You need to use GeodeticCalculator class from geotools - it will calculate
distance on the ellipsoid (ie it will give you the distance in meters between
two lat long points - for formular you are using will give you the distance in
angle). This will still be the straight line distance...
For driving distance you would need to use a route finder; and have a highway
data set:
- http://docs.codehaus.org/display/GEOTDOC/Graphs
In the future please email questions directly to the geotools-gt2-users list -
while you can email implementers directly many can provide you with support
contract information if you have a reason to to be on public emails lists. For
more information:
- http://docs.codehaus.org/display/GEOTDOC/10+Communication+and+Support
Jody
From: sameer hassan [mailto:[email protected]]
Sent: Monday, 17 August 2009 7:58 PM
To: Jody Garnett; [email protected]
Subject: Real Driving Distance in java
Dear Nicolas Gramlich
I am Sameer Hassan a Student at Otto von Guericke University Magdeburg,Germany
i came through the Geo server website http://geoserver.org/display/GEOS/Welcome
which is a open source software server written in Java.
i need to calculate the real driving distance for the lat long stored in mysql
databse
right now i am doing this in java using the simple mathematical formula
//
protected double distance(double pX, double pY) {
double dx=this.x - pX;
double dy=this.y - pY;
double distance=Math.sqrt(dx * dx + dy * dy);
return distance;
}
//
and stores the result in a distance cache
can you tell me how can i implement the real driving distance to this one
any guidance or help would me much appreciated
--
Regards
Sameer
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