Datasets

The Guernsey Digimap base map is maintained by the States of Guernsey Digimap Service Team.

To help us ensure that the mapping data is as accurate as possible, if you notice any omissions or data that you feel is incorrect please report it to us. You can do this by filling in the amend form and sending it to Administration & System Manager, States of Guernsey Digimap Services, Old Guernsey Tobacco Factory, St. Peter Port, Guernsey, GY1 2ET, Fax. 01481 720968 or e-mail gds@gov.gg

Data sets comprise the following:

Land and Roads

• The roads data set is made up as part of the seamless 100% polygon coverage of each Bailiwick Island. Every polygon segment is attributed unique identifiers, including the official road name and depicts the precise extents of the road.
• Land Parcels: The land parcel polygons depict the extents of individual land parcels under contiguous ownership. The data set is fully attributed with unique identifiers, ownership references, full address details and other geometric data. Each land parcel is attributed to indicate how it is accessed from the public highway.
• Buildings: The building polygons, fully attributed and classified by type.
• Parishes: High Water polygon data set of Parishes.
• Polygon Water Features: Polygon layer depicting the Islands water storage reservoirs, ponds and quarries.
• Water lines (Streams): Line data set depicting the alignment of all streams above and below ground level, with appropriate attributes.
• Road Labels: These labels are supplied as AutoCad .DWG annotation labels, and give greater flexibility within the Arcview projects.

Orthophotographs

These are derived from more than 470 aerial photographs which have been processed so they can be used seamlessly with the ArcView GIS product at a wide range of scales. The current Orthophotos were captured in June 2009.

• Guernsey 2009
This fully Orthorectified seamless image dataset of Guernsey was taken in June 2009. and is supplied with a ground resolution of 10cm, the preferred method of distribution is using ER Mapper’s ECW compression format.

• Guernsey 2006
This fully Orthorectified seamless image dataset of Guernsey was taken in June 2006. and is supplied with a ground resolution of 10cm, the preferred method of distribution is using ER Mapper’s ECW compression format.

• Guernsey 2004
This fully Orthorectified seamless image dataset of Guernsey was taken in Sept. 2004. and is supplied with a ground resolution of 15cm, the preferred method of distribution is using ER Mapper’s ECW compression format.

• Guernsey 2001
This fully Orthorectified seamless image dataset of Guernsey was taken in June 2001. and is supplied with a ground resolution of 15cm, in ECW format.

• Guernsey1996 Aerial photographs
This fully Orthorectified seamless image dataset of Guernsey was taken in March 1996, and is supplied with a ground resolution of 20cm, in ECW format.

• Guernsey1990 Aerial photographs
This fully Orthorectified seamless image dataset of Guernsey was taken in September 1990, and is supplied with a ground resolution of 25cm, in ECW format.

We can also supply unrectified archive photography dating from

1957
1962,1969
1974,1975,1979
1986,1988

NB. Some archive data sets do not provide complete Island coverage

Details of further data sets

There are a number of additional data sets available if specifically required.

Other Datasets Available for licence

• Height data (over 2m spot heights)
• AutoCAD format data
• Road Centrelines