On Fri, Oct 4, 2019 at 8:16 AM Bill Ricker <bill.n1...@gmail.com> wrote:
> I would also be interested in how to use LAZ files with OSM tools or other > FLOSS tools. > (I note there's an open tool to uncompress LAZ to LAS.) > I see some tutorials for extracting buildings, but I'm interested in > traces of former land-use - finding artificial linear ground features under > the foliage. > I use QGIS with LAS files. I haven't used it but https://laszip.org/ tools should help with the conversion from laz to las. Once I have the lidar loaded, roads and other features can be traced into either a geojson or shapefile for loading into JOSM. QGIS isn't as easy as iD or JOSM to draw features but adequate for most purposes. I did see a presentation on using ML for extracting buildings and other objects from Lidar. They were able to not only do an excellent job of extracting buildings but could also extract high voltage power lines. The company rep that gave the presentation does flights over high voltage power lines to check for vegetation growth that may require trimming. Best, Clifford -- @osm_washington www.snowandsnow.us OpenStreetMap: Maps with a human touch
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