GeoPackage

OS Terrain 50 contours are supplied as a national GeoPackage file.

GeoPackage offers users the following benefits:

• The single file is easy to transfer and offers the end-user a rich experience.

• Attribute names are not limited in length, making the format user-friendly.

• The file size limit is very large at 140 TB (a file size limit might be imposed by the file system to which the file is written).

• It supports raster, vector and database formats, making it a highly versatile solution.

• It is an OGC standard.

• In most cases, it is a plug-and-play format.

For general guidance on using the product in GeoPackage format, please see the Getting started with GeoPackage guide.

Data structure

The names of the GeoPackage layers in the OS Terrain 50 contour supply are outlined in the following table.

Layer name
spot_height
land_water_boundary
contour_line

Attribute naming format comparison

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
Fid	fid
Id	id
propertyValue	property_value
propertyValue_uom	N/A
spotHeightType	spot_height_type
waterLevelCategory	water_level_category
contourLineType	contour_line_type