#Leaflet

Recently I wanted to be able to add a custom basemap of NHDPlus features to mapview leaflet maps. It’s not straitforward out of the box in mapview, but I found the helpful tips to do it here and here. Below I add the WMS service from EPA Waters along with USGS StreamGage stations in Benton County, OR using the dataRetrieval package. library(dataRetrieval) library(mapview) library(sf) library(leaflet) Stations <- readNWISdata(stateCd="Oregon", countyCd="Benton") # DataRetrival returns objects as 'attributes' - things like the url used, site metadata, site info, etc - just use attributes(Durham_Stations) to examine siteInfo <- attr(Stations , "siteInfo") stations_sf = st_as_sf(siteInfo, coords = c("dec_lon_va", "dec_lat_va"), crs = 4269,agr = "constant") m <- mapview(stations_sf) m@map = m@map %>% addWMSTiles(group = 'NHDPlus', "https://watersgeo. [Read More]

Just finished putting together and running a half-day R Spatial Workshop covering some cool new R spatial things using packages such as sf, DataRetrieval, mapview, and combining dplyr chained operations with sf among other things. And I finally, after a year, got Disqus to start working on my blog! All I did was update blogdown and rebuild - if only everything were so simple…