5
votes
Accepted
clip_roi dimension error
Your polygon has 3 coordinates including a Z. Drop z
sf_object = sf::st_zm(sf_object)
By the way your polygon is covering dozens of tiles. It means you are going to load in memory dozen of square ...
- 8,343
4
votes
Accepted
Memory efficient way of using clip_roi for bigger areas
When using clip_roi() the default consists in loading the data in R as you noticed. However this function is also optimized to do not load anything at all in R if you put the output into a file. Each ...
- 8,343
2
votes
Counting number of observations per pixel in a rasterstack
Example data
library(terra)
s <- rast(ncol=10, nrow=10, nlyr=5)
set.seed(0)
values(s) <- sample(c(1:4, NA), size(s), replace=TRUE)
You can count the NAs like this
sna <- sum(is.na(s))
And ...
- 9,776
2
votes
Counting number of observations per pixel in a rasterstack
library(terra)
# Create rasters for example
# Basic raster
r1 <- rast(ncol=2,nrow=2)
# Assign values to raster cells. Notice I put an NA in one.
r1[] <- c(NA,2,3,4)
# Second ...
- 352
2
votes
Why doesn't terra::spin() work in R?
The help for spin says:
Spin (rotate) the geometry of a SpatVector.
and what you have is a raster, not vector, which we can see when you read the error message:
Error in (function (classes, fdef, ...
- 57.9k
1
vote
lidR, create table with numberofreturn by returnnumber in catalog
It is unclear what you are asking. This question seems to be about R not about lidR. If you want to force your table to be 7x7 you can do it this way but I'm not sure I answered the question.
rn = ...
- 8,343
1
vote
Accepted
Successfully mosaicking rasters in R, but the analysis is not showing values
Since you have only 3 out of 4 tiles in your mosaic, 1/4 of the mosaic are NA values. By default, range doesn't exclude NA's, so add na.rm = TRUE
range(values(C_raster), na.rm = TRUE)
You can also ...
- 12.8k
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