Digimap – Data Download
Ordnance Survey Collection
11 November 2015
Ian Holmes, EDINA Geo User Support
Content
• Data Download
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Overview of available map data
Ordering map data with the data download services
Contents of your download file
Support resources on using data in GIS/CAD
• Issues and tips:
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Using Roam to identify map products
Unzipping
Formats
Tile sizes
Overview of available map data
Ordnance Survey Collection
• Almost all OS products including (Open and Licensed
Data)
• Including:
– MasterMap Topography Layer (most detailed GB mapping
available)
– Terrain 50 and Terrain 5 (DTM and contour datasets)
– 1:25,000 and 1:50,000 scale rasters (outdoor leisure maps)
– Code-Point with Polygons – postcode boundaries
– Building Height Attribute – heighted building dataset
(alpha release)
Digimap OS Collection
Roam: view,
annotate, print maps
at a range of fixed
scales
Data Download:
download mapping
data for use in
GIS/CAD
Data Download
• Download several
map products in
one order
• Map data grouped
in to categories
• 3 steps to order
map data:
1. Select Area
2. Select Data
3. Add to Basket
Data Download Categories
Click + or on category name to open and see
available map data products:
• OS MasterMap – most detailed topographic
mapping of GB, transport network, building
heights, important sites
• Background Mapping – raster maps at range of
scales, all in TIFF format
• Land and Height Data – contours and Digital
Terrain Models (DTMs)
• Vector Data – range of scales and formats
• Boundary and Location Data – administrative
boundaries, postcode data, gazetteers, Points of
Interest
• Withdrawn Datasets – datasets no longer
updated by Ordnance Survey but still available
1. OS MasterMap
Vector map product(s), most detailed mapping
available of GB:
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Integrated Transport Network layers – GML
format only.
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Sites Layer – polygon dataset of important sites
e.g. schools, health centres etc.
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Topography layer – most detailed mapping:
GML, DWG and File Geodatabase formats.
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Building Heights data added in 2014. CSV or
KML format.
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Scotland’s Greenspace Map – based on
Topography Layer
OS MasterMap Topography Layer
OS MasterMap Topography Layer:
Building Height Attribute
2. Backdrop Mapping
Raster map products – useful as backdrop
• 10 products available
• All in TIFF image format
• Largest scale at top, 1:1000
• GB Overview smallest scale – 1:1000000
1:25,000 Colour Raster
1:50,000 Colour Raster
3. Land and Height data
• OS Terrain 5 and Terrain 50 most up to date
• Digital Terrain Models (DTMs) useful for 3D
modelling of terrain
• Formats vary between products;
PANORAMA available in native CAD formats
• PROFILE still available in ‘Withdrawn
Datasets’ section, which is also available in
CAD formats
OS Terrain 50 (contours)
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
5. Boundary and Location Data
• Points of Interest – point locations of
services and facilities
• Boundary-Line – administrative
boundaries e.g. counties, unitary
authorities, electoral areas
• Code-Point – postcode centroid
coordinates and polygons (Code-Point
with Polygons)
• OS Locator – gazetteer of road names.
CSV.
• OS Open Names, 1:50,000 Scale
Gazetteer – place name databases
• Grid Squares and Outlines - National
Grid square and outlines for GB
6. Withdrawn Datasets
Datasets no longer updated by
Ordnance Survey but still available
through Digimap
Using Data Download
3 step process:
1. Select area
2. Choose data
3. Add to basket
– Options to change
format, version and
layers
Product Information and availability grids
Product Information:
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Scale, version, format availability,
data allowance, tile size and
Terms of use
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Click Show Overlay to display
availability grid on map
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Click More Info to view help page
specific to the product
Availability Grids:
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Display availability and tile boundaries of each product
Basket options
Dataset options:
• Version – dataset version as released by Ordnance Survey
• Format – note different datasets available in different formats
• Theme – some datasets are available in different styles e.g. full colour and line
drawing
• Layers – use this to download some features from the full dataset, e.g. just building
features from OS MasterMap Topography Layer
Data formats
Format
Compatibility
DXF, DWG
CAD drawing formats
File Geodatabase
ArcGIS, QGIS
MIF/MID
MapInfo format
NTF
National Transfer format, non-proprietary. Older format,
developed in 1990s.
GML
Geography Markup Language, non-proprietary
SHP
Shape file, ArcGIS format but can be read by most GIS
applications including AutoCAD Map 3D
TIFF
TIFF image format, used for background mapping products
http://digimap.edina.ac.uk/webhelp/os/osdigimaphelp.htm#data_information/data_formats/formats_available.htm
Email notifications
• 1st email acknowledges receipt of order
• 2nd email when data is ready to download
– Length of time to extract data depends on extents and
data format selected
Data available to download for
3 days, but can re-order at any
point using ‘My Previous
Downloads’ button
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
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
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!
Issues and tips
• Using Roam to identify map products
• Formats – getting the right format
• Tile sizes - map data products are provided in different tile sizes
Using Roam to identify map products
Map Information panel
shows name of the
current map product
Formats and conversion guidance
http://digimap.edina.ac.uk/webhelp/os/osdigimaphelp.htm#data_information/data_formats/new_data_translators.htm
List of available formats
http://digimap.edina.ac.uk/webhelp/os/osdigimaphelp.htm#data_information/data_formats/formats_available.htm
Tile sizes
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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.
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Data from Digimap is in a range of sizes, from 1
x 1 km tiles to 100 x 100 km tiles.
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Typically the more detailed the map data, the
smaller the tile size, e.g.:
Product
Tile size
1:50000 raster
20 x 20 km
1:250000 raster
10 x 10km
Vector Map Local 5 x 5km
1:10000
Vector Map
District 1:50000
100 x 100 km
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
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
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!
Shape files
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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
Available datasets and dates
http://digimap.edina.ac.uk/webhelp/os/osdigimaphelp.htm#data_information/os_data_issues/os_update_dates.htm
Support Resources
• Digimap Resource Centre:
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http://digimap.edina.ac.uk/webhelp/resources/index.html
Guides
FAQs
Videos
Case Studies
• GIS/CAD help pages:
– http://digimap.edina.ac.uk/webhelp/digimapgis/index.htm
• Live chat facility, during office hours
• Email/Telephone support:
– edina@ed.ac.uk
– 0131 650 3302
Overview of available map data
Environment Collection
• Data from Centre for Ecology and Hydrology (CEH)
• Land Cover Maps of Great Britain and Northern
Ireland
– 2007
– 2000
– 1990
• Vector and raster formats
Overview of available map data
Geology Collection
• Data from British Geological Survey (BGS)
• Offshore geology
• Onshore geology from 1:10,000 to 1:625,000 scale
• Soil parent material
• Superficial deposit thickness
• Onshore borehole index
• Geological indicators of flooding
Overview of available map data
Historic Collection
• Historic OS mapping dating back to 1846 from
Landmark Information Group
• County Series maps published between 1846 and
1969
• National Grid maps published between 1943 and
1996
• Selected Town Plan maps published between 1848
and 1939
Overview of available map data
Marine Collection
• Data from SeaZone Solutions Ltd.
• HydroSpatial One - authoritative vector digital
marine mapping data
• Hydroview Charts - raster GeoTiff UK Admiralty
Charts at various scales (not for navigational use)
Questions
• Ask us anything!