edina digimap’s os collection: boundary download vivienne carr james crone
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Digimap Training Workshops
Meeting content
• Digimap’s OS Collection Data Download Services
• Digimap’s OS Collection Boundary Download:– What’s available?
• Code-point
• Code-point Polygons
• OS Boundary Line
• GB National Boundaries and GB National Grids
– Onward use of data
• Unzip data files
• Data formats & conversion
– Desktop sharing
Digimap Training Workshops
Meeting content
• Digimap’s OS Collection Data Download Services
• Digimap’s OS Collection Boundary Download:– What’s available?
• Code-point
• Code-point Polygons
• OS Boundary Line
• GB National Boundaries and GB National Grids
– Onward use of data
• Unzip data files
• Data formats & conversion
– Desktop sharing
Digimap Training Workshops
Data Download Services
• Data Download• MasterMap Download• Boundary Download• Gazetteer Download• Gazetteer Plus
Digimap Training Workshops
OS Products available
http://www.edina.ac.uk/digimap/description/products/
Digimap Training Workshops
Meeting content
• Digimap’s OS Collection Data Download Services
• Digimap’s OS Collection Boundary Download:
– What’s available?
• Code-point
• Code-point Polygons
• OS Boundary Line
• GB National Boundaries and GB National Grids
– Onward use of data
• Unzip data files
• Data formats & conversion
– Desktop sharing
Digimap Training Workshops
Boundary Download Home Page
• OS Code-Point – postcode listings or postcode polygons
• OS Boundary lines – e.g. counties, unitary authorities, electoral areas
• National GB boundaries
Digimap Training Workshops
Date of last updates by OS
• Code-Point, March 2009• Boundary Line:
– April 2009, NTF format– May 2009, other formats
• Put into Digimap service in September 2009
Digimap Training Workshops
Meeting content
• Digimap’s OS Collection Data Download Services
• Digimap’s OS Collection Boundary Download:
– What’s available?
• Code-point
• Code-point Polygons
• OS Boundary Line
• GB National Boundaries and GB National Grids
– Onward use of data
• Unzip data files
• Data formats & conversion
– Desktop sharing
Digimap Training Workshops
Code-Point
• OS Code-Point: National Grid co-ordinates for a point within each postcode unit in Great Britain
• OS Code-Point Polygons: Digital postcode unit boundaries
• Available at area level (e.g. AB, CF) or district level (AB1, AB2 etc). District level not available in NTF format.
Digimap Training Workshops
Code-Point at Area level
• Can select up to 5 postal areas• Vertical streets included in area files
Digimap Training Workshops
Code-Point at District level
• Then select the districts of interest• Separate vertical street file provided for entire area, when you download district
files
Digimap Training Workshops
Code-Point data
• Also provided: NHS region, NHS authority, County, District, Ward, Postcode Type
Digimap Training Workshops
Code-Point Polygons
• Code-Point data and Code-Point Polygons, on 1:10000 Scale Raster background
Digimap Training Workshops
Meeting content
• Digimap’s OS Collection Data Download Services
• Digimap’s OS Collection Boundary Download:
– What’s available?
• Code-point
• Code-point Polygons
• OS Boundary Line
• GB National Boundaries and GB National Grids
– Onward use of data
• Unzip data files
• Data formats & conversion
– Desktop Sharing
Digimap Training Workshops
Boundary Line
• Available: County, European constituencies, Greater London Authority, Metropolitan districts, Scottish parliamentary electoral region, Unitary Authorities, Westminster constituencies, Extent of the realm
• Boundary datasets for use with census datasets, available in UKBORDERS: http://edina.ac.uk/ukborders/
Digimap Training Workshops
OS Boundary Line – SHP or MIF/MID
• Select boundary type > Receive one chosen boundary type for all areas
Digimap Training Workshops
OS Boundary Line - NTF
• Select area > Receive all boundary types for one area
Digimap Training Workshops
Boundary Line
• Scotland and Wales Constituencies, 1:25000 Raster background of Edinburgh area
Digimap Training Workshops
Boundary Line
• Greater London Constituencies, labelled, 1:25000 Raster background
Digimap Training Workshops
Meeting content
• Digimap’s OS Collection Data Download Services
• Digimap’s OS Collection Boundary Download:
– What’s available?
• Code-point
• Code-point Polygons
• OS Boundary Line
• GB National Boundaries and GB National Grids
– Onward use of data
• Unzip data files
• Data formats & conversion
– Desktop sharing
Digimap Training Workshops
GB National Boundaries & Grids
• National Boundaries have been derived from Ordnance Survey’s Strategi data
• National Grids have been created by Ordnance Survey
Digimap Training Workshops
Meeting content
• Digimap’s OS Collection Data Download Services
• Digimap’s OS Collection Boundary Download:
– What’s available?
• Code-point
• Code-point Polygons
• OS Boundary Line
• GB National Boundaries and GB National Grids
– Onward use of data
• Unzip data files
• Data formats & conversion
– Desktop sharing
Digimap Training Workshops
Unzip process
1. Data.zip
2. Unzip Data.zip:
1. Contents.txt,2. Conditions.tx
t,3. Data files
Digimap Training Workshops
Meeting content
• Digimap’s OS Collection Data Download Services
• Digimap’s OS Collection Boundary Download:
– What’s available?
• Code-point
• Code-point Polygons
• OS Boundary Line
• GB National Boundaries and GB National Grids
– Onward use of data
• Unzip data files
• Data formats & conversion
– Desktop sharing
Digimap Training Workshops
Data formats
• CSV – Comma Separated Values
• DXF – Drawing Exchange Format
• SHP – ArcView Shapefile
• MIF/MID – Map Info Interchange format
• NTF – National Transfer Format
Digimap Training Workshops
CSV format
• Necessary to convert a CSV file to a DBF 4 file, prior to import to ArcGIS
• Can do this in MS Office 2003, but not in MS Office 2007– A possible workaround is to open the CSV file
with Open Office, then save as DBF
Digimap Training Workshops
Shape files
• Shape files do not require any conversion prior to use in ArcGIS
• Remember to keep all files together - SHP, PRJ, DBF, SHX:
Digimap Training Workshops
NTF format
• Conversion will be required before use in ArcGIS
• ESRI Productivity Suite (ArcGIS V9.2 or later) – this must be requested from CHEST separately, via your institutional CHEST representative.
• Map Manager (ArcGIS V9.1 or earlier)
• Either of these tools can be used to convert NTF files to ESRI Personal Geodatabase format
Digimap Training Workshops
Meeting content
• Digimap’s OS Collection Data Download Services
• Digimap’s OS Collection Boundary Download:
– What’s available?
• Code-point
• Code-point Polygons
• OS Boundary Line
• GB National Boundaries and GB National Grids
– Onward use of data
• Unzip data files
• Data formats & conversion
– Desktop sharing
Digimap Training Workshops
Resources
• Digimap OS Collection Help pages – Boundary Download:– Download instructions– Code-Point and Code-Point Polygons user guides– Using NTF data with ArcGIS v3.x– Using NTF data with ArcGIS v9.x
• EDINA Training guides:http://edina.ac.uk/digimap/support/training/
• Ordnance Survey website:– General product information:http://www.ordnancesurvey.co.uk/oswebsite/products/
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