find_stations: Find nearest stations using a point's coordinates

In hydroscoper: Interface to the Greek National Data Bank for Hydrometeorological Information

Description

find_stations returns a tibble with the nearest stations' distances using a given point's longitude and latitude values. This function uses the Haversine formula for distance calculation in km.

Usage

find_stations(longitude = 24, latitude = 38)

Arguments

longitude	a numeric value in degrees
latitude	a numeric value in degrees

Value

If the given longitude is in [24, 38] and the latitude is in [34, 42] (i.e. are valid values for Greece) returns an ordered tibble with the station_id, name, subdomain and distance values in km. The station's data that are used come from the 'stations' dataset. Otherwise returns an error message.

Examples

# find the five nearest stations to a point near Thessaloniki,
# (lon, lat) = (22.97, 40.60)
head(find_stations(22.97, 40.60), 5)

hydroscoper documentation built on May 14, 2021, 5:08 p.m.