Many thanks Lene and Nick, this worked a treat. Combined with the Google Satellite basemap, imported using the fantastic 'OpenLayers' plugin, this is just what I needed. Many thanks for your help. Best wishes, Des
-----Original Message----- From: qgis-user-boun...@lists.osgeo.org [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Nick Hopton Sent: 23 April 2012 11:04 To: qgis-user@lists.osgeo.org Subject: [Qgis-user] Re: GPX, OS Grid References and Google Earth Hi Des, just to add a lttle to what Lene wrote. As mentioned, import the GPX file to QGIS, then save it as a EPSG:27700 projected shapefile. To do this right-click on the GPX file in the layers panel, go 'Save As...' and set 'Format' to 'ESRI Shapefile'. Set the CRS for the new shapefile by clicking to the right of 'CRS', and picking 'Selected CRS', then press the 'Browse' button. In the window that appears enter '27700' (without the quotes) in the 'Filter' field. Highlight 'OSGB 1936 / British National Grid' in the list below and press 'OK'. Then give the new shapefile a name and click 'OK'. Next, load the new shapefile into QGIS, right-click on it in the layers panel and go 'Set Project CRS from Layer'. You can now add OS grid coordinates to the shapefile's attribute table. To do this, highlight the layer in the layers panel and (from the top menu bar) go Vector -> Geometry Tools -> Export/Add geometry columns. All you need to do here is tick 'Save to new shapefile', give the new file a name and press 'OK'. Now load the new shapefile and have a look at the attribute table (right-click on the layer in the layers panel and go 'Open Attribute Table'). You should find that it contains two new columns, one for OS eastings (x-ordinates) and the other for northings (y-ordinates). The ordinates form OS grid coordinates, not grid references (ie. SD4568798345 will be shown as 345687 498345, for example). QGIS doesn't know about Ordnance Survey grid references I'm afraid, but if this is a problem then come back. Nick. -- View this message in context: http://osgeo-org.1560.n6.nabble.com/GPX-OS-Grid-References-and-Google-Earth- tp4907061p4909729.html Sent from the Quantum GIS - User mailing list archive at Nabble.com. _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.1913 / Virus Database: 2411/4953 - Release Date: 04/22/12 _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
