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EDINA Digimap

Content. Considerations in use of dataUnzip dataData formatsData conversionResourcesQ

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EDINA Digimap

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    2. Content Considerations in use of data Unzip data Data formats Data conversion Resources Q&A

    3. Considerations

    4. Content Considerations in use of data Unzip data Data formats Data conversion Resources

    5. Unzip Digimap data.zip files

    6. Unzip OS MasterMap data files

    7. GZip files Windows standard unzip will not work – try: Gzip, 7Zip, WinZip May not be necessary to unzip the GZip file, depending on conversion requirements

    8. Content Considerations in use of data Unzip data Data formats Data conversion Resources

    9. Data in Digimap – 2 types

    10. Raster data format Digimap raster data are supplied as TIFF files -mMost GIS or CAD software will accept TIFF image files, with no need for conversion. TFW files also supplied, which contain the geographic location of your TIFF files. Remember to keep the supplied TIFF files and the TFW files in the same folder! Otherwise your GIS software cannot locate the TIFF geographically.

    11. Vector data formats

    12. Vector data formats NTF (National Transfer Format) GML (Geography Mark-up Language) DXF (Drawing Exchange Format) SHP (ArcView Shapefile) MID/MIF (MapInfo export format) For more details on formats, see the EDINA guide ‘OS Collection: data formats and conversion guidance’: http://edina.ac.uk/digimap/support/training/

    13. MID/MIF format On Windows-systems, the .mid file is often recognized as a midi (music) file and doubleclicking on it usually opens some application like SoundRecorder or WinAmp, with predictable results. On Windows-systems, the .mid file is often recognized as a midi (music) file and doubleclicking on it usually opens some application like SoundRecorder or WinAmp, with predictable results.

    14. MID/MIF format

    15. TAB format MapInfo works with TAB (table) files; it is MapInfo’s native format. MID/MIF files are imported to MapInfo as TAB format. Necessary to name and specify a location for the new TAB file, when importing MID/MIF. Several component files are required to view a data set in MapInfo.

    16. TAB component files .DAT (The file which stores the attribute data. This usually a dBase III DBF file) .ID (Stores information linking graphic data to the database information) .MAP (Stores the graphic and geographic information needed to display a map on the users screen) .IND (Optional index files for tabular data. This is present if any fields are indexed) .TAB (The ASCII file which is the link between all other files and holds information about the type of data file)

    17. Content Considerations in use of data Unzip data Data formats Data conversion Resources

    18. NTF data Convert to MID/MIF format, using NTF2MIF

    19. NTF2MIF http://www.bodley.ox.ac.uk/users/nnj/translat.htm

    20. GML (MasterMap) data 2 options: Convert to MIF/MID format, using OSM2MIF convertor Convert to TAB format using InterpOse

    21. OSM2MIF http://www.bodley.ox.ac.uk/users/nnj/translat.htm

    22. InterpOse InterpOse Digimap edition - free download for GML data: http://www.dottedeyes.co.uk/spatial_data_loading/interpose/digimap.php Necessary to register first, with *******.ac.uk email address Converts GML data to TAB format

    23. GML (OS VectorMap Local) data Free download: http://www.rolta-europe.com/osvector.html Converts OS VectorMap Local to TAB format

    24. Content Considerations in use of data Unzip data Data formats Data conversion Resources

    25. Help pages

    26. Resources http://edina.ac.uk/digimap/support/training/ Available for you to download, edit and redistribute

    27. Resources Ordnance Survey website: General product information: http://www.ordnancesurvey.co.uk/oswebsite/products/ Guidance on software for use with OS MasterMap: http://www.ordnancesurvey.co.uk/oswebsite/products/osmastermap/information/technical/software.html

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