ordnance survey data download

Digimap Collections

• Download Ordnance Survey data:– Which OS map data products are available?

– How to download:• OS data from the Data Download facility

– MasterMap Download

– Digimap OpenStream

– Onward use of data – Resources

Data download services

• Users can download a wide range of OS map data products in Data Download

• MasterMap Download is for OS MasterMap data in GML (vector) format

• Boundary Download provides OS Code-Point (postcode data) and OS Boundary-Line

• From early 2013, everything will be available in Data Download

How often is data updated?

• Image of 1:25000 scale raster updated in July (OS creation date May 2012)• Used to be one annual update - now update data more regularly• Data Download offers different versions• MasterMap GML data – September and May• MasterMap raster data – created annually

Available datasets and dates

• http://digimap.edina.ac.uk/webhelp/os/data_information/os_data_issues/os_update_dates.htm#

2 types of map data

• Vector map data allows identification or individual features.

• Range of vector formats available, not consistent over all map products. Some formats may require conversion to use in GIS/CAD.

• Raster data all in TIFF image format (you cannot select individual features in raster maps).

Data Download products

Data download products

Data Download products

MasterMap Download

• Ordnance Survey have 4 layers of MasterMap data (Topography, Imagery, ITN and Address Layer - Digimap offers two of these layers:

• Topography layer– 9 themes

• Integrated Transport Network (ITN) layer

MasterMap Download

• Most detailed mapping available of GB

• Scale 1:1250 to 1:10000

• Widely used by architects and planners

OS MasterMap Topography data

http://www.ordnancesurvey.co.uk/oswebsite/products/os-mastermap/index.html

MasterMap ITN data

http://www.ordnancesurvey.co.uk/oswebsite/products/os-mastermap/index.html

Boundary Download products

•Code-Point – postcode listings or postcode polygons

•Boundary lines – e.g. counties, unitary authorities, electoral areas

•National GB boundaries

Code-Point

•Code-Point provides listings of postcodes, with their geographical coordinates and other associated information.

Code-Point

• Code-Point data, on 1:10000 Scale Raster background

•Available in CSV or NTF format

Code-Point Polygons

• Code-Point polygons are post-code boundaries

• Image shows Code-Point data and Code-Point Polygons, on 1:10000 Scale Raster background

•Available in SHP or MIF/MID format

OS Boundary-Line

• Image shows all available boundary types• Different data provided depending on format selected. For SHP and

MIF/MID format – select boundary type, then you are given those boundaries for all of GB.

OS Boundary-Line

• NTF format – select your region (county, urban authority, electoral area), then you are given all available boundaries for that region.

Boundary lines sample

•Raster map of Edinburgh

•Scotland constituency boundary lines overlaid

1:50000 Scale Gazetteer

• All place name searches in Digimap use the OS 1: 50000 Scale Gazetteer

• Same database that is used on the Landranger Maps

• Download entire database in Data Download (approx. 250,000 entries)

Gazetteer Plus

• Download selected place name records in Gazetteer Plus

• Limit search by any combination of place name, feature type, coordinates.

• Download a file that can be used to place point data on maps.

Digimap Collections






Data Download

• All steps to download data on one screen• Allows for selection of multiple data products in one order• Can select the version of the data you prefer, e.g. 2011, 2012• MasterMap Download and Boundary Download will eventually be

incorporated into Data Download

Data Download

• Step 1 – Select area• Step 2 – Select data• Step 3 – Add to

Basket

Data Download

Options

• Some map data products have more than Format option or Version• Change the default selections within your Basket:

Preview Area

• Receive all intersecting National Grid tile covering the selected area

• Likely to receive data for a larger area than the one selected

• Each map data product information box tells you its tile size

• National Grid tile sizes:– 1 x 1 km, 5 x 5 km, 10 x

10 km, 20 x 20 km, 100 x 100 km

Link to collect data

Collect data

Exercise

• Access Data Download• Download data for area around the City of York

– 1:1000 MasterMap raster– 1:25000 raster, April 2011 version– Profile DTM, TIFF format– VectorMap District, SHP format

What area?

What do I download?

• Download zip file• Unzip to access

the data

What do I download?

• Citations text file• Contents text file• Separate folder for each map product you ordered

What do I download?

• Note the conditions of use text file. Data from Digimap OS is covered by the Digimap licence OR the OS OpenData licence. So each separate data folder has a conditions document that specifies which conditions apply for that map data product.

• http://www.ordnancesurvey.co.uk/oswebsite/opendata/docs/os-opendata-licence.pdf

What do I download?

• Shape files – one for each layer e.g. buildings, boundaries• Note there are other files with same name – keep these in same

folder!

What do I download?

• TIFF files• You will find TFW or TAB files in the same folder. These

contain the geographic coordinates – keep in same folder

Formats

• MasterMap GML format. NOTE: MasterMap is also available in raster format from Data Download.

• NTF format – National Transfer format – may require conversion.

• Shape file format – ArcGIS format. Also compatible with many other CAD and GIS software.

• MIF/MID format – MapInfo format.• TIFF – raster image format. Straightforward to use in

GIS and CAD.• DXF – CAD Drawing Exchange Format.

Import data to

software

What do I do with the data?

Download data file

1. Unzip the Digimap data file

2. Conversion may be required

Help available from:•Digimap help pages •Digimap YouTube•eLearning units •ArcGIS help pages•Other software help pages

Process the data

Create a map and/or

analyse map data

Digimap Collections






MasterMap download

• Why is there a separate MasterMap download?– Historical - the old Data

Download facility could not cope with MasterMap vector data

– Additional security requested by Ordnance Survey

– Allow delivery of Change only updates

• MasterMap vector data will shortly be available via Data Download

MasterMap Download

MasterMap Download - Steps:

1. Select the required data layer and themes2. Search for your location3. Select location from search results4. Refine area if required5. Review download request summary6. Set download options 7. Retrieve data from Your Account

– Select Layer – Topography or ITN– Choose Themes

1. Select data layer and theme(s)

Your Account

Your Account has a full order history

Can re-order current data,

original data or a change-only update

Unzip MasterMap data files

• GZ (GZip) file included in MasterMap download zip file

• GML data file within the GZ file• Depending on how data is used, may need to

remove GML data file from GZ file (use 7Zip, Gzip, WinZip…)

Unzip MasterMap data files

• MasterMap download folder contents, after extracting GML file

Digimap Collections




– Digimap OpenStream– Resources

Digimap OpenStream

Digimap OpenStream

• Free service to academic community – NOT just for Digimap registered users

• Allows users to stream certain OS datasets directly to their software without downloading and storing large quantities of data

• Digimap OpenStream provides access to the following OS OpenData products:– MiniScale® – 1:250,000 Scale Colour Raster– OS Vector Map™ District (Raster)– OS Street View®

• http://openstream.edina.ac.uk/terms

Training & Support Resources

Digimap OS Collection Help

• Get help with formats, conversion requirements, conversion tools, viewing and styling data in GIS/CAD

Elearning modules

YouTube

Ordnance Survey

• Ordnance Survey website:

http://www.ordnancesurvey.co.uk/oswebsite/products/

ordnance survey data download

Education