Questions tagged [overlay]
A spatial operation in which two or more maps or layers registered to a common coordinate system are superimposed, either digitally or on a transparent material, for the purpose of showing the relationships between features that occupy the same geographic space.
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Clean up polygon after difference tool QGIS
So I'm using the difference tool in QGIS to remove a bunch of areas from a polygon representing a state. Problem is, these areas don't fit together perfectly, and the result looks very messy.
How can ...
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Does geopandas overlay use spatial indexing
I have a general question about geopandas overlay method. I want to know whether it already uses spatial indexing or not.
If not, how would I apply indexing?
Background I do an intersection with ...
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Overlay TIFF raster and "Shape" file a free library in C#?
Is there any free C# library to get the elevation data for the vertices of a 2D line feature Shape file form a raster tiff file?
The "Elevation" column in the attribute table of "...
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"Extract by Expression" works manually, but not in model [duplicate]
I have a QGIS project (v 3.34.0) where I run a model to calculate distances from all building facades to the nearest road. The last step in the model is to extract only those line features (the ...
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Eliminate any pixel of a GeoTIFF that does not intersect with the geometry/feature in OpenLayers?
As shown in the below posted code, I am trying to overlay particular geomerty/feature with a GeoTIFF, the code posted below succeeded in achieving that. However, as shown in the below posted screen-...
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How to sum assigned scores of multiple rasters into an output raster in Raster Calculator
I'm using ArcGIS Pro. I have multiple rasters, each representing a water quality characteristic. I assigned a score for each characteristic. A couple rasters have different scores. I want to overlay ...
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Overlay problem when importing a CSV file into QGIS
I'm having a problem with certain entities being superimposed when importing a delimited text file in .csv format into QGIS.
It seems that some entities lose their coordinates and copy the coordinates ...
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Potential surface water based on slope degrees - QGIS
I have two sets of raster data that I would like to combine but under a condition. I have derived a slope raster from my DEM, and I have already classified it based on slope values in my AOI (degrees) ...
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Overlay TIFF with raster layer
I am using QGIS 3.23.3-Lima.
Input files TIFF: 12 TIFF files with species abundance data (output
of a species distribution model)
Input file shape: Esri shapefile with the 12 biogeorgions.
Aim: One ...
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GeoDataFrame.overlay parallelization with multiprocessing
I'm trying to speed up the calculation of the intersection between two geodataframes with multiprocessing. I'm using GeoPandas with JupyterLab from Anaconda on Linux.
My multiprocessing code currently ...
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How to obtain superimposed colors from 3 raster RGB in QGIS
I have 3 separate raster layers with binary values (1/0).
By assigning the 3 primary RGB colors to each of the layers, I would like to obtain a representation that expresses the overlap of the layers ...
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What is the right way to dissolve vector features in GRASS GIS on attribute values of one column summarizing or averaging others?
The line product of v.overlay contains a column with zones number and a stack of other attributes.
What I want:
Dissolve features (lines) on attribute column that contains zones number. Other ...
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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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How to select lines/edges that overlap with a line layer in QGIS
I am calculating the shortest path in QGIS using the openrouteservice API. From the returned route, I would like to calculate the length of segments that are paved and those that are not paved.
Since ...
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Overlay shapefile boundaries on geom_tile heat map in R
I have a square matrix which corresponds to a square area of a map.
The values represent the mean value of any centroids in the relevant grid square.
I am visualising this using geom_tile in ggplot.
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