clipgeoprocessingqgis
I have a vector line 'straten' shapefile which I want to have cliped based on raster shapefile "Luchtfoto 2016". Because some streets are running out of tmy raster, I want to have the vector cliped.
I know this in Arcgis but not in QGIS. How can I do this?
Yes I can easily deleted the shapes that run out of the raster, but some lines are just too long and only consists of one segment.
I would recommend using Minimum Bounding Geometry (Data Management) followed by Clip (Data Management) with the clipping geometry option or Extract by Mask (Spatial Analyst).
This looks like a problem with your polygon layer rather than the tool itself. Using the files you supplied, I encounter the same issue. There appears to be one feature, but multiple entries in the table. Running a number of different tools, the processing log often spits out Feature n has invalid geometry. Skipping...
I can't make sense of what's wrong with this layer.
Solution:
Rather than dig into the details of the layer itself, I just ran Fixed distance buffer with a Distance of 0. Using this new vector layer as your mask layer should work just fine.
Updated Solution:
I revisited this out of curiosity, and those empty features were the problem. As the features have no actual geometry to them, they're the reason you get the "...without a geometry" error message.
Selecting by expression $area IS NULL and then deleting left the table with one feature, the polygon we're masking with. The raster was then able to be clipped using the original shapefile.
Best Answer
I would probably do the following:
Use the Raster Calculator on your "Luchtfoto2016":
And use the following expression:
This will save a new raster with all cells equal to zero (this should dramatically speed up the next step).
Use the Polygonize tool on your newly saved raster to convert it to a polygon:
Use the Clip tool on your line layer with the new polygon layer.