Supply formats

CSV and GeoPackage

GeoPackage is an open, standard, platform-independent, portable, self-describing, compact format for transferring geospatial information. For more information on this format, please see the Getting started with GeoPackage guide, available here.

The following tables give a comparison between the CSV attributes and the GeoPackage attribution.

CSV attribution and format

GeoPackage attribution and format

CSV format

• Those fields containing text (A) will be enclosed by double quotes which have not been included in the sizes listed in the table above. An asterisk (*) denotes variable length.

• Fields with null data will appear as "" for text and 0 for numeric.

• Each record will be terminated with a carriage return character (ASCII 13) and a line feed character (ASCII 10).

Example of a Code-Point CSV record: "SO160AS",10,"N",1,1,0,1,0,1,0,437292,115542,"E92000001","E19000002","E18000009","E10000014","E07000093","E05012936","L"

GeoPackage format

Note that there are no eastings or northings in GeoPackage; the geometry is already created in the GeoPackage container and is not listed as data but will be seen as a column in a database (PostGIS) called geom with a coordinate reference system of British National Grid EPSG: 27700 for GB postcodes.

Also supplied with the GeoPackage is the Code-Point data for Northern Ireland. This is already projected in Irish Grid EPSG: 29902 so will display in the correct position for this region.

Fields with a null value will appear as [Null] for text (PostGIS) or as an empty field in a GIS. A null numeric value will appear as 0 in both a database and an attribute table in a GIS. Example of a GeoPackage record taken from the Information tool in QGIS: