All Questions
Tagged with vectorization r
11
questions
8
votes
1
answer
614
views
Creating a seamless vector dataset from raster with gdal, R or Python
I'm trying to create a seamless vector dataset from an integer raster. "Seamless" as in: not gaps between features and no overlapping features.
The tools gdal_polygonize, pkpolygonize, terra:...
- 1,003
0
votes
0
answers
160
views
Converting Raster into Vector in QGIS
I am in process of converting one raster file ( JBA Flood score) into Vector file But due to raster size ( Possibly) process seems endless i.e. even after 9 hours process still continue. Is there any ...
- 103
1
vote
0
answers
52
views
Conceptual question on comparing rasterized data with vectorized (polygons) data
I've got this doubt on how to best proceed with the following situation: I would like to compare two datasets, one (model_data) is a raster (NetCDF format), with lat, lon and time as coordinates, ...
- 123
2
votes
2
answers
8k
views
Extract cells above certain values of raster file
I have a very large raster layer and with the values for noise emission. I'd like to extract all cells which are above a certain threshold value (e.g. 50 db) and convert them to an ESRI Shapefile so ...
- 326
0
votes
1
answer
222
views
Error in overlay - formula not vectorized
I've run into another error while trying to get my predictive model to work. My base model is basically done (extracting locational parameters from archaeological sites in an area, and calculating a ...
- 43
3
votes
1
answer
1k
views
Finding external boundary of bunch of vectors (using R libraries)
I have vectorized raster as in the image. This is actually 1419 polygons in SpatialPolygons class object.
I'm looking for a method which would allow me to extract the one most external polygon (...
- 477
3
votes
1
answer
3k
views
Converting large raster to vector?
I have a shapefile which contains 10.000 polygons and I want to know how many of them falls on a specific land use. Unfortunately, the land use map that I have to use is a raster map and not a vector ...
- 81
0
votes
1
answer
1k
views
Create polygons based on raster values
I have 4 raster layers contained in a raster stack within program R. The layers represent occurrence surfaces for two species in two seasons (i.e. species one summer and winter and species 2 in summer ...
- 137
1
vote
1
answer
2k
views
Error coercing raster to SpatialPixelsDataFrame in R
I obtain the below error when I try to coerce my raster to a vector.
Initially my rasters are of different extents and I use the projectRaster tool to obtain the same extent for both the rasters. ...
- 1,342
2
votes
0
answers
344
views
R raster rasterToPolygon Error
I'm trying to convert a RasterBrick to polygon, across four different resolutions. It works for the coarsest three resolutions, but for the finest resolution, I get an error that I can't find much ...
- 585
3
votes
0
answers
435
views
Kernel Density with vector output and/or possible automation?
I'm currently working on a project that will have me calculate the kernel density of a number of shapefiles with varying parameters. My current workflow goes like this:
Import shapefiles in QGIS 2.10....
- 41