Created
February 1, 2023 18:05
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Utilisation de l'API IGN pour récupérer une route depuis un point A à un point B
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| start <- "2.337306%2C48.849319" | |
| end <- "2.367776%2C48.852891" | |
| library(jsonlite) | |
| get_route <- function(start, end) { | |
| url <- glue("https://wxs.ign.fr/calcul/geoportail/itineraire/rest/1.0.0/route?resource=bdtopo-osrm&start={start}&end={end}&profile=car&optimization=fastest&constraints=%7B%22constraintType%22%3A%22banned%22%2C%22key%22%3A%22wayType%22%2C%22operator%22%3A%22%3D%22%2C%22value%22%3A%22autoroute%22%7D&getSteps=true&getBbox=true&distanceUnit=kilometer&timeUnit=hour&crs=EPSG%3A4326") | |
| j <- read_json(url) | |
| coords <- j$geometry$coordinates | |
| out <- lapply(coords, function(elt) { | |
| long <- elt[[1]] | |
| lat <- elt[[2]] | |
| cbind(long, lat) | |
| }) | |
| res <- do.call(rbind, out) | |
| g <- st_linestring(res) | |
| return(g) | |
| } | |
| get_route(start, end) |
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