Returns a vector of locationIDs for the known locations that each incoming location will be assigned to within the given. If more than one known location exists within the given distanceThreshold, the closest will be assigned. NA will be returned for each incoming that cannot be assigned to a known location in locationTbl.

table_getLocationID(
  locationTbl = NULL,
  longitude = NULL,
  latitude = NULL,
  distanceThreshold = NULL,
  measure = "geodesic"
)

Arguments

locationTbl

Tibble of known locations.

longitude

Vector of longitudes in decimal degrees E.

latitude

Vector of latitudes in decimal degrees N.

distanceThreshold

Distance in meters.

measure

One of "haversine" "vincenty", "geodesic", or "cheap" specifying desired method of geodesic distance calculation. See ?geodist::geodist.

Value

Vector of known locationIDs.

Note

The measure "cheap" may be used to speed things up depending on the spatial scale being considered. Distances calculated with measure = "cheap" will vary by a few meters compared with those calculated using measure = "geodesic".

Examples

locationTbl <- get(data("wa_monitors_500")) # Wenatchee lon <- -120.325278 lat <- 47.423333 # Too small a distanceThreshold will not find a match table_getLocationID(locationTbl, lon, lat, distanceThreshold = 50)
#> [1] NA
# Expanding the distanceThreshold will find one table_getLocationID(locationTbl, lon, lat, distanceThreshold = 5000)
#> [1] "8e54314f43eb8746"