John, That looks like a great tutorial for what you want to do with digitizing old railways.
Bernie. On Fri, Nov 15, 2024, 1:10 a.m. John W. Blue via QGIS-User < qgis-user@lists.osgeo.org> wrote: > Bernie, > > Thank you for the suggestion. > > As I was checking out the plugins I did see "Quick Maps" and thought of > the same workflow but have not tried it yet. My only hesitation at the > time was wanting to be able to mark the old roadbed as trail. With some > more google searching today I found: > > https://ultrajourneys.org/digitizing-trails-in-qgis/ > > Have not attempted to follow the tutorial so if you know of a better one > all ears. Marking an old roadbed as a trail and getting that trail into a > GPX format is the ultimate goal here. > > Thanks! > > John > > > From: Bernie Connors [mailto:bernie.conn...@unb.ca] > Sent: Wednesday, November 13, 2024 9:03 PM > To: John W. Blue > Cc: qgis-user@lists.osgeo.org > Subject: Re: [Qgis-user] USGS 3DEM question: export to kml/kmz > > Here is a suggestion. Keep the USGS DEM tif in QGIS and symbolize it as a > hillshade. It will be very easy to spot abandoned railways in the > hillshade. Then use the Quick Maps plugin to add the Google Satellite map > to QGIS. You can easily switch back and forth between Google Satellite > layer and the USGS DEM hillshade. > > Cheers, > Bernie. > On Wed, Nov 13, 2024, 10:11 p.m. John W. Blue via QGIS-User < > qgis-user@lists.osgeo.org> wrote: > Thanks for the file composition info. > > Using that I was able to convert the downloaded 3DEM .tif from a raster to > vector using Raster > Conversion > Polygonize (Raster to Vector) option. > The resultant exported .kml file size was almost 1 Gb and while Google > earth was to load it, it was nothing but a white square. > > I did find that Raster > Analysis > Hillshade was able to produce some > remarkable and useable results. What is strange is that the conversion of > the hillshade raster to vector .kml never completes. It quickly gets to 7% > and then seemly stalls out. > > Am I not waiting long enough? > > John > > > > From: oisin.kelly.w...@gmail.com [mailto:oisin.kelly.w...@gmail.com] > Sent: Tuesday, November 12, 2024 3:01 PM > To: John W. Blue > Cc: qgis-user@lists.osgeo.org > Subject: Re: [Qgis-user] USGS 3DEM question: export to kml/kmz > > The tif file is a raster. > Kml is a vector format. > You need to use one of the processing tools to extract contours or spot > heights and then export the results to kml. > Get BlueMail for Android > On 12 Nov 2024, at 20:06, "John W. Blue via QGIS-User" < > qgis-user@lists.osgeo.org> wrote: > Hello, > > QGIS newbie here. I want to use USGS LiDAR to search for abandoned > railroad grades as a layer in Google Earth. > > I am able to download the 1 meter tif from USGS and I am able to add it as > a layer in QGIS. I cannot, however, figure out how export the layer as a > kml/kmz file. > > I right-click on the layer and choose “Export” and then “Save As” followed > by dropping the “Format” menu down. Heaps and heaps of options to choose > from but none for kml/kmz. > > Any help in what I am missing or doing wrong would be appreciated. > > John > ________________________________________ > > QGIS-User mailing list > QGIS-User@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > _______________________________________________ > QGIS-User mailing list > QGIS-User@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > _______________________________________________ > QGIS-User mailing list > QGIS-User@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >
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