Characteristics - UKMap
UKMap is a modern, highly detailed mapping database that contains 7 integrated data layers within a single product having a target accuracy of ±1 m (RMSE within 98.5% confidence limits). UKMap is currently available for London and provides a product suite based on the following data layers: Base layer (topographic map), Overlay map (vector map), Points layer, Addresses data, Points of Interest attribute data, Heights data, and Ortho aerial photography layer (Figure 1).
Figure 1- UKMap Product Suite
The properties of these available UKMap dataset in Landmap resources are described in Table 1.
Table 1 - : UKMap datasets and their properties
Unique Classification Code (UCC)
The user of UKMap datasets will come across the term Unique Classification Code (UCC) used in attribute tables. Every point and polygon has a UCC that is used to describe and display every point or polygon in UKMap. The UCC connects the polygons and points to the tables; one for addresses, one for points of interest and one for building heights. These UCC are,
- FTC - Feature Type Code
- FCC - Feature Classification Code
- GET - Geographic Entity Type
- GTN - Geographic Type Number (unique)
- SRC - Source of Feature
- DFE - Date of Feature Edit
What are the formats of the UKMap data?
Table 2. Provides details of the format of the data after downloading from Landmap Kaia.
|Basemap||DBF & SHP - There are 2 versions of the dbase (DBF) and shapefiles (SHP). The latest version Edition 9 has a suffix of _ed9.|
|Overlay||DBF & SHP - There are 2 versions of the dbase (DBF) and shapefiles (SHP). The latest version Edition 9 has a suffix of _ed9.|
|Points||DBF & SHP - There are 2 versions of the dbase (DBF) and shapefiles (SHP). The latest version Edition 9 has a suffix of _ed9.|
How do I find out the date of when the data was collected/updated?
When viewing the attribute table of the shapefile (SHP) or DBF file there is a field called DFE this stands for Date of Feature Edit. The field provides a five or six figure date comprising YYMMDD e.g. 91027 = 2009, October 27 and 100217 = 2010, February 17. The data is republished every 6 months with updates where necessary.
More information about the UKMap and data specification can be viewd on the UKMap website.