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<p class=MsoNormal><span style='color:#1F497D'>Hi Brian<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I had verified my code and there
is no issue setting the units correctly in C#. In fact, I see the same
issue setting the units to feet in map file directly. It seems there is some
rounding issue when the scale values are too large. Please see the ticket </span><a
href="http://trac.osgeo.org/mapserver/ticket/2890">http://trac.osgeo.org/mapserver/ticket/2890</a>.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:#1F497D'>Thanks a lot for your response.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Murty<o:p></o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Hulbert, Brian
[mailto:brian.hulbert@linquest.com] <br>
<b>Sent:</b> Tuesday, February 17, 2009 11:13 AM<br>
<b>To:</b> Murty Maganti; mapserver-users@lists.osgeo.org<br>
<b>Subject:</b> RE: [mapserver-users] Scalebar (and C# mapscript) issue<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:#1F497D'>Murty,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>It works fine for me using
MapServer 5.0.2 with an equirectangular projection using a WGS84 geoid
reference whether I’m zoomed to a world view or to a street-level
view. Be sure you are setting the scalebar units member accordingly in
C#. For example, scalebar.units = (int)OSGeo.MapServer.MS_UNITS.MS_FEET
to set the units to feet.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>However, I have noted that it
will appear garbled and squashed in width if you use units which are not
meaningful for the current zoomed area. In other words, don’t use
inches when zoomed to a city or world view…the numbers are too large to
display properly. Write a routine that sets the appropriate units
based on the delta degrees that you are showing. For example, if the user
chose English units (versus metric) and the current viewport spans roughly ~0.5
nautical miles, then set the units to inches. If the viewport is > 0.5
NM and < 1 NM, set the units to feet. Otherwise (the viewport spans
more than 1 NM), set the units to miles. You can tweak this idea to suit
your needs but this works well for me.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Brian<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoPlainText>NOTE: The views expressed are the author's and do not
necessarily reflect the official position of LinQuest Corporation or any of its
subsidiaries or the organization providing Internet access.<o:p></o:p></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
mapserver-users-bounces@lists.osgeo.org
[mailto:mapserver-users-bounces@lists.osgeo.org] <b>On Behalf Of </b>Murty
Maganti<br>
<b>Sent:</b> Friday, February 13, 2009 2:20 PM<br>
<b>To:</b> mapserver-users@lists.osgeo.org<br>
<b>Subject:</b> [mapserver-users] Scalebar (and C# mapscript) issue<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hello<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am having strange issue with scalebar. I have scalebar
displayed on map (embed) and scale units are set to miles. It has size of
200x10 pixels. It shows up fine on the map. Then at run time (using C#
map script), I just change the units to feet or meters and the bar size shrinks
(to almost 10 pixels length), which appears strange to me. Why would the
scalebar length changes by changing units. Is there any other setting I need to
set to maintain the same scalebar size?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>This works fine (or not noticeable) for maps which have
extents at city level. I am testing on map which displays Ontario province
(Canada). Also, you need to have projection elements defined at both map and
layer level. In my case, the projection is same (WGS 1984).<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks<o:p></o:p></p>
<p class=MsoNormal>Murty<o:p></o:p></p>
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