Find approximated latitude, longitude and elevation of an airport according to
IATA, International Air Transport Association, or
ICAO, International Civil Aviation Organization, airport code. Two source of
information about airports are used. First the function search in the list of
airports available at
https://ourairports.com/data/
created by David Megginson.
If an airport cannot be found there, the second list of airports is searched, from
https://weather.ral.ucar.edu/surface/stations.txt
prepared by Greg Thompson from
National Weather Service NCAR/RAP.