text: what is the altitude for zip code 75254? i have a watch with an altimeter and i need to calibrate it the intersection of alpha rd. and hilcrest rd. is benchmarked as 534 ft in a topo map:   the topo map: http://www.topozone.com/map.asp?lat=32.9263&lon=-96.7888&size=l&symshow=n&datum=nad83  google map (easier on the eye)  http://maps.google.com/maps?oi=map&q=75254  ---- b.t.w. the area in and around dallas is between 300 - 800 ft. above sea level (as per a dallas website)