All Questions
Tagged with vectorization rasterio
6
questions
1
vote
1
answer
119
views
Fastest way to clip millions of small polygons and storing results as JSON [closed]
I have a dataset with couple million farm polygons (around 2.5 million and only expected to grow in the future), and I need to calculate the NDVI for these farm polygons, with some basic stats (...
- 3,346
4
votes
1
answer
634
views
Vectorizing all pixels as separate polygons using rasterio
I use rasterio.features.shapes and use the geometry of pixels in raster data to create polygons for each pixel. Pixels with the same value merge these pixels if they are adjacent.
What I want is for ...
- 73
2
votes
1
answer
2k
views
Extracting raster outline to a vector geometry
I have a raster data set with an irregular outline (every value outside is NaN) in Python (loaded from rasterio v.1.3a3 ):
I'd like to extract its outline to a vector shape, such as a Shapely ...
- 10.5k
1
vote
0
answers
430
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Draw polygon (vectorize) raster based on same colored pixels -- getting bad polygons
So, I have a TIF georeferenced map and a rather messy shape that I need to digitize. It is green but has a lot of holes in it that are light green color. So, I want to capture all green pixels and ...
1
vote
1
answer
238
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Wrong features when exporting vectorized raster data to a file using GeoPandas after applying a filter and a dissolve operation
I have a raster file with black areas having a value of 0 and white areas having a value of 1, resulting from a visibility analysis:
I vectorized this raster after loading it with rasterio:
import ...
- 10.5k
0
votes
1
answer
4k
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How to polygonise a binary raster with python?
I already asked this in StackOverflow, but maybe it's better here. I have a ndvi raster that I binarized (I put my threshold at 0.35) with a script python and I wanted to polygonize this raster, in ...
- 39