These notes provide guidance on using OS VectorMap Local in GIS in order to create maps and analysis using the data. Features contained in VectorMap Local are differentiated by Feature Code. Every feature type has a unique feature code that is described in the User Guide. The data is supplied by Ordnance Survey in GML format. For ease of use EDINA has converted the data into 2 other formats: Not all feature classes are in every tile so the exact number of feature classes will change depending on which tile you load. DWG is commonly used by CAD systems. As with Shapefiles we have created Layers in the DWG file to hold groups of data. Attributes are stored in the DWG as Extended Entity Data (or XData). This data can be viewed in AutCAD Map 3D by using the Express Tools –>, Tools –>, List Object Xdata or typing xdlist in the command prompt. VectorMap Local is also provided in the native GML (Geography Markup Language) format. This is a non proprietary data format, therefore data requires conversion in order to be fully utilised in GIS such as ArcGIS, MapInfo, gvSIG, QGIS etc. Most GIS and CAD (ArcGIS, AutoCAD, QGIS etc.) will read the GML directly using either their Add data… options or Import Data (as long as GML is selected as the import format). This will allow you to work with the data and save it to a native format. However, it will probably not make it very easy to handle the data because, by default, VectorMap Local is in five feature classes: Ordnance Survey have provided XML and XSL stylesheets which can be used as a guide to styling VectorMap Local data. The stylesheets are available from the Ordnance Survey VectorMap Local website. The XML and XSL stylesheets can be used with third part software to produce SVG files from the GML. This can be quite tricky, therefore, most users are more likely to manually derive the cartographic styling from the XML files and apply in GIS. Users can open the XML files in text editing software (e.g. Textpad or Notepad) and manually input the styling (e.g. colour, line width etc) into their chosen GIS. This method is useful if using open source GIS which do not support Layerfiles or the TAB file styling. Not found what you are looking for? Please ask a question or give feedback by emailing (firstname.lastname@example.org) or phoning (0131 650 3302) the EDINA Helpdesk. Source.