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CALCULATING DISTANCES
BETWEEN TWO CITIES
 Astronomy
Answers: Great Circles
Calculating
Distances Between Two Points (from the Australian Government)
Latitude/Longitude,
NCGIA (by Kirvan, Anthony P., 1997),
Core Curriculum in GIScience
GIS
FAQ Q5.1: Great circle distance between 2 points
Using
great circles to understand motion on a rotating sphere
Spherical
Trigonometry Related to Distance Computation
Aviation
Formulary (by Ed Williams)
Geographic
Co-ordinates
Mapping
the Sphere
Great
Circle explanation (from Matwworld)
Great
Circle Distance explanation (from answers.com)
Calculating
daylight hours by date and latitude (from mathforum)
Find
All Cities (Using latitude and Longitude), x miles off a straight line between
two cities (from mathforum)
How
did Eratosthenes measure the circumference of the earth? (from mathforum)
Rhumb
Lines and Great Circle Routes (from mathforum)
The Deluge
and Geodesy – An historical review to distance calculation
ONLINE
CALCULATOR
How Far Is It
(by indo.com)
Great
Circle Calculator (by U.S. Geological Survey)
Spreadsheets
to calculate Great Circle distances (by andrew-gray.com)
Latitude/Longitude
Distance Calculation page (by Chris Michels)
Search
for latitude and longitude data by entering a zip code or town
and state information (from the Bureau of the Census Gazetteer)
FREE
DISTANCE CALCULATION SCRIPTS
C++
Geographic
Distance and Azimuth Calculations (by Andy McGovern)
Java
Bearing
and Distance calculations (from Bowditch's Practical Navigator)
Php
Geographic
Distance and Azimuth Calculations
(by Steven Brendtro of www.imaginerc.com)
Perl
Great-circle
distance between two points on earth's surface
(by Darrell Kindred)
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