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Working (albeit cumbersome) solution to convert KML-/KMZ-files with <gx:Track>-Extension to gpx/csv/tcx, via Googles MyTracks-App. I tried to import a .kmz-file to QGIS, containing a GPS-track as <gx:track>-Element. (Track was recorded with MyTracks-App on Android. I only had the .kmz.) After numerous attempts, using various tools ...


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You need ST_Difference which returns the the geometry of a feature that does not intersect with another feature. In your case something like this: SELECT l.id, ST_Difference(l.geom, p.wkb_geometry) As diff_geom FROM lines l, polygons p Modify for your actual table and field names.


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You don't have one polygon, you have many. It looks like the xy coords from all polygons are just dumped into one large list to make a single polygon. Hence the polygon boundary is jumping around creating bad topology. As the above commenters say, your question is poor. But, taking a guess: if you only want one polygon merge your data together prior to ...


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Load your KML in to New MyMaps and you can print in friendly versions. If you have your route loaded you will be able to print. example


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I have run into the same problem using QGIS today. Whilst I appreciate that it's late to answer I thought this might help. My KML (WGS84) layers, which were exported from an OSGB (ESPG:27700) Shapefile were all offset to WSW by 3 - 5 Metres. I managed to work around this by exporting to GeoJSON (WGS84) and then exporting the GeoJSON layer to KML format. ...



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