OS Terrain 50 contours are supplied as a national GeoPackage file. GeoPackage (.gpkg) is an open, standards-based data format as defined by the OGC. It is designed to be a lightweight format that can contain large amounts of varied and complex data in a single, easy to distribute, and ready to use file.
GeoPackage can be used in most GIS software in its native format without translation. GeoPackage attribute names are not limited in length. The file size limit is very large at 140 TB*, so lots of data can be easily accommodated. GeoPackage supports raster, vector, and database formats, making it a highly versatile solution.
* A file size limit might be imposed by the file system to which the file is written.
The names of the GeoPackage layers in the OS Terrain 50 contour supply are outlined in the following table.
| Layer name |
|---|
The naming of attributes has been updated in accordance with guidelines to make them more user friendly.
| 2022 GPK Attribute name | 2023 GPK Attribute name |
|---|---|
spot_height
land_water_boundary
contour_line
Fid
fid
Id
id
propertyValue
property_value
propertyValue_uom
N/A
spotHeightType
spot_height_type
waterLevelCategory
water_level_category
contourLineType
contour_line_type