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Digimap – Data Download 19 November 2014 Guy McGarva, EDINA Geo User Support Vivienne Mayo, EDINA User Support
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Data Download Categories of data How to use Issues for users: Unzipping Formats Tile sizes Copyright and Resources Content
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Digimap OS Collection Roam – view, annotate, print OS maps at a range of fixed scales Data Download – download OS mapping data for use in GIS/CAD
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Roam Search, scale bar, overlays, annotate, measure, change basemap Save & open maps, Print, Map Content, Map Info.
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Data Download All available OS map data in Data Download Download several map products in one order 5 categories of map data 3 steps to order map data
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Data Download Click + or on category name to open and see available map data products: OS MasterMap – most detailed topographic mapping of GB, transport network map data Background Mapping – raster maps at range of scales, all in TIFF format Land and Height data – contours and Digital Terrain Models Vector data – range of scales and formats Boundary and Location data – administrative boundaries, postcode data, gazetteers
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Available datasets and dates http://digimap.edina.ac.u k/webhelp/os/data_infor mation/os_data_issues/o s_update_dates.htm# http://digimap.edina.ac.u k/webhelp/os/data_infor mation/os_data_issues/o s_update_dates.htm#
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1. OS MasterMap Vector map product, most detailed mapping available of GB. Topography layer – GML, DWG and File Geodatabase formats. Building Heights data added in 2014. CSV or KML format. Integrated Transport Network layer – GML format only. Change Only updates available.
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2. Backdrop mapping 9 products available. Raster maps – useful as backdrop. TIFF image format. Largest scale at top, 1:1000. MiniScale smallest scale – 1:1000000. Click Info for information box.
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2. Backdrop mapping Information box displays: – Scale, version, format availability, data allowance, tile size and Terms of use. – Click Show Grid to display the tiles on map.
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3. Land and Height data OS Terrain 50 most up to date. OS Terrain 5 coming soon, part of new licence agreement. Will replace PROFILE. DTM? Digital Terrain Model, useful for 3D modelling of terrain. Formats vary between products.
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4. Vector Data Largest scale - VectorMap Local 1:10000. Smallest scale - Strategi, 1:250000 Formats vary between products, e.g.: – Vector Map Local – GML, DWG, SHP – Strategi – SHP, DXF, TAB, NTF, MIFMID Tile sizes: – Strategi, Meridian 2 National – get all of GB – Vector Map District - 100x100km tiles
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5. Boundary and Location Data Boundary-Line - administrative boundaries e.g. counties, unitary authorities, electoral areas. Shape format. Code-Point – coordinates for postcodes, boundaries for postcodes. CSV, NTF (Code-Point). Shape, MIF- MID (Code-Point Polygons). OS Locator – gazetteer of road names. CSV. 1:50000 Scale Gazetteer, place name database, 260,000 entries. CSV. Outlines - National Grid square outlines, GB National outlines – Shape, MIFMID, DXF.
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Using Data Download 3 step process: 1.Select area 2.Choose maps 3.Add to basket – Options to change format, version and layers
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Basket options Select version, format and layers in the basket. Options vary between map data products.
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Some issues for Digimap users Unzipping – all data is provided in a zip archive file. Sometimes data is zipped within the zip archive! Formats – getting the right format Tile sizes - map data products are provided in different tile sizes
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Unzip standard Digimap zip files You will download 1 zip archive file for each order you place in Data Download Use the standard Windows unzip facility to unzip and extract the file contents to a location on your computer
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Unzip standard Digimap zip files Zip archive file contents: Sub-folder for each map product in your order Citations and contents text documents at top level
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Sub-folder contents Within each sub-folder, data files and conditions of use text file. Data from Digimap OS is covered by the Digimap licence OR the OS OpenData licence. So each data folder has a conditions document that specifies which conditions apply. NOTE: for some products, the map data will be zipped in the sub-folder. Image of Vector Map District data. Check before you try to add it to your software!
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Data formats FormatCompatibility DXF, DWGDrawing Exchange, or Drawing, format, AutoCAD File GeodatabaseArcGIS, QGIS MIF/MIDMapInfo format NTFNational Transfer format, non-proprietary. Older format, developed in 1990s. GMLGeography Markup Language, non-proprietary SHPShape file, ArcGIS format TIFFTIFF image format, used for background mapping products.
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Formats and conversion guidance http://digimap.edina.ac.uk/webhelp/os/data_information/data_formats/new_data_translators.htm
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TIFF files Raster data (backdrop mapping) all supplied in TIFF image format, with a TFW file TIFF World Files contains location, scale and rotation of TIFF map. Keep in same folder as TIFF files!
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Shape files ArcGIS format, can be used in other software too. Remember to keep all constituent parts together - SHP, DBF, SHX, PRJ. Image of folder containing VectorMap Local shape files
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Tile sizes Map data from Digimap is typically provided in tiles that have been referenced to the British National Grid - exceptions are OS MasterMap vector data, gazetteers, products provided with national coverage such as Boundary-Line. Data from Digimap is in a range of sizes, from 1 x 1 km tiles to 100 x 100 km tiles. Typically the more detailed the map data, the smaller the tile size, e.g.: ProductTile size 1:50000 raster20 x 20 km 1:250000 raster10 x 10km Vector Map Local 1:10000 5 x 5km Vector Map District 1:50000 100 x 100 km
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Merging tiles Where tiles are provided in smaller sizes, e.g. 5 x 5 km, possible to merge them into one Image: OS Terrain contours in ArcMap, for area of South East England
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Clipping tiles Where tiles are provided in large sizes e.g. 100 x 100 km, possible to clip them to smaller area Image: Vector Map District clipped to smaller area in ArcMap
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Publication You can publish Licensed Data and materials which contain Licensed Data Subject to some restrictions which are detailed in the Licence Includes various publications Copyright acknowledgement required: © Crown Copyright and Database Right [insert date]. Ordnance Survey (Digimap Licence) – Copyright acknowledgement is included on all maps printed from Digimap Collections. – Remember to include copyright acknowledgement if you download data from Digimap and create maps!
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Sharing Licensed Data You may only share Licensed Data with: – other Authorised Users – Public Sector Mapping Agreement (PSMA) members – One Scotland Mapping Agreement (OSMA) members – Sponsors who have their own licence for the same data (type and coverage) Sponsored research: – Results must be published widely and immediately – Hard copy plots can be supplied to sponsors – DATA cannot be supplied to sponsors – Excludes Research Council funded research centres with their own Ordnance Survey licence e.g.: Institute of Hydrology British Geological Survey
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Support with copyright Lists of Frequently Asked Questions: http://digimap.edina.ac.uk/webhelp/digimapsupport/access/licence_ag reements.htm Your site representative: http://digimap.edina.ac.uk/webhelp/digimapsupport/service_info/site_r ep_list.htm EDINA Help Desk: edina@ed.ac.uk 0131 650 3302
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Resources Digimap Resource centre – access help pages, guides, FAQs, videos, case studies and more.
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