MazamaLocationUtils (version 0.4.3)

table_getLocationID: Return IDs of known locations

Description

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.

Usage

table_getLocationID(
  locationTbl = NULL,
  longitude = NULL,
  latitude = NULL,
  distanceThreshold = NULL,
  measure = c("geodesic", "haversine", "vincenty", "cheap")
)

Value

Vector of known locationIDs.

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

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)

# Expanding the distanceThreshold will find one
table_getLocationID(locationTbl, lon, lat, distanceThreshold = 5000)