im using a special system to do geomagnetic surveys. Its software let me output the information as image files, ASCII or in its own proprietary file format. Now i want to get its information in my GIS (using QGIS) I can of course import the exported image files but i would love to import the raw data to play arround with the visualisation a bit more. not depending on the original software.
The files look like this:
X Y Messwert 995.00 1000.00 0.00 995.00 1000.05 0.14 995.00 1000.10 0.28 995.00 1000.15 -0.07 995.00 1000.20 -0.42 995.00 1000.25 -1.26 995.00 1000.30 -2.17
and so on..... (looooong file ;) )
Every 0.05 cm movement on X and Y contains a data value, positive and negative. I want to convert this data into a raster file, a pixel for every data value. My goal is to tune the visualisastion comparable to a DEM tiff file in my qGIS project, without having the problem to export this through the original software everytime.
What would be the best way to do this? I think gdal is the program to use i need some help. Perhaps there is even a way to do this in qgis? Thanks for any help!
So i finally imported a fraction of my Data, sorting everything to Y. Saving everything as tiff wasnt a problem as well. Now my next step was to get this spacialy correct data (interms of lenght) into my project. the coordinates in the file is just a local project oriented coordinate system.
Georeferencing the created tiff wasnt a big problem but it results in a little annoying problem. after georeferencing my perfect square gets rotatet a bit. resulting in big nodata areas. My data also contains positive as well as negative data and even zero is important.
I couldnt find a way to get this nodata area to disappear, qgis georeferencing gives it a value that is contained in the data areas as well. if i set this to transparency my raster files gets some annoying holes.