library(happign)
#> Please make sure you have an internet connection.
#> Use happign::get_last_news() to display latest geoservice news.
library(sf)
#> Linking to GEOS 3.11.2, GDAL 3.6.2, PROJ 9.2.0; sf_use_s2() is TRUEEven if almost all IGN data are available to the general public, some layers are distributed within a stricter framework of use. The SCAN 25®, SCAN 100® and SCAN OACI (and associated online services) are distributed under license conditions that can be consulted [here](https://geoservices.ign.fr/cgu-licences#licence . The final use in a professional or associative context is free without exception, according to the terms of this license. The final use for the general public is free of charge up to a certain threshold, then paying, according to the appropriate general conditions. All infos can be found here.
The SCAN 25® is a unique reference, recognized for its topographic richness, and offers an exemplary representation of the territory (1/25 000)
The SCAN 100® is a perfect compromise between a rather rich topographic representation and a global visualization of the territory (1/100 000
The SCAN OACI corresponds to the aeronautical reference maps in the field of civil aviation
These layers are WMS raster, so you just have to use the
get_wms_raster() function with a personal apikey. To do
this, you need to create an account on the geoservice site and then request
a key in the “My keys” section of your account. It should look like this
: “abc12efghi34j5k678lmnopq” (obviously, this is a fake key).
Then you choose the layer you want at the Web services from IGN SCANs and it’s done !
# Create or import a shape
penmarch <- get_apicarto_cadastre("29158", "commune")
my_key <- "abc12efghi34j5k678lmnopq"
scan25_name <- "SCAN25TOUR_PYR-JPEG_WLD_WM"
scan25 <- get_wms_raster(penmarch,
apikey = my_key,
layer = scan25_name,
res = 1, # To have full resolution
filename = "SCAN25.tif") # This resource need to be downloaded on disk