Questions tagged [qgis]

QGIS is a cross-platform GIS application licensed under the GNU General Public License.

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Point connection in QGIS [closed]

I have to connect points to a polygon. I tried to use "points to path" and "point connector" plugins in QGIS, but neither of them are working. For testing, I just drew 4 points and used "points to ...
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2answers
798 views

Zonal stats for two polygon layers: calculate proportion of feature cover within polygons

In order to calculate land cover diversity within defined patches, I need the coverage proportion of each landcover type for each patch. So I am searching for something similar to the zonal stats tool ...
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0answers
285 views

Memory issue? qgis python processing does not complete

I have a simple process to make some edits to all the contour files in a directory. It runs fine on the test of 100 odd files but in a directory with about 500 it stops after about 120 files. Is ...
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1answer
202 views

PostGIS intersect query: Raster footprints of multiple high resolution GeoTIFF's or not? [closed]

I have multiple (381) high resolution GeoTIFF's (2x2 meter resolution, 1 band, 700 MB each) that I somehow want to upload to a PostGIS-server to be able to run ST_intersects or ST_3Dintersects queries ...
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1answer
351 views

Is possible to create a new column of QGIS?

I want to create a new column according to the column A & column B. Column A 1 2 3 Column B A B C New Column 1:A 2:B 3:C How can I do that in QGIS?
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1answer
2k views

Receiving GDAL Clipper Error from QGIS? [duplicate]

I realise there has been quite a lot of discussion on this topic and have already read through the suggestions on this forum of how to rectify this problem, but still nothing has worked. I am ...
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1answer
286 views

How to add a buffer in QGIS that updates itself [duplicate]

I wish to add a buffer into project that will update the buffer fields when new points/ polygons are added into the project
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1answer
120 views

QGis Lines around points

Im my QGis project there are points representing oil wells and sysmic 2D lines. I'd like to know how many lines are there 1 Km around each well, for example.
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1answer
833 views

QGIS and Python - create line with multiple points in postgis [closed]

How can I create a line, with Python functions, with many points that are records in PostGIS?
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1answer
2k views

Making Map Matching Points to Roads [duplicate]

I'm having some trouble while map matching these points for some streets. Could you lend me a hand?