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How to extract raster data from a Shape? */
printf("%d\n", 42); /* Como fazer para extrair dados de raster a partir de um shape
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Hello, probably what you want is a Mask
library(raster)
#raster exemplo
r<-raster(ncol=10,nrow=10)
r[]<-1:ncell(r)
plot(r)
#poligono exemplo
pol<-raster(ncol=2,nrow=2)
pol[]<-1:ncell(pol)
pol<-as(pol,"SpatialPolygons")[1]
plot(r);plot(pol,add=T)
#crop ou mask para cortar
c1<-crop(r,pol)
m1<-mask(r,pol)
#mask nao altera o extent, o crop sim
#retornar valores do raster cortado
v1<-values(c1) #valores sem NA
v2<-values(m1) #valores com NA
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Your question is not clear. Please set what type of Shape, raster etc. Put some example of the data you want to do the transformation.
– Daniel Ikenaga
I have a tif file and I have a polygono inside the raster.
– M.J.E
really, can’t understand your question at all, man, try sending a Toy version of your code to agnt give you a help
– Guilherme Marthe