Questions tagged [dissolve]
To merge features based on specified attributes.
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Combine dissolve aggfunc and lambda function
I am looking to aggregate different polygons and applies analytical functions at the same time.
I have tried:
df.dissolve(by=['ville','arrondissement','quartier'],
aggfunc={'transaction':'count','...
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QGIS Native Dissolve only merges polygons vertically
I have a raster which I'm trying to convert into polygons. I have managed to convert them into polygons as seen below. All these polygons only have a value of 1 attached to them.
Now I want to merge ...
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Remove internal lines within merged polygon
I am having trouble removing internal lines from within a polygon. I have tried to dissolve, and to use the GRASS clean tool, but the data source has some inherent errors so it doesn't work. Any ideas?...
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Dissolve neighbour polygons when distance is below X meters
I like to dissolve polygons in QGIS which are separated by small gaps (streets or paths...). As shown in the picture below, the two polygons in the north should be dissolved, excluding the one in the ...
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Why are there so many slivers in my polygon shapefile?
I georeferenced a map and then traced a vector polygon shapefile over it, but when I dissolve it I am left with an enormous amount of slivers. All the vertices are snapped as far as I'm aware. What ...
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Model designer QGIS question - Function toggles
I just recently started using the model designer and I was wondering if anyone knows of a way to switch between the paths the process goes through. As in some kind of toggle that would allow us at the ...
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How do I merge/dissolve two polygons within one shapefile in QGIS?
I have a shapefile composed of many polygons. I want to merge/combine/dissolve some adjacent polygons that I have selected within the shapefile into one polygon without any slivers or lines left in ...
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Why new v.dissolve procedure generates new database tables and causes an error on adding columns later?
The new v.dissolve procedure includes, as the documentation states, two independent processes: v.reclass and v.extract, being a front end to those.
In my case when v.reclass is called it creates a new ...
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Dissolve only the smaller features among the larger ones
I want to dissolve features smaller than 1 ha among those larger than 1 ha. For example, if I have 2 features > 1ha and 1 feature < 1 ha, at the end of this process I would like to have 1 ...
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Python Geopandas: Dissolve function does not dissolve overlapping polygons
I have developed a Python program using GeoPandas to handle overlapping polygons. The program first dissolves these overlapping polygons and then applies an overlay operation (specifically, ...
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QGIS 3.22.16 Layout: how the Atlas displays only one ID at the time on the map
I am using QGIS 3.22.16. My goal is to create maps for each Tree ID. I used the Atlas tool and dissolved the tree layer. However, the atlas shows several ID trees on the same map (like Atlas image). ...
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GeoPandas Dissolve takes long time to execute
I have a dataframe in GeoPandas Python. The data frame contains around 3800 rows (geometry type is Multiplygon). Some polygons are overlapping each other. I want to dissolve those overlap. I used ...
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Achieving ArcGIS Dissolve result with GeoTools
I want to merge two or more adjacent lines (within a XY tolerance) to one line. The result from Dissolve in ArcGIS is what I aim for.
How can I do that in GeoTools?
See figure below.
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Achieving ArcGIS Dissolve result with PostGIS
I want to merge two or more adjacent lines (within a XY tolerance) to one line. The result from Dissolve in ArcGIS is what I aim for.
How can I do that in PostGIS?
See figure below.
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Merging features on the same ID but other attributes combined [closed]
I have a layer with data:
ID | Attribute1 | Attribute2
1 x b
2 x c
3 y d
4 y e
5 z f
I want to dissolve ...
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