[R-sig-Geo] Encoding of attributes in SpatVector (terra package)

Mon Jun 21 03:36:40 CEST 2021

Hi Ben,

Sorry, now as plain text...

Thanks for your response. I guess, that is a Windows encoding problem 
then, as I get (below I also included how they differ):

###
identical(mtl.sf$NOM, mtl.spv$NOM)
[1] FALSE
 > sessionInfo()
R version 4.1.0 (2021-05-18)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 17763)

Matrix products: default

locale:
[1] LC_COLLATE=English_Canada.1252  LC_CTYPE=English_Canada.1252 
LC_MONETARY=English_Canada.1252
[4] LC_NUMERIC=C                    LC_TIME=English_Canada.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
  [1] sf_1.0-0        terra_1.3-4     forcats_0.5.1   stringr_1.4.0 
dplyr_1.0.7     purrr_0.3.4     readr_1.4.0
  [8] tidyr_1.1.3     tibble_3.1.2    ggplot2_3.3.4   tidyverse_1.3.1

loaded via a namespace (and not attached):
  [1] tidyselect_1.1.1   haven_2.4.1        lattice_0.20-44 
colorspace_2.0-1   vctrs_0.3.8        generics_0.1.0
  [7] utf8_1.2.1         rlang_0.4.11       e1071_1.7-7 
pillar_1.6.1       glue_1.4.2         withr_2.4.2
[13] DBI_1.1.1          sp_1.4-5           dbplyr_2.1.1 
modelr_0.1.8       readxl_1.3.1       lifecycle_1.0.0
[19] munsell_0.5.0      gtable_0.3.0       cellranger_1.1.0 
rvest_1.0.0        raster_3.4-13      codetools_0.2-18
[25] labeling_0.4.2     class_7.3-19       fansi_0.5.0 
broom_0.7.7        Rcpp_1.0.6         KernSmooth_2.23-20
[31] scales_1.1.1       backports_1.2.1    classInt_0.4-3 
jsonlite_1.7.2     farver_2.1.0       fs_1.5.0
[37] digest_0.6.27      hms_1.1.0          stringi_1.6.2      grid_4.1.0 
         cli_2.5.0          tools_4.1.0
[43] magrittr_2.0.1     proxy_0.4-26       crayon_1.4.1 
pkgconfig_2.0.3    ellipsis_0.3.2     xml2_1.3.2
[49] reprex_2.0.0       lubridate_1.7.10   assertthat_0.2.1   httr_1.4.2 
         rstudioapi_0.13    R6_2.5.0
[55] units_0.7-2        compiler_4.1.0
###

Here is the difference:
###
 > tail(mtl.sf$NOM)
[1] "Montréal-Est"            "Anjou" 
"Pierrefonds-Roxboro"     "Sainte-Anne-de-Bellevue"
[5] "Verdun"                  "Baie-d'Urfé"
 > tail(mtl.spv$NOM)
[1] "MontrÃ©al-Est"           "Anjou" 
"Pierrefonds-Roxboro"     "Sainte-Anne-de-Bellevue"
[5] "Verdun"                  "Baie-d'UrfÃ©"
###

So, basically, vect() seems to have problems to interpret non-ASCII 
characters in Windows.

Is there an easy way to fix that, e.g. by setting a parameter or is this 
a bug for the Windows edition?

Thanks,
Tim

On 2021-06-15 18:32, Ben Tupper wrote:
Hi,

Alas, HTML mail gets mangled - try setting your email client to send 
plan text.

I don't know what the NOM variable contents are supposed to look like,
but I find they are identical.  Can you post to the list your evidence
that shows how they differ and what makes one right versus the other
wrong?  Also, always add the output of sessionInfo() as shown below.

library(sf)
library(terra)

url <- 
"https://data.montreal.ca/dataset/00bd85eb-23aa-4669-8f1b-ba9a000e3dd8/resource/e9b0f927-8f75-458c-8fda-b5da65cc8b73/download/limadmin.geojson"

mtl.sf <- read_sf(url)# convert sf object to SpatVector object

mtl.spv <- vect(mtl.sf)

identical(mtl.sf$NOM, mtl.spv$NOM)
# [1] TRUE

sessionInfo()
# R version 4.0.3 (2020-10-10)
# Platform: x86_64-apple-darwin17.0 (64-bit)
# Running under: macOS Big Sur 10.16
#
# Matrix products: default
# LAPACK: 
/Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRlapack.dylib
#
# locale:
#   [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
#
# attached base packages:
#   [1] stats     graphics  grDevices utils     datasets  methods   base
#
# other attached packages:
#   [1] terra_1.2-10 sf_0.9-8     dplyr_1.0.5
#
# loaded via a namespace (and not attached):
#   [1] Rcpp_1.0.6         rstudioapi_0.13    raster_3.4-5
magrittr_2.0.1     units_0.7-1        tidyselect_1.1.1
# [7] lattice_0.20-41    R6_2.5.0           rlang_0.4.11
fansi_0.4.2        blob_1.2.1         tools_4.0.3
# [13] grid_4.0.3         KernSmooth_2.23-17 utf8_1.2.1
cli_2.5.0          e1071_1.7-6        DBI_1.1.1
# [19] ellipsis_0.3.2     class_7.3-17       assertthat_0.2.1
tibble_3.1.1       lifecycle_1.0.0    crayon_1.4.1
# [25] purrr_0.3.4        codetools_0.2-16   vctrs_0.3.8
glue_1.4.2         sp_1.4-5           proxy_0.4-25
# [31] compiler_4.0.3     pillar_1.6.0       generics_0.1.0
classInt_0.4-3     pkgconfig_2.0.3

Cheers,
Ben

On Tue, Jun 15, 2021 at 11:57 AM Tim Elrick <abo using elrick.de> wrote:
 >
 > Hi all,
 >
 > Does anyone know how to change encoding for attributes in a SpatVector
 > (terra package)?
 >
 > library(sf) library(terra)
 > # importing a geojson file as sf object url <-
 > 
"https://data.montreal.ca/dataset/00bd85eb-23aa-4669-8f1b-ba9a000e3dd8/resource/e9b0f927-8f75-458c-8fda-b5da65cc8b73/download/limadmin.geojson"
 > mtl.sf <- read_sf(url)# convert sf object to SpatVector object mtl.spv
 > <- vect(mtl) # while mtl.sf$NOM # displays French letters correctly,
 > mtl.spv$NOM # does not anymore Thanks, Tim
 >
 >
 >          [[alternative HTML version deleted]]
 >
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