[OpenLayers-Users] Measuring tool

[Andrew de Klerk]

How accurate do you need it?. We use a basic function to determine distance
based upon the earth's radius. This IS NOT accurate, but, does work for our
purposes. This functions gets  the distance by passing in a vector feature

            function ShowMeasureDistance(feature) {
     				var dist = feature.geometry.getLength();
				dist = 6378137.0*(22/7)*dist / 180.0
                		alert("Distance: " + dist.toFixed(0) + "
m");
				mlayer.removeFeatures(mlayer.features); 
     }

-----Original Message-----
From: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org] On
Behalf Of Gérald Quintana
Sent: 19 March 2008 09:45 AM
To: users at openlayers.org
Subject: [OpenLayers-Users] Measuring tool

Hi,

Once I saw an example of Control to measure the length of a path
(rubber), but I can't find it anymore. Where is it?

I managed to do my own using the DrawFeature control and the
Curve.getLength() method but I miss the conversion factor to get the
distance in meters or kilometers, how can I do it?

Thanks for your help,
Gérald
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