Supply formats overview
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 GeoPackag guide.
The following tables give a comparison between the CSV attributes and the GeoPackage attribution:
CSV attribution and format
Mnemonic | Description | Data type | Size |
N/A | N/A | N/A | N/A |
PC | Postcode | A8 | 8 |
PQ | Positional_quality_indicator | I2 | 2 |
EA | Eastings | I6 | * |
NO | Northings | I7 | * |
CY | Country_code | A9 | 9 |
RH | NHS_regional_HA_code | A9 | 9 |
LH | NHS_HA_code | A9 | 9 |
CC | Admin_county_code | A9 | 9 |
DC | Admin_district_code | A9 | 9 |
WC | Admin_ward_code | A9 | 9 |
GeoPackage attribution and format
Description | Data type |
fid | int |
postcode | TEXT |
positional_quality_indicator | int |
N/A | N/A |
country_code | TEXT |
nhs_regional_ha_code | TEXT |
nhs_ha_code | TEXT |
admin_county_code | TEXT |
admin_district_code | TEXT |
admin_ward_code | TEXT |
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 Open CSV record:
"SO16 0AS",10,437292,115542,"E92000001","E19000002","E18000009","E10000014","E07000093","E05012936"
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 geometry with a coordinate reference system of British National Grid
EPSG: 27700 for Great Britain (GB) postcodes.
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 Code-Point Open GeoPackage record taken from the Information tool in QGIS:
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