Wednesday 17 June 2009

ShareGeo for Sharing Data

Have you created geospatial data for your research project or teaching module?
If so, why not put it in ShareGeo and share it with other Digimap users?

ShareGeo is a facility in Digimap where users can share and re-use geospatial data, whether they have been derived from exiting Digimap data or created entirely from scratch.

Why should I put my data in ShareGeo?

  • increase the visibility of your research
  • share datasets easily with colleagues and peers
  • create a record of your data with simple metadata
  • manage your data for future use
Also, you will:

  • find datasets you may be interested in
  • save time by re-using existing data that others have created
What's new in ShareGeo?

New datasets available in ShareGeo include: UK Digital Terrain Model (DEM), UK National Parks boundaries, Government Office Regions, Strategic Health Authority boundaries and many others.

A full list of all datasets in ShareGeo can be found here.

How do I access ShareGeo?

ShareGeo can be accessed by logging in to Digimap and following the link on the Collections page to ShareGeo. http://edina.ac.uk/digimap/

More information about ShareGeo can be found at: http://edina.ac.uk/projects/sharegeo/index.shtml

Let us know what you think about ShareGeo by sending an email to: mailto:edina@ed.ac.uk?subject=ShareGeo

Monday 8 June 2009

Forthcoming changes to Digimap

The current version of Digimap's Classic facility (available through the Ordnance Survey Collection) is currently undergoing both a facelift and some reconstruction work!


Later this year we will be introducing "slippy" maps (drag the map with your mouse to move it around) and some new ways of saving your maps and producing printed copies. The new facility will offer the same maps and the same functions as those currently available but will be easier and more intuitive to use. Everyday use of online mapping technology has grown dramatically since the current version of Classic was released. Users' familiarity with online mapping has increased and there are now common expectations of how map services online should work. The current re-engineering aims to accommodate these changes and build a service which meets those expectations.

Although this is still work in progress, below is a sneak preview of how the new version might look.


EDINA will operate both new and existing versions of this facility in parallel to ensure that a smooth transition is made between them. If you have teaching materials or help pages which are currently based on the existing version, there will be plenty of time to update them before the existing version of Classic is withdrawn.

Survey for Support Staff

EDINA is undertaking a survey to understand more about support for online geospatial resources, spatial data, GIS and related software. We would like to learn more about what support and training is currently available, what is useful and what might be provided to improve the support available.

If you have any kind of support role with respect to spatial data, GIS, CAD or geospatial resources we would be grateful if you would complete the following survey and would pass it on to others who are also involved in supporting users of all things geospatial.

The survey link is here: http://tinyurl.com/geosupportsurvey

The survey will remain open and available until TUESDAY 23 JUNE 2009.

This is NOT a service-specific survey, so anyone involved in supporting users of geospatial data and resources has something valuable to contribute. Please pass it on. Gathering feedback is a challenging task, so your efforts to complete these questions is very much appreciated.

The survey should take around 20 minutes to complete and the majority of questions are multiple choice checkboxes. There will be a prize draw for four £25 Amazon vouchers. Please enter your name and email address at the end of the survey if you wish to be entered into the draw.

Many thanks for your time.

Wednesday 3 June 2009

What do you know about postcodes?

There is a lot to know about UK postcodes! Here are some interesting key facts:

  • There are around 2 million postcodes in the UK, covering something like 29 million addresses.

  • A postcode is made up of four constituent parts. Take the postcode EH9 1PR as an example:

    • The postcode Area is indicated by the initial one or two letters: EH
    • The post District is indicated by the one or two numbers following the Area: EH9
    • The postcode Sector is indicated by the number after the District: EH9 1
    • The postcode Unit is indicated by the full postcode: EH9 1PR

  • Some buildings can contain delivery addresses with different postcodes. High-rise residential buildings are a good example of these. As far as the Code-Point dataset is concerned these are called Vertical Streets, and their boundaries are recorded as regular squares. These are clearly visible when the postcode boundaries are mapped.

  • Usually postcodes cover around 15 delivery addresses, although this isn't a hard and fast rule.

  • Some postcodes apply to only one address or building. Ordnance Survey's postcode is SO16 4GU. Buckingham Palace also has it's own postcode, SW1A 1AA, and 10 Downing Street's postcode is SW1A 2AA. The House of Commons is SW1A 0AA

  • Postcode unit boundaries (which form the OS Code-Point Polygons dataset) are mathematically calculated around a centroid and are not based on physical boundaries visible on the ground. This centroid is calculated using the coordinates for the delivery points in each postcode. These are not necessarily the precise geographic coordinats of the letterbox in your front door!

  • The Code-Point dataset offered through Digimap provides much more information than just the postcode and the coordinates of it's centroid. Additional information includes the NHS Region code, Ward name, how many delivery addresses are in that postcode, how many of those are domestic or business delivery points. The range of information given is different for Scotland from England and Wales.

  • These enable you to link additional information to the postcode if it is already associated with a code common to the postcode dataset e.g. you can identify which postcodes are associated with data you have collected using Ward codes.

  • You can use Digimap's Postcode Query facility (in the Ordnance Survey Collection) to look up the additional information about a particular postcode.

  • You can use Digimap's Boundary Download facility to download the Code-Point data and the associated polygons.