<div dir="ltr"><br><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Jan 10, 2013 at 7:48 AM, Jan Hartmann <span dir="ltr"><<a href="mailto:j.l.h.hartmann@uva.nl" target="_blank">j.l.h.hartmann@uva.nl</a>></span> wrote:<br>
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Yes, this is the difficult solution. It works, but I was thinking in
another direction. As Bart pointed out, it is possible to put
multiple Mouseposition controls with different DisplayProjections on
a page by means css classes. This means that I can influence the
position of these controls and their projected coordinate values
without any other formating. However, I would also like to be able
to change to format of a lon-lat value to degrees-minutes-seconds.
Is there a way to get at the numeric value of a MousePosition
control and alter it?<br>
<br>
There are other possibilities for this. Older maps often have
national central meridians, like Paris, Amsterdam, Djakarta. To see
the lon-values on those map in Greenwich values, all lon values need
to be added with a constant. It would be nice if that could be done
automatically via the MousePointer control.<span class=""><font color="#888888"><br></font></span></div></blockquote><br><br></div><div class="gmail_quote">My feeling is that the centeral meridian should be handled by the coordinate transformation. In my applications I display the map in its native local coordinate system. I show these in the the first (left) coordinate display. I then transform that to lat/long (both decimal and DMS) and display that in the middle, and then transform lat/long to UTM which is displayed to the right.<br>
</div><div class="gmail_quote"><br clear="all"></div>So three proj-style coordinate system definitions have to exist: local, lat/long, UTM. The local one would handle differences in central meridian.<br><br></div><div class="gmail_extra">
Best regards,<br>Rich<br><br>-- <br>Richard Greenwood<br><a href="mailto:richard.greenwood@gmail.com">richard.greenwood@gmail.com</a><br><a href="http://www.greenwoodmap.com">www.greenwoodmap.com</a>
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