Extracting elevation profile from CSV containing XYZ data

Question

I am new to GIS software.

I have XYZ data in a text file (delimited text). The data is XY in 1m spacing, approx. 12km x 900m of data.

I want to find the elevation profile from a XY path.

In QGIS, i have managed to remove bulk of the unnecessary points to help reduce the time required for interpolation.

I tried using the profile tool to use an existing layer (a line I made), but the program stops responding instead of showing some process bar.

Do I need to do some TIN interpolation before trying to profile tool it again?

Convert your XYZ to a faster format, I suggest either Erdas Imagine (driver HFA, extension .img) or GeoTIFF. As it is regular spacing you shouldn't need to TIN the data but if direct conversion is problematic have a read of gis.stackexchange.com/questions/376582/… and gis.stackexchange.com/questions/150291/… for more in depth instructions. — Michael Stimson, Commented Apr 28, 2023 at 3:14

MariusK · Accepted Answer · 2023-04-28 10:22:13Z

0

You should first convert you point grid to a raster format using the Rasterize (vector to raster) tool. Then you can use the Profile Tool plugin to create the profile, as explained here: QGIS Profile Tool - Terrain Profile

answered Apr 28, 2023 at 10:22

MariusK

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