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I make a raster file from LiDAR .las files in SAGA. The CRS of .las is Slovenian National Grid. Then, I export it as GeoTiff (Import/Export - GDAL/OGR - Export GeoTiff). When I import it into QGIS (Project CRS is Slovenian National Grid) I get error CRS was undefined - and it sets it up to Project CRS. Almost everything is fine - Raster correlates with satellite image. It is just that I get little skewed raster. For example, when I try to do map through qgis2web I get this black bands at top and bottom:

enter image description here

What am I doing wrong?

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I think I cracked it. I get skewed raster if my Project CRS is set up as Slovenian National Grid.

If I set it up as WGS84 and import Tif Raster it gives me error and sets up raster CRS to WGS84. That puts tif in the middle of Atlantic. But if I then, correct project CRS back to Slovenian National Grid and also Raster CRS - raster is not skewed and in right position.

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    Settings -> Options -> CRS -> CRS for new layers should be set to Prompt for CRS. Then you can assign the projection if it can not be read from the source file. Raster -> Projection -> Assign Projection does basically the same. For the black stripe: Use the identify tool to get the pixel value, and set that as additional nodata value.
    – AndreJ
    Commented May 4, 2016 at 16:05
  • I think i figured out. As i open open Layers plugin and add Google satellite it changes my Project CRS to WGS 84 Mercator. If i put it back to SNG, everything is ok. But black stripe still persist in qgis2web plugin.
    – Jost Hobic
    Commented May 4, 2016 at 16:20

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