Reputation: 93
I have been following this workflow to convert coordinates from Eastings / Northings to Latitude / Longitude in R. Up until today it has been working fine. Here is a reproducible example:
require(rgdal)
# create test coordinates
x <- 259269 y <- 074728
# create test dataframe
dat <- data.frame(x, y)
class(dat) # "data.frame"
### shortcuts
ukgrid <- "+init=epsg:27700"
latlong <- "+init=epsg:4326"
### Create coordinates object
coords <- cbind(Easting = as.numeric(as.character(x)),
Northing = as.numeric(as.character(y)))
class(coords) # matrix
dat_SP <- SpatialPointsDataFrame(coords,
data = dat,
proj4string = CRS("+init=epsg:27700"))
# Error in !res[[1]] : invalid argument type
# Following steps ----
# Convert
dat_SP_LL <- spTransform(dat_SP, CRS(latlong)
# replace Lat, Long
dat_SP_LL@data$Long <- coordinates(dat_SP_LL)[, 1]
dat_SP_LL@data$Lat <- coordinates(dat_SP_LL)[, 2]
I think this may be related to the proj4string argument, but have been unable to resolve it. Any help is appreciated.
My session info:
> sessionInfo()
R version 3.6.1 (2019-07-05)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18362)
Matrix products: default
locale:
[1] LC_COLLATE=English_United Kingdom.1252 LC_CTYPE=English_United Kingdom.1252
[3] LC_MONETARY=English_United Kingdom.1252 LC_NUMERIC=C
[5] LC_TIME=English_United Kingdom.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] forcats_0.5.0 stringr_1.4.0 dplyr_0.8.3 purrr_0.3.3
[5] readr_1.3.1 tibble_3.0.1 tidyverse_1.3.0 ggspatial_1.1.2
[9] tmap_3.0 rnrfa_2.0.3 gdalUtils_2.0.3.2 zoon_0.6.5
[13] biomod2_3.4.6 sdm_1.0-89 SDMTools_1.1-221.1 SSDM_0.2.8
[17] odbc_1.2.2 DBI_1.1.0 rgeos_0.5-3 rgdal_1.5-8
[21] tidyr_1.1.0 ggplot2_3.3.1 knitr_1.25 raster_3.0-7
[25] sp_1.3-1
Upvotes: 8
Views: 3553
Reputation: 98
I encountered the same problem. The bug is related to sp::CRS. I solved it with a re-intallation of the 'sp' package.
Upvotes: 8
Reputation: 67
I am having the same problem. It comes from the CRS
function. If you look at the function it comes from line 34 (I marked with asterisks in code below), but I don't know how to fix it. It might be a bug. I mainly wrote this "answer" to draw more attention and I don't have the ability to comment.
Edit: You can set the doCheckCRSArgs = F
in the CRS
function, but still get a error when I try to spTransform
.
source crs creation failed: generic error of unknown origin
function (projargs = NA_character_, doCheckCRSArgs = TRUE)
{
if (!is.na(projargs) && !nzchar(projargs))
projargs <- NA_character_
stopifnot(is.logical(doCheckCRSArgs))
stopifnot(length(doCheckCRSArgs) == 1L)
stopifnot(is.character(projargs))
if (!is.na(projargs)) {
if (length(grep("^[ ]*\\+", projargs)) == 0)
stop(paste("PROJ4 argument-value pairs must begin with +:",
projargs))
}
if (!is.na(projargs)) {
if (length(grep("latlon", projargs)) != 0)
stop("northings must follow eastings: ", projargs)
if (length(grep("lonlat", projargs)) != 0) {
projargs <- sub("lon", "long", projargs)
warning("'lonlat' changed to 'longlat': ", projargs)
}
}
if (is.na(projargs))
uprojargs <- projargs
else uprojargs <- paste(unique(unlist(strsplit(projargs,
" "))), collapse = " ")
if (length(grep("= ", uprojargs)) != 0)
stop(paste("No spaces permitted in PROJ4 argument-value pairs:",
uprojargs))
if (length(grep(" [:alnum:]", uprojargs)) != 0)
stop(paste("PROJ4 argument-value pairs must begin with +:",
uprojargs))
if (doCheckCRSArgs) {
if (!is.na(uprojargs) && requireNamespace("rgdal", quietly = TRUE)) {
res <- rgdal::checkCRSArgs(uprojargs)
********if (!res[[1]])*********
stop(res[[2]])
uprojargs <- res[[2]]
}
}
res <- new("CRS", projargs = uprojargs)
res
}
Upvotes: 0