Presentation on theme: "Using data from Digimap in ArcGIS"— Presentation transcript:
1 Using data from Digimap in ArcGIS What OS data is available in Digimap?How do I unzip and convert the data for ArcGIS?What is ArcGIS?Styling optionsDigimap OpenStreamOther resources
2 Data in Digimap – what’s available? Range of OS map data:Backdrop mapsLand & height dataVector dataPlace name and road name databasesMasterMap vector data, GML formatAdministrative boundaries and postcode data
8 MasterMap Download Most detailed mapping available of GB Scale 1:1250 to 1:10000Widely used by architects and plannersNOTE: MasterMap Download provides vector format MasterMap. Raster format MasterMap is available in Data Download.Topography Layer is a detailed, intelligent, geographic database. It contains almost half a billion features from the built and natural landscape of Britain.Detailed and surveyed to a high degree of accuracy, the Topography Layer is continually revised to incorporate changes to the urban and rural environment. It consists of nine themes: land area classifications; buildings; roads, tracks and paths; rail; water; terrain and height; heritage and antiquities; structures; and administrative boundaries.The ITN Layer is a detailed, accurate and up-to-date digital dataset consisting of a Roads Network theme and a Road Routing Information (RRI) theme for Great Britain.The Roads Network contains road categories, from motorways and primary routes to named and unnamed minor roads and local streets.RRI contains features such as height, weight and width restrictions; traffic calming; turn restrictions; and one-way roads as well as vehicular access and time restrictions.Other OS Layers – not available within DigimapAddress LayerThe most complete national address dataset for the whole of Great Britain.Imagery LayerThe OS MasterMap Imagery Layer is a maintained dataset of high-quality aerial photography and provides a detailed aerial map of Great Britain.
9 MasterMap DownloadOrdnance Survey have 4 layers of MasterMap data (Topography, Imagery, ITN and Address Layer)Digimap offers two of these layers:Topography layerIntegrated Transport Network (ITN) layer
10 Boundary Download products Code-Point – postcode listings or postcode polygonsBoundary lines – e.g. counties, unitary authorities, electoral areasNational GB boundariesCode-Point consists of two separate elements, Code-Point itself and Code-Point polygons:Code Point provides a National Grid reference for each unit postcode in Great Britain. Multiple postcodes in a single block of flats or offices will share one National Grid reference. With each co-ordinated point there is information about the postal delivery points within the postcode unit and codes for a number of administrative boundaries, which coincide with the postcode unit. It is Code-Point that is used in Digimap when a postcode search is entered to locate a map.Code-Point polygons represent postcode unit boundaries in Great Britain. The boundaries are derived from ADDRESS-POINT®, an Ordnance Survey product which provides a National Grid co-ordinate for each postal delivery address in Great Britain. Each postcode unit boundary is created to surround all addresses with the same postcode. Where appropriate, the boundaries follow major roads, railways, rivers and Royal Mail postcode sector boundaries. Often, tower blocks or similar buildings will be assigned with more than one postcode. Such buildings are called vertical streets and are represented in the polygon dataset as small squares. A separate look-up table links postcodes to vertical streets using a unique vertical street reference code. Some postcode units are omitted from the dataset, due to issues of accuracy or because they are PO boxes (i.e. non-geographic postcodes). These are listed in separate tables, included with the Code-Point polygons.Boundary-Line is the key dataset of administrative and voting boundaries in Great Britain. Available in NTF, SHP and MIF / MID formats. Differences in the download for different formats:The NTF files available for download are divided by area. There are individual NTF files for each County, Unitary authority and European Region of Great Britain. NTF files for each County and Unitary Authority contain all the boundaries for all the other datasets within them. These datasets will vary depending on the country that the area is in.Shape and MID/MIF files have Great Britain wide coverage for each boundary type; e.g. A Shapefile of all the European Regions or a MID/MIF file of all the Westminster Parliamentary Constituencies.CountyCounty Electoral DivisionsDistrict Borough Unitary AuthorityDistrict Borough Unitary Authority WardsEuropean RegionsGreater London ConstituenciesScotland and Wales ConstituenciesUnitary Authority Electoral DivisionsWestminster Constituencies
11 Code-PointCode-point data, on 1:10000 Scale Raster background
12 Code-Point PolygonsCode-Point data and Code-Point Polygons, on 1:10000 Scale Raster background
14 Using data from Digimap in ArcGIS What OS data is available in Digimap?How do I unzip and convert the data for ArcGIS?What is ArcGIS?Styling optionsDigimap OpenStreamOther resources
15 How do I use this data in ArcGIS? 1. Downloaddata from Digimap (zip file)Unzip data fileConvert the data to a format compatible with your software - if necessary2. Processthe data3. Import datatoArcGIS4. Analyse data /Createmap
16 Unzipping standard Digimap zip files Use the standard Windows unzip facility:
18 Unzip MasterMap zip files Data is delivered in GZip file - GML data within the GzipCan extract the GML file from the Gzip file…not always necessary to do this
19 Data in Digimap - what formats? GMLTIFF, SHP, NTF, GML, MIF/MID, DXF, CSV, ASCSHP, NTF, CSV, MIF/MID
20 Data in Digimap – what formats? Some products are available in more than one format, e.g. Strategi is available in NTF, DXF, SHP and MID/MIF
21 What formats are compatible with ArcGIS? Raster data products are available in TIFF formatCompatible with ArcGIS
22 What formats are compatible with ArcGIS? TIFF World files - contain the location, scale, and rotation of a map that is stored as a TIFF image.Remember to keep the supplied TIFF files and the TFW files in the same folder! Otherwise your GIS software cannot locate the TIFF geographically.
