The goal of demsrc is to return the remote url sources for global DEM
products. For now, the only main function is mpc_dtm_src which
accesses the collections via the Microsoft Planetary Computer STAC
catalog using the
{rstac} package
You can install the development version of demsrc from GitHub with:
# install.packages("devtools")
devtools::install_github("Permian-Global-Research/demsrc")Here we load a few packages…
library(demsrc)
library(terra)
library(sf)And now we request the ALOS DEM urls for the Mount Hood area in Oregon using the bounding box coordinates.
(mh <- mpc_dtm_src(c(-121.772, 45.321, -121.611, 45.419),
collection = "alos-dem"
))
#> [1] "/vsicurl/https://ai4edataeuwest.blob.core.windows.net/alos-dem/AW3D30_global/ALPSMLC30_N045W122_DSM.tif?st=2024-10-10T18%3A50%3A43Z&se=2024-10-11T19%3A35%3A43Z&sp=rl&sv=2024-05-04&sr=c&skoid=9c8ff44a-6a2c-4dfb-b298-1c9212f64d9a&sktid=72f988bf-86f1-41af-91ab-2d7cd011db47&skt=2024-10-11T17%3A45%3A13Z&ske=2024-10-18T17%3A45%3A13Z&sks=b&skv=2024-05-04&sig=%2FVaHX%2FOUFqnv49HRsoxq2PSnDRWeMwxDxbMtN0Cfvc8%3D"
plot(rast(mh))
And now to get the COP30 DEM urls for the North Carolina dataset, using and sf object as the area of interest.
nc_sf <- system.file("gpkg", "nc.gpkg", package = "sf") |>
read_sf()
# show the first 3 urls:
mpc_dtm_src(nc_sf, collection = "cop-dem-glo-30")[1:3]
#> [1] "/vsicurl/https://elevationeuwest.blob.core.windows.net/copernicus-dem/COP30_hh/Copernicus_DSM_COG_10_N36_00_W085_00_DEM.tif?st=2024-10-10T18%3A50%3A47Z&se=2024-10-11T19%3A35%3A47Z&sp=rl&sv=2024-05-04&sr=c&skoid=9c8ff44a-6a2c-4dfb-b298-1c9212f64d9a&sktid=72f988bf-86f1-41af-91ab-2d7cd011db47&skt=2024-10-11T09%3A34%3A22Z&ske=2024-10-18T09%3A34%3A22Z&sks=b&skv=2024-05-04&sig=2h%2BVqHwAxxs%2FJF6UbDkoBRnYjJzUTqEMxKbCodR%2BWGs%3D"
#> [2] "/vsicurl/https://elevationeuwest.blob.core.windows.net/copernicus-dem/COP30_hh/Copernicus_DSM_COG_10_N36_00_W084_00_DEM.tif?st=2024-10-10T18%3A50%3A47Z&se=2024-10-11T19%3A35%3A47Z&sp=rl&sv=2024-05-04&sr=c&skoid=9c8ff44a-6a2c-4dfb-b298-1c9212f64d9a&sktid=72f988bf-86f1-41af-91ab-2d7cd011db47&skt=2024-10-11T09%3A34%3A22Z&ske=2024-10-18T09%3A34%3A22Z&sks=b&skv=2024-05-04&sig=2h%2BVqHwAxxs%2FJF6UbDkoBRnYjJzUTqEMxKbCodR%2BWGs%3D"
#> [3] "/vsicurl/https://elevationeuwest.blob.core.windows.net/copernicus-dem/COP30_hh/Copernicus_DSM_COG_10_N36_00_W083_00_DEM.tif?st=2024-10-10T18%3A50%3A47Z&se=2024-10-11T19%3A35%3A47Z&sp=rl&sv=2024-05-04&sr=c&skoid=9c8ff44a-6a2c-4dfb-b298-1c9212f64d9a&sktid=72f988bf-86f1-41af-91ab-2d7cd011db47&skt=2024-10-11T09%3A34%3A22Z&ske=2024-10-18T09%3A34%3A22Z&sks=b&skv=2024-05-04&sig=2h%2BVqHwAxxs%2FJF6UbDkoBRnYjJzUTqEMxKbCodR%2BWGs%3D"