[OpenLayers-Users] Measure tool in 2.7 RC1

[Nathan Gerber]

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 <jennifer at greeninfo.org>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" <jennifer at greeninfo.org>
> > To: users at openlayers.org
> > 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
> >
> >
> >
> >
> >
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> >
> >
>
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