All Questions
Tagged with vectorization vector
11
questions
0
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31
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Extract a vector from a raster with a single boundary in QGIS
I have a "problem", I need transform a raster in a vector and it works but some pixels like the one in the print it is separated from the boundary, and for my use (a specific use of ...
- 91
1
vote
1
answer
63
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Generate points from raster image in QGIS
I'm hoping to generate a new vector file from select points from a raster image in QGIS. I don't know if it is possible.
For instance, I would like to generate a vector point file that puts a point ...
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0
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143
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How to convert raster to vector by generating center lines?
I need to vectorize the raster by keeping one center line trough the boundary pixels. My solution would need to be very similar to this question: Converting raster to vector by generating center lines?...
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240
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Creating shapefile of a raster image in QGIS 3.6
I use QGIS 3.6 on Windows and I have been trying to convert raster images into shapefiles. I managed to do that for Digital Terrain Models only, using the conversion --> vectorize tool in the qgis ...
- 109
8
votes
2
answers
2k
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Estimating resolution of vector data?
I got an old vector dataset with polygons covering a continent. The data was first published on paper at scale 1:5 000 000 and was later digitalized. I don't have the original data and no information ...
- 398
1
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0
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962
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QGIS: Raster to vector too large
I am working with a DTM of 5x5m for a large area (already clipped it). I calculated the slopes and want to maintain only the slopes above 2 degrees. I already used the raster calculator to set all ...
- 825
1
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0
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450
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Calculating vector area in QGIS? [closed]
I have calculated a viewshed (ZVI) in OpenWind and opened the raster in QGIS
I have then converted the raster to a vector
When I open the attribute table there are 4682 rows (features) and there is ...
- 241
7
votes
1
answer
3k
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Free implementation of Polynomial Approximation with Exponential Kernel (PAEK) algorithm
I need a Free (i.e. Open Source) implementation of the Polynomial Approximation with Exponential Kernel (PAEK) algorithm, preferably in C, C++, Python, Julia or R.
The algorithm is one of the ...
- 236
2
votes
1
answer
223
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Preserving polygon boundaries when vectorizing raster according to polygon vector? [closed]
I have a raster which I clip by some polygons and then convert to polygon. I would like to obtain the same number of polygons in both my vector files.
The problem is that some areas in the vector ...
- 3,785
1
vote
1
answer
3k
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Automatically vectorizing data from WMS using ArcGIS Desktop (ArcScan)?
I am facing a problem, when I have a historic map in WMS layer and I need to get buildings from this map (approx. 2000) to vector layer fo further analysis.
Is there any workflow how to ...
- 305
6
votes
2
answers
6k
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Converting points to lines with Python GDAL
I have a dictionary with points. The points are derived from a raster (see image below). The points are not sorted and are not in order. The dictionary looks for example like this:
pointDict = {0: (...
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