Nav get radius

Description

nav_items = nav_get_radius(nav_type, lat, lon, distance) (up to AM/AP 3.7)
nav_get_radius(nav_type, lat, lon, distance, max_entries, callback) (from AM/AP 4.0)
nav_get_radius(nav_type, lat, lon, distance, max_entries, timeout, callback) (from AM/AP 4.0)

nav_get_radius can be used to get the NAV points, within a radius around a given latitude and longitude.

Return value

This function won't return a value.

Arguments

#	Argument	Type	Description
1	nav_type	String	The NAV type to query, click here to see the NAV types page for all available types.
2	latitude	Number	The latitude to search from
3	longitude	Number	The longitude to search from
4	distance	Number	The radius in which to search for the NAV points. (in nautical miles, nm)
5	max_entries	Integer	Limit the number of returned NAV points.
6	timeout	Number	(Optional) Wait timeout in seconds. If data is not available within the timeout, the callback will be called without data. Default 1 second.
7	callback	Function	Callback function when data is fetched. This function is also called on error or timeout.

Example

local function data_callback(airports)
  if airports ~= nil then
    -- Print the found airports to log
    for i=1, #airports do
      print("ID=" .. airports[i]["ID"] .. " name:" .. airports[i]["NAME"] .. " lon:" .. airports[i]["LONGITUDE"] .. " lat:" .. airports[i]["LATITUDE"])
    end
  else
    print("Error while querying nav data")
  end
end

-- Find the Airports within 20 nautical miles from a certain latitude and longitude
nav_get_radius("AIRPORT", 52.222484, 5.483563, 20, 200, data_callback)