Re: [Qlandkartegt-users] HELP - converting DEM files on Windows
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Re: [Qlandkartegt-users] HELP - converting DEM files on Windows
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From: Mitxel In <nod...@gm...> - 2015-02-22 21:09:00
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Sorry!! in the previous message there are some mistakes in the path notation (I have used */* , when for windows the correct one is *\* ) So, the correct sequence to execute in windows would be: gdalbuildvrt.exe C:\CARTO\DEM\portugal\portugal-hgt1sec.vrt C:\CARTO\DEM\portugal\*.hgt In addition, in windows you could get an error message similar to "unknown application". To solve this is necessary to set previously the environment path pointing to QlandkarteGT, and Gdal folders, and then execute the previous sequence from the Qlandkartegt folder: In windows you can do it as is shown in this example: path=%path%;"C:\Archivos de programa\QLandkarteGT\gdal\apps\";"C:\Archivos de programa \QLandkarteGT\gdal\";"C:\Archivos de programa\QLandkarteGT\" cd "C:\Archivos de programa\QLandkarteGT\" gdalbuildvrt.exe C:\CARTO\DEM\portugal\portugal-hgt1sec.vrt C:\CARTO\DEM\portugal\*.hgt (replace all the paths according to your folder structure) (you can tip it in the command line or place all the sequence in a *.bat file) ---- Mitxel 2015-02-22 20:16 GMT+01:00 Mitxel In <nod...@gm...>: > Hello RJ > > I think there is no need to convert your *.hgt files to TIFF > > Qlandkartegt can load the HGT files , so you can add HGT files as DEM for > your Freizeitkarte vectorial map and no conversion is needed. > > For Portugal you will get a set of 28 HGT files from viewfinder panoramas. > This could be a bit dificult to manage so you might want to build an unique > DEM file covering all your country. You can do this very easy with a gdal > virtual file (*.VRT) > > To do so: > > 1-download all the HGT files covering your area and put them in the same > folder ( eg: C:/CARTO/DEM/PORTUGAL) > 2- In a comand line go to the folder in wich gdalbuildvrt.exe is placed. > (eg in my windows: C:/Archivos de programa/QLandkarteGT/gdal/apps ) > 3- In the command line execute this: > > gdalbuildvrt.exe C:/CARTO/DEM/PORTUGAL/portugal-hgt1sec.vrt > C:/CARTO/DEM/PORTUGAL/*.hgt > > (replace the paths to the folders according to your folder structure) > > Doing so you will get a .VRT file named *portugal-hgt1sec.vrt* that > contain the link to all the hgt files in that folder. From now you can > manage this .vrt file as an unique DEM file and consencuently if you add it > to a map as aDEM you are bringing all the hgt files at once. > > This process to build the vrt files takes a few seconds. > > Note that if you have already installed the new Qmapshack you can do this > process more easy with the "build VRT" tool (menu tools-> Build VRT) > > ---- > For linux users: The process is the same. and as gdal will be installed > you can open a terminal in the folder you have the HGT files and execute > this: > > gdalbuildvrt portugal-hgt1sec.vrt *.hgt > > ------ > > Hope this helps > > Mitxel > > > > > 2015-02-21 20:27 GMT+01:00 RJ_ASUS <rj...@sa...>: > >> Hello to you all >> >> >> >> I'm a new QLandKarte (QL) user and I'm learning a lot from it. >> >> >> >> I'm looking for someone who can explain me how to convert DEM files (6 >> .hgt files I got from "Viewfinder *Panoramas"* for my country) into a >> single tiff file. >> >> >> >> I've read about that on QL archives, but all the explanations are for >> linux users. >> >> >> >> Having a Win 7 Home Premium x64 laptop, and version 1.8.0 of QL, I'm a >> little lost. >> >> >> >> I use the OSM "Freizeitkarte_PRT" map in QL >> >> >> >> So, given my current installation, which tools are there (if any) I could >> use and how, explicitly, to accomplish something like what I've found on >> >> >> >> >> http://sourceforge.net/p/qlandkartegt/qlandkartegt/Use_SRTM_data_as_Digital_Elevation_Model_%28DEM%29/ >> >> >> >> In the link above there is a mention to "Windows users: GDAL provides a >> shell. Use it". >> >> Can someone make a kind of a wiki for windows on this subject ? Probably >> I'm not the only one who could benefit from this. >> >> >> >> If someone need any further information, please send me an email. >> >> >> >> My QL win installation tree has the following structure >> >> >> >> >> >> Thanks >> >> >> >> RJ >> >> >> >> >> >> >> ------------------------------------------------------------------------------ >> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server >> from Actuate! Instantly Supercharge Your Business Reports and Dashboards >> with Interactivity, Sharing, Native Excel Exports, App Integration & more >> Get technology previously reserved for billion-dollar corporations, FREE >> >> http://pubads.g.doubleclick.net/gampad/clk?id=190641631&iu=/4140/ostg.clktrk >> _______________________________________________ >> Qlandkartegt-users mailing list >> Qla...@li... >> https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users >> >> > |