23 What formats are compatible with ArcGIS? Shape files do not require any conversion prior to use in ArcGIS.Remember to keep all constituent parts together - SHP, DBF, SHX:
24 What formats are incompatible with ArcGIS? NTF:OS Land-Form Profile – convert to ESRI GeodatabaseOS Land-Form Panorama – convert to ESRI GeodatabaseOS Meridian 2 – SHP files availableOS Strategi – SHP files availableOS Code-Point – CSV files availableOS Boundary Line – SHP files availableGML: OS MasterMap, OS VectorMap Local
25 Converted file for use in ArcGIS Original file from Digimap NTF dataConvert to ESRI Personal Geodatabase format (.MDB suffix), using Productivity Suite or Map Manager (ESRI tools).Converted file for use in ArcGISOriginal file from Digimap
26 Productivity Suite, NTF Convertor Available through Eduserv CHEST:ESRI Productivity Suite (ArcGIS V9.2 or later)Map Manager (ArcGIS V9.1 or earlier)
27 2 data products are in GML format: OS MasterMap data GML data2 data products are in GML format:OS MasterMap dataOS VectorMap Local dataIt is possible to import GML/GZ files to ArcMap 10. However, in our experience it is trickier to isolate features, analyse the data, change the style when using this method. We recommend that you convert the data if possible.
28 OS MasterMap conversion Possibilities:Convert to ESRI Geodatabase format using Productivity Suite (ArcGIS V9.2 or later) or Map Manager (ArcGIS V9.1 or earlier)Convert to Shapefile format using InterpOse
29 Productivity Suite, OS MasterMap Data Convertor Available through Eduserv CHEST:ESRI Productivity Suite (ArcGIS V9.2 or later)Map Manager (ArcGIS V9.1 or earlier)
30 OS MasterMap Convertor Converts OS MasterMap data to ESRI Personal Geodatabase formatAccepts GZip files for conversion
31 InterpOse Digimap edition Free download, which converts MasterMap GML data to SHP file format (and various other formats)InterpOse accepts GZip files for conversion
32 OS VectorMap Local conversion Free download:Converts OS VectorMap Local to Shape file formatAccepts GZip files
33 Gazetteer data – available in Data Download Delivered in CSV fileSaved as DBF IV, using Excel 2003N.B. DBF IV option not available in Office 2010 – try Open Office spreadsheet
34 Using data from Digimap in ArcGIS What data is available in Digimap?How can I use this in ArcGIS?What is ArcGIS?Styling optionsDigimap OpenStreamOther resources
35 What is ArcGIS? Desktop Geographic Information System 3 levels of licenseApplications within license:ArcMap explore/analyse data and make maps. ArcCatalog data management ArcToolbox™ tools for data/spatial analysis
36 ArcMap Table of contents – view data layers Map display panel Toolbar – open ArcCatalog and ArcToolbox hereTable of contents – view data layersMap display panel
37 Using data from Digimap in ArcGIS What data is available in Digimap?How can I use this in ArcGIS?What is ArcGIS?Styling optionsDigimap OpenStreamOther resources
38 Appearance of vector data MasterMap data viewed in ArcMapVector data (e.g. OS MasterMap, OS VectorMap Local) will not have the same appearance as it does in Digimap, when initially added to ArcMap
39 Appearance of vector data Possible to apply style (or symbology) files to the data, to replicate the Digimap style
40 Symbology, or style, files InterpOse – provide style files for use with ArcGIS and MapInfo, which can be installed to your computer on setup of InterpOseRolta - provide style files with the installationProductivity Suite, Map Manager – style files suppliedEDINA supply style files for several data products – find these in the Help pages.
41 EDINA Symbology, or style, files OS data:MasterMap, Strategi, Land-form Panorama, Meridian, Land-Line – in Help under Using data with ArcGIS 9.xGeology Digimap – bundled with data download file. 1 avl file for each Shape file.Marine Digimap – download Fonts files and Style file from Marine Digimap Help pages and copy into relevant folders in C:/Program Files.
42 Using data from Digimap in ArcGIS What data is available in Digimap?How can I use this in ArcGIS?What is ArcGIS?Styling optionsDigimap OpenStreamOther resources
44 Digimap OpenStream Free service to anyone with .ac.uk email address Must register to use the serviceAllows users to stream certain OS data sets directly to their software without downloading and storing large quantities of dataDigimap OpenStream provides access to the following OS OpenData products:MiniScale®1:250,000 Scale Colour RasterOS Vector Map™ District (Raster)OS Street View®