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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I sent this out twice and went to view the
text on line to see if anyone had responded and the message was
“scrubbed”. I think there might be a problem with my logo
signature. I’m trying to send this again (without the logo) to see if it
goes through properly.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Sorry for any inconvenience,</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>jtm </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Tahoma><span
lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>-----Original
Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> McGraw, Joanne <br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, August 16, 2005
3:00 PM<br>
<b><span style='font-weight:bold'>To:</span></b> 'chameleon@lists.maptools.org'<br>
<b><span style='font-weight:bold'>Subject:</span></b> Locate widget - unknown
projection id</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>I’m just passing along some
findings in the hopes that if anyone is aware that my workaround will cause
other problems they’ll let me know.</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>In the Locate widget, the lines that
use the following code: ms_newprojectionobj ($szTmpMapProj);</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>where $szTmpMapProj was returned by
$oMap->getProjection (); returns an error when the projection returned from
$oMap is a custom projection.</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>My application’s map has a
custom projection. When I use the Locate widget and try to zoom in, for
example, to a selected location I get an error “</span></font>msProcessProjection():
unknown projection id”.<font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'> The problem turned out to be that the string returned
by the Map’s getProjection() could not be used as input to instantiate a
new projection object with ms_newprojectionobj().</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>In my application, after:</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>$szTmpMapProj = $oMap->getProjection
();</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>$szTmpMapProj holds the string “proj=lcc
+lat_0=0 +lat_1=49 +lat_2=77 +lon_0=-91.8666 +datum=NAD83”</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>The ms_newprojectionobj() function
expects commas between each of the projection definition items in the string it
is passed. So, to get around the problem, I inserted a line of code to replace
the spaces between all the parameters with commas, like this:</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>
$szTmpMapProj = $oMap->getProjection ();</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>
$szTmpMapProj = str_replace(" ", ",", $szTmpMapProj);</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>
:</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>
$projOutObj = ms_newprojectionobj ($szTmpMapProj);</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>And it worked. This won’t
affect any returned epsg projections, but will if affect some other type of
returned projection? </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>I’m not certain if this would
be considered a MapServer problem or a Chameleon problem (that the returned
string from getProjection() cannot then be used to create a new projection
object). It is certainly possible (and I have no idea) that the string returned
by getProjection() CAN be used as it is returned for a custom projection when
it is passed to some other function. In that case, fixing the returned string
to include the commas would simply break something else. Certainly this is a
problem in Chameleon’s Locate widget if the map has a custom projection.</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Cheers,</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>jtm</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Joanne T. McGraw<br>
Spatial Data Visualization Specialist / Spécialiste en visualisation des données
spatiales<br>
Agriculture and </span></font><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>Agri-Food</span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>Canada</span></font><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> /
Agriculture et Agroalimentaire </span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Canada</span></font><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'><br>
Telephone/Téléphone: (613) 759-6103<br>
Facsimile/Télécopieur: (613) 759-1937<br>
</span></font><font size=2 face=Arial><span style='font-size:10.0pt;font-family:
Arial'>960 Carling Ave, #1136</span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><br>
</span></font><font size=2 face=Arial><span style='font-size:10.0pt;font-family:
Arial'>Ottawa</span></font><font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'>, </span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Ontario</span></font><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'><br>
K1A 0C6</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><a href="mailto:mcgrawj@agr.gc.ca">mcgrawj@agr.gc.ca</a></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
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