Par2: Distance between two zip codes (longitude/latitude method) 2009-04-10 -- David Bratovich point1_lat REAL
point1_long REAL
point2_lat REAL
point2_long REAL
RADIUS_ LONG
PI_ REAL
DEG_PER_RAD_ REAL
DISTANCE_ REAL
somewhere in your code...
point1_lat = 33.658179 !92718 IRVINE CA
point1_long = 117.711476
point2_lat = 38.875939 !20024 WASHINGTON DC
point2_long = 77.016028
do calc_distance
CALC_DISTANCE ROUTINE
RADIUS_ = 3958 !Earth's radius (miles)
PI_ = 3.1415926
DEG_PER_RAD_ = 57.29578 !Number of degrees/radian (for conversion)
DISTANCE_ = (RADIUS_*PI_*SQRT((POINT1_LAT - POINT2_LAT)*(POINT1_LAT -
POINT2_LAT)+COS(POINT1_LAT/DEG_PER_RAD_)*COS(POINT2_LAT/DEG_PER_RAD_)*(POINT1_LONG
- POINT2_LONG)*(POINT1_LONG - POINT2_LONG))/180)
MESSAGE('Distance = '& DISTANCE_ & ' Miles')
You can get a database of Zipcode Lat/Long on the net.
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