EPSG:25833).
Where can I find schema definitions?
We recommend using targeted QGIS imports or custom python libraries designed to process German cadastral schemas.