Although not the answer to your question, another route is Patrick Warren's 3d to qgis (not arcgis) plug in
https://github.com/patrickbwarren/qgis3-survex-import Andrew -- Sent with K-9 Mail On 7 July 2023 08:25:40 BST, Xavier Robert <xavier.rob...@univ-grenoble-alpes.fr> wrote: >Hi Bill, > >I do not really understand why to export survey stations as a geotiff file >(raster, image). Survey stations are points (vectors) and are more easier to >manage through GIS softwares as shapefiles (vector format). This is the >Therion ESRI output. > >In the ESRI output folder, you have several shapefiles in 2D (exported as map) >and in 3D (exported as model): outline, areas, lines, areas, points, shots3d, >stations3d (several files for each shapefile). > >Stations3d contains all the stations of the survey… >The points shapefile should also contain the points station. See the attribut >table associated to this file and use that to select the points you want to >plot. > > >For one of my main project, I wanted to produce a clean georeferenced map with >: >the survey with a rendering depending on the zoom used, >at important zoom, the stations with their altitude, >and overlays as OSM, Geology, hillshade, altitude contours,… > >We used that in a QGIS project that we coupled with the Merging Maps app. This >is still in development, but that permits to do field prospection with all the >cave database and GPS positioning on your phone. > > >Unfortunately, the direct ESRI Therion output is not clean enough to produce >such GIS maps. I needed to write Python scripts to : >add the stations and entrances altitude as a new column in the attribute table, >cut the lines and areas shapefiles to keep only what is inside the outline >(expect for the option clip off); Before running this script, I often need to >test the validity of the polygons shapefiles to make sure that they are valid… >We also make some svg symbols corresponding to symbols used by Therion, but >this is not yet complete. (If someone has already a svg symbols library for >therion shp, I am interested !) > >For those interested, this is now partially included in the Samoëns cave >repository : https://github.com/robertxa/Topographies-Samoens_Folly (written >mostly in French) >To make the GIS files, I run the « SamoensGIS.thconfig ». After compiling >Therion files, it calls Python scripts (edit the .thconfig to check if the >lines are not commented) that are in Samoens-GIS/Scripts >(https://github.com/robertxa/Topographies-Samoens_Folly/tree/master/Samoens-GIS/Scripts). > The whole QGIS project is not uploaded on GitHub as some files are to big for >Github. But I can share it on demand. > >For now, this is still a bit dirty (and still dedicated to this project, you >will need numerous changes to apply it to an other project), I am still >working on this. If you try it, if you miss a specific file, if you have any >questions or suggestions/improvements, etc. do not hesitate to contact me ! > >Cheers, > >Xavier > > >> Le 7 juil. 2023 à 02:01, Bill Gee <b...@campercaver.net> a écrit : >> >> A question has come up from one of my caver friends who is very new to cave >> survey but an old hand at ArcGIS and various other ESRI tools. He earns a >> living as a GIS expert. >> >> He would like to get a georeferenced TIFF (GeoTIFF) which includes GPS >> coordinates of survey stations. I looked at the KML file produced by >> Therion and find no references to survey stations. A KML file is really >> just a long (very long!) list of GPS coordinates, so it probably could >> include survey stations. >> >> So my question for the group: Is there a way to produce a GeoTIFF file >> which includes survey stations? >> >> Related question: Do the ESRI outputs from Therion include survey stations? >> >> Thanks! >> -- >> =============== >> Bill Gee _______________________________________________ Therion mailing list Therion@speleo.sk https://mailman.speleo.sk/listinfo/therion
