I can't speak for the Google projection but when using the WGS84 UTM zones (EPSG:32617 for my test) for the projection the measure tool for vectors is working accurately. I'd have to say that this is a projection based issue that might only be resolved by using proj4js. -- Nathan Gerber
On Sun, Sep 7, 2008 at 11:17 PM, Jennifer Strahan <[EMAIL PROTECTED]>wrote: > Thanks for the tip. I switched to satellite view and the measurement is > still pretty far off (around 20 acres when it should be 13 acres). Also > distances measured seem to be wrong. Any other ideas? > > Regards, > Jennifer > > Adams wrote: > > Keep in mind that at that zoom level, the width of the road is much more > than is shown there. > > > > The polygon that represents that area, was most likely constructed out of > street intersections, i.e. the centre of the roads.. just so it looks > better. > > > > If you switched to satellite view you could probably get a better > estimate with the measurement tool. > > > > ----- Original Message ----- > > From: "Jennifer Strahan" <[EMAIL PROTECTED]> > > To: [email protected] > > Sent: Sunday, September 7, 2008 3:03:56 PM (GMT-0400) America/Glace_Bay > > Subject: [OpenLayers-Users] Measure tool in 2.7 RC1 > > > > Hello, > > > > Thanks for including the measuring tool! I'm wondering if there are any > > guidelines for use that I should follow. I added a Google map layer to > > the measure example and am finding some error with the measurements. Is > > it possible that my map settings are wrong? > > > > I measured Alamo Square in San Francisco and the area result is around > > 92557 square meters (nearly 23 acres). The actual measurement should be > > around 13 acres. > > > > My test map is here: > > http://www.parkinfo.org/review/measure.html > > > > Any suggestions as to how I can adjust my settings to get the correct > > results? > > > > Thanks, > > Jennifer > > > > > > > > > > > > _______________________________________________ > > Users mailing list > > [email protected] > > http://openlayers.org/mailman/listinfo/users > > > > > > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users >
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