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Questions tagged [rasterize]

107 questions
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How to build a loop to rasterize several simple features?

How to build a loop to rasterize several simple features step by step? library(sf) library(fasterize) b0 = st_polygon(list(rbind(c(-1,-1), c(1,-1), c(1,1), c(-1,1), c(-1,-1)))) b1 = b0 + 2 b2 = b0 + c(-0.2, 2) x = st_sfc(b0, b1, b2) x =…
ilex
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Rasterizing coordinates for an irregular polygon changes original shape

I am trying to smoothen the edges of an irregular polygon in R, namely to turn its sharp corners into round edges. I am trying to do this using smoothr::smooth, but this function operates on objects from packages sf or sp while all I have is a set…
Marco Plebani
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R: mask() and rasterize() with spatialPolygonsDataFrame having holes

I have a spatialPolygonsDataFrame consisting of 3 polygons. The third polygon has the same shape as the first but has a hole where the second polygon is located. I built the hole in the using the answer from another question (How to add a hole to a…
yPennylane
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Gdal Rasterize inserts unwanted line of null values in raster misalligning subsequent rows

I'm using GDAL.rasterize to rasterize a simple shapefile of points. The shapefile points simply consists of Xco-ord, Yco-ord and an integer data value. Everything about the output file is fine except for a single row containing only No_data…
DPTPM
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Rasterize WKT polygon (from geopandas) with Python and OGR/GDAL

As a coding enthusiast I am currently creating my own "geospatial" tool as how I would like it to work. However right on the start I am already facing a problem. My tool should work using GeoPandas to extract information and then OGR/GDAL for the…
Mr unkown
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Rasterize multiple fields of a shapefile at once

I have to rasterize each 62 columns of 30 big shapefiles (>8million cells) resulting in 1860 rasters. I'm able to do this in R with smaller shapes (~ 8000 features) quite easily and fast. However, when just trying to load this big shape in R, it…
João Pompeu
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How to judge whether a local pc machine supports d2d hardware acceleration

Hardware acceleration is a feature supported by Direct2D. Here is my question. As far as I know, Hardware acceleration is limited by GPU model, driver version .etc. Does anybody know the details of this? In other words, how to determine whether a…
Frank
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How can I disable ghostscipt rasterization of images and paths?

I need to convert a PDF to a different ICC color profile. Through different searches and tests, I found out a way to do that: First I convert my PDF to a PS file with: .\gswin64c.exe -dNOPAUSE -dBATCH -sDEVICE=ps2write -sOutputFile="test.ps"…
FFRock
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Extract strings from shapefile attribute using GDAL and Python 3.X

I have a shapefile that consists of two fields/attributes, one being integers, the other being strings. I can extract the integers into Python array by first using the function gdal.RasterizeLayer() to burn the shapefile into a .tiff image as the…
adam
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Rasterizing in R does not seem to handle 'islands' well

I'm trying to rasterize shape files and I notice a very annoying artifact. If the shapfile contains a shape of a road that fully encloses a region than that whole region is identified with the class road in the raster. In the images below there is…
Daan
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Could not load file or assembly Ghostscript.NET

I am using Ghostscript.Net, Version=1.2.1.0, to rasterize PDF to images. I have referenced both the 32 bit-gsdll32.dll and 64 bit-gsdll64.dll of ghostscript in my project directory/bin folder. I am using this piece of code to get the path of the…
Mellionis
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How to automatically convert many fields of a polygon shapefile to raster in R

I have a shapefile representing Thiessen polygons. Each polygon is associated with many values of a table. thiessen <- readOGR(dsn = getwd(), layer = poly) OGR data source with driver: ESRI Shapefile Source: ".../raingauges/shp", layer:…
João dos Reis
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CABasic Animation on iPhone X causes "Warping" of Rasterised Layers

I am creating an App that uses CABasic Animation on Sublayers of a UIView. Scaling and Position Animations are involved and the Layers are CAShapeLayers with shouldRasterize set to true for smooth Animation. This works, but on the iPhone X, Layers…
Razattax
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Export/Rasterize alpha shape to bitmap

I build an alpha shape from some points (example given in code) and want to export the shape to a raster graphics format. I need the shape only, not the plot markings (axis, scales ect). I need only the resulting triangle on white ground as a…
Topi Anachname
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gdal.RasterizeLayer: using the where parameter

In python, I'm using the following line of code: gdal.RasterizeLayer(outDs, [1], Shp, burn_values=[ii]) My shapefile 'Shp' has a field named 'landuse', which stores strings (class name). I need to burn a number for different class name. I was…
Bruno von Paris
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