Swiss lidar.

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prof....@gmail.com

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Apr 15, 2021, 4:31:03 PM4/15/21

to LAStools - efficient tools for LiDAR processing

I just downloaded the lidar for Zurich, and the latest version of lastools. My command line and the response from las2las are below. Did you have any issues with the files you downloaded? My command line is below, and I have attached lasinfo from the orignal file, and the output from las2las which did not work.

c:\microdem\lastools\bin\las2las.exe -i C:\Users\pguth\Downloads\zurich_lidar\swisssurface3d_2018_2676-1248_2056_5728.las\2676_1248.las -o C:\Users\pguth\Downloads\zurich_lidar\swisssurface3d_2018_2676-1248_2056_5728.las\2676_1248_utm.las -target_meter -target_utm 32N -epsg 2056
ERROR: unit 9110 not known
ERROR: unit 9110 not known
ERROR: unit 9201 not known
ERROR: unit 9001 not known
get_ProjectedCSTypeGeoKey: look-up for UTM zone 32 and ellipsoid with id 3 not implemented
get_geo_keys_from_projection for generic projection not implemented

florian...@gmail.com

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Apr 16, 2021, 7:45:28 AM4/16/21

to LAStools - efficient tools for LiDAR processing

Hi,

You can perform this transformation (ch1903+ to UTM32N) with Geosuite (free usage since March 2021): https://www.swisstopo.admin.ch/de/geodata/applications/geosoftware/geosuite.html.

Within the software go to tools > batch transformer > add the files you want to transform(only .las supported) > Add the module Reframe and the desired transformation (UTM32N is a possible output).

I don't think EPSG 2056 is defined in lastools. Should the transformation be added to lastools here are the equations: https://www.swisstopo.admin.ch/content/swisstopo-internet/de/topics/survey/reference-frames/height-transformations/_jcr_content/contentPar/tabs/items/dokumente_und_publik/tabPar/downloadlist/downloadItems/607_1466088462833.download/refsys_d.pdf

Hope it helps

Cheers

Florian

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