10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing CE Applied Communications Technology Openstreetmap GPS and mapping

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Convergent Technologies F In the ‘old days’ each type of communication was separate. TV used analogue TV signals Music was played on vinyl records or tapes Pictures were printed on paper Radio used different bandwidth and needed a different device Telephones needed separate wiring F Convergence of technologies has occurred. –Most data is in digital format –And can be transmitted over a single network

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Geographical Information Systems (GIS) F GIS present disparate information in a ‘Visual’ format F Details include –Location ( co-ordinates ) –Points of interests ( hotels, petrol stations, shops etc ) –Land usage ( roads, Pathways, Fields, Forest buildings ) –Geology (rock types, –Statistical analysis ( population densities, distributions ) –Boundary information ( Countries, Counties.. Land registry )

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing GIS F Several layers are used to display several different types of data. F Each layer has a file that contains some appropriate information F Files are XML type text files. F This makes it flexible but complex

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Example File Format - -

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Complex files - Shape Files F.shp — shape format; the feature geometry itself F.shx — shape index format; a positional index of the feature geometry to allow seeking forwards and backwards quickly F.dbf — attribute format; columnar attributes for each shape, in dBase IV format (!) F Optional files : –.prj — projection format; the coordinate system and projection information, a plain text file describing the projection using well-known text formatwell-known text –.sbn and.sbx — a spatial index of the featuresspatial index –.fbn and.fbx — a spatial index of the features for shapefiles that are read-only –.ain and.aih — an attribute index of the active fields in a table or a theme's attribute table –.ixs — a geocoding index for read-write shapefiles –.mxs — a geocoding index for read-write shapefiles (ODB format) –.atx — an attribute index for the.dbf file in the form of shapefile.columnname.atx (ArcGIS 8 and later) –.shp.xml — geospatial metadata in XML format, such as ISO or other schemasgeospatial metadataISO 19115schemas –.cpg — used to specify the code page (only for.dbf) for identifying the character encoding to be usedcode pagecharacter encoding Source -

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing OGC standard F Source - Open Geospacial Consortium (OGC) agree ‘industry Standards’ Complex pieces of software

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Layered Views F Google Maps is not just one map and you zoom in and out F It is several maps all at different scales, plus data overlays –Each map image level is made up of a series of square tiles –The details displayed on each tile vary (depending on the scale) Eg when looking at a map of the whole of the UK the individual houses seen at the most detailed levels are not displayed –Tiles are ‘Rendered’. Takes time and a lot of processing power If you change something maybe next day before change available

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Google Maps and KML F The overlay information for Google Maps uses KML F The Keyhole Mark-up Language is now a standard F New York City New York City , , 0

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Images are layered

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Tiles format F Format –Raster Scan digital image represented by reducible and enlargeable grids –Vector scan features as geometrical shapes. E.g points, Lines, polygons

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Mapping Applications F Google Maps is a well known example of an application using convergent technologies; Vector maps Traffic data Images of locations –Satellite images –Street view –Displayed over the web as a “Web 2.0” RIA (using AJAX)

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Google My Tracks F My Tracks records path, speed, distance, and elevation while you travel outdoors. F While recording, you can view your data live, annotate your path, and hear periodic voice announcements of your progress. F My Tracks can sync via Google Drive. F Easily export tracks to Google Maps.

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Orux Maps F Great app for offline maps F But difficult to use if you’re colourblind…

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing OpenStreetMap F Openstreetmap is another mapping application, quite similar but all open-source (

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing OpenStreetMap

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Adding to OpenStreetMap F Five stages to adding to OpenStreetMap –Recording a track with GPS (VisualGPSce) –Uploading a track to OpenStreetMap Server –Create /Edit data on OpenStreetMap JOSM –Uploading the data file back to OpenStreetMap –Rendering the map tiles F Beginners Guide to OpenStreetMap – F Stoke Site Campus Map – F Google Maps data to GPX can be done (for example:

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Maps on your Mobile device While you can use Google maps on you mobile – it costs to download the images Why not store maps directly on your device? Mobile Atlas creator allows this to be done Use ORUXmaps app to display them on an Android device.

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Mobile Atlas Creator F Mobile Atlas Creator ( –Tutorial F Try –Openstreetmap Mapnik –Openstreetmap public Transport –Ordinance Survey Explorer maps UK –Google maps –Google Earth –KML information:

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Panoramic Images using tiled image technology F Interesting Camera work – ee c2b4b06233chttp://gigapan.org/viewGigapanFullscreen.php?auth=033ef 14483ee c2b4b06233c F You can do it too.. – –

10/09/2015 E.R.Edwards 10/09/2015 Staffordshire University School of Computing Tutorial F Check out GIS on the internet (Check out: F OpenStreetMap –Read beginners guide –Create an account –Attempt to generate a track F Mobile Atlas creator –Create your own offline atlas