Basically reading long/lat every 5 seconds - then calculating distance to database of known SpeedCams longs and lats.
Not sure about the projection - assumptions are made when calculating distance that it is as the crow flies and for the purpose of calculating small distance between where your car is and where the speedcam is - this seems to work (proving the coordinate system is the same)- for an explanation of calculating distance see this web site.
http://www.movable-type.co.uk/scripts/latlong.html
Quote: Originally Posted by
jwrpalmer 
good news - looking forward to it
can I ask if you are calculating x/y from the lat/long coordinates and if so what projection system youre using - just out of interest
