BillGravell
MIS
Does anyone know of a method of calculating staight-line distance between 2 points using latitude and longitude?
Thanks,
Bill
Thanks,
Bill
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How to Calculate Distance using Lat and Lon?
- Thread starter BillGravell
- Start date
- Status
By entering "Distance Lat Long Algorithm" onto the Google Search page I found the following posting:
On that page they give the following:
==========================================
The algorithm below will calculate great circle distances between pairs of lat/long coordinates. I pulled it out of one of my SAS programs, but the syntax is pretty basic. It uses lat/longs in radians, and the distance is in kilometers. Take out the 57.29578 factor to use lat/longs in degrees,
and take out the 1.852 factor to get distance in nautical miles.
DISTANCE =3D 1.852 * 60 * 57.29578 * ARCOS((SIN(LAT1) *
SIN(LAT2)) + (COS(LAT1) * COS(LAT2)) *
COS(LON2 - LON1))
==========================================
There are other references there also.
I cannot attest to the accuracy of the algorithm, but you might want to check it out and/or use Google to look for more. There seemed to be quite a few discovered web pages.
Good Luck,
JRB-Bldr
VisionQuest Consulting
Business Analyst & CIO Consulting Services
CIOServices@yahoo.com
On that page they give the following:
==========================================
The algorithm below will calculate great circle distances between pairs of lat/long coordinates. I pulled it out of one of my SAS programs, but the syntax is pretty basic. It uses lat/longs in radians, and the distance is in kilometers. Take out the 57.29578 factor to use lat/longs in degrees,
and take out the 1.852 factor to get distance in nautical miles.
DISTANCE =3D 1.852 * 60 * 57.29578 * ARCOS((SIN(LAT1) *
SIN(LAT2)) + (COS(LAT1) * COS(LAT2)) *
COS(LON2 - LON1))
==========================================
There are other references there also.
I cannot attest to the accuracy of the algorithm, but you might want to check it out and/or use Google to look for more. There seemed to be quite a few discovered web pages.
Good Luck,
JRB-Bldr
VisionQuest Consulting
Business Analyst & CIO Consulting Services
CIOServices@yahoo.com
- Status
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