davegu

Hi All I am very new to this sort of thing and as an older person I am finding coding very difficult, but I am trying :-) I have just created my first website using Drupal 7, PHP 5 and MySQL 5.5 at www.donnyradar.co.uk. One of my tables is filled by the output from from a planes adsb transponder and gives me its ICAO code, callsign, altitude and location (lat/lon) What I would like to do is take a point on a map (an airbase) and be able to isolate any aircraft within a 10 mile radius with height less than 5000ft. My questions are: 1) Is this Possible? 2) If so, how would I do it? I have got as far as thinking that I need to create a table containing the Lat/Lon of any airbases that I require, but haven't got a clue where to go from there. Thanks in anticipation Dave