DIGIMAP (Registering, Downloading and Converting)
Downloading geodata from EDINA / Digimap
Before you use digimap, you need to register first. Please follow the instructions below on how to register.
- Login to MUSE
- Click on the Library tab at the top of the page.
- Choose Subject Databases in the Library eResources section
- Choose Alphabetical Table
- Scroll down until you find the link called Digimap via EDINA and click on it.
- Click on Connect to Digimap located in the Quick Links menu on the right hand side of the page.
- At the bottom of the Terms and Conditions page click Continue then fill out the registration form. After you have registered it normally takes about 48 hours until you can access Digimap.
Selecting and Downloading OS Maps in Digimap
- After registering, follow steps 1 to 6 above to access the Digimap site again, then follow the instructions below on how to select and download OS maps.
- From the Digimap home page select: “Ordnance Survey”
- Agree to the terms and conditions on the copyright notice page.
- Choose “Download OS mapping data for use in GIS/CAD” from the middle window.
- Choose “Data Download”.
- The next stage will ask what area you would like to search for. Press the search button to use one of the search methods to find your area of interest. You can enter a place name, postcode, data tile name, national grid reference or easting/northing. Alternatively, you can click directly on the map and zoom in.
- When you have searched for the area you want, you have to specify the exact area that you wish to download. Use the zoom in/out, direction and centre tools to position the map, then use the “Step 1. Select Area” tools to drag a red box over the area you wish to download. Press Continue.
- “Step 2. Select Data”. Choose what information you would like to include in your map such as OS MasterMap, Backdrop mapping (raster maps), Land and Height Data (terrain/landform), Vector Data or Boundary & Location Data. “Add to Basket”.
- In the Basket, you can change the format for some datasets, e.g. for Vector Data (unfortunately not for OS MasterMap). GML requires the Interpose software to translate. If you choose SHAPE, you will be able to directly import your data into ArcGIS. If you are looking for data for CAD, choose DWG!
- You will then be sent a confirmation email to say that your order has been confirmed and is being processed. A second email will then be sent to say that your order is ready for download. Save and unzip the file (Right Mouse Click / Extract All in Windows Explorer).
Converting Digimap Mastermap files
Unfortunately, the OS Mastermap is only available in the GML format. You can convert GML files to either AutoCAD (.dwg) or GIS (.shp) files using the InterpOSe software. InterpOSe is available from CiCS and should be installed on all student computers in the landscape department. You can also download the software for your own computer here: http://www.dottedeyes.com/spatial_data_loading/interpose/digimap.php
- Open the InterpOSe software, On the title screen, press Next.
- In the Contents Order File dialog box, press the folder icon next to the address bar and navigate to your digimap download folder and choose the text file called Contents_Order. Press the next button twice.
- In the the Input Files dialog box, make sure that Process All Files is selected and press next.
- In the Output Format dialog box, choose which format you would like to covert it to such as ESRI Shape (.shp) and press Next. If you are converting to an AutoCAD file instead you will then be asked
- what version of AutoCAD you would like to convert it to. Choose a version and press Next.
- Press Next in the Output Table dialog box. You could change the selection if you need less/more datasets.
- In the Output Folder Dialog box, make sure the Folder for Output Files is set to somewhere you can easily find your file when they have been converted. Press Next. I recommend “One Set of Tables” as Output Structure.
- Press Next four times to skip through the next set of dialog boxes and then press Finish. InterpOSe should now convert your files and are now ready to be opened in GIS or CAD.
After importing it into ArcMap, please play around with the layers etc. For example, you might turn of all layers except “Topo_Area” which contains the land cover information we are most interested in. The other layers are mainly for labelling or they contain point heights.
There are now various ways to keep up to date with Digimap: EDINA Digimap Blog (http://edinadigimap.blogspot.com/) Facebook (http://www.facebook.com/EDINADigimap) Twitter (http://twitter.com/edina_digimap)
There is also a YouTube Channel for short videos on help with Digimap at http://www.youtube.com/user/EDINADigimap