Hi Jean-Francois,<br><br>indeed the scale calculation has changed in mapscale.c, see also:<br><br><a href="http://trac.osgeo.org/mapserver/ticket/2300">http://trac.osgeo.org/mapserver/ticket/2300</a><br><br>I fear there is not much to do about it ... but it should be added to the migration guide IMHO.<br>
<br>Best regards,<br>Bart<br><br><div class="gmail_quote">On Feb 5, 2008 10:56 PM, Doyon, Jean-Francois <<a href="mailto:jdoyon@nrcan.gc.ca">jdoyon@nrcan.gc.ca</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial" size="2">G'day y'all ...</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial" size="2"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial" size="2">Posted this to the user's list but had no luck ...
anyone?</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial" size="2"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial" size="2">We might have to delay upgrade to 5 and AGG by months if
there are indeed undocumented changes to the way scale is calculated
:(</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial" size="2"></font></span> </div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial" size="2">Thanks,</font></span></div>
<div dir="ltr" align="left"><span><font color="#0000ff" face="Arial" size="2">J.F.</font></span></div><br>
<div dir="ltr" align="left" lang="en-us">
<hr>
<font face="Tahoma" size="2"><b>From:</b> UMN MapServer Users List
[mailto:<a href="mailto:MAPSERVER-USERS@LISTS.UMN.EDU" target="_blank">MAPSERVER-USERS@LISTS.UMN.EDU</a>] <b>On Behalf Of </b>Doyon,
Jean-Francois<br><b>Sent:</b> February 4, 2008 10:12<br><b>To:</b>
<a href="mailto:MAPSERVER-USERS@LISTS.UMN.EDU" target="_blank">MAPSERVER-USERS@LISTS.UMN.EDU</a><br><b>Subject:</b> [UMN_MAPSERVER-USERS] Upgrade
to MapServer 5.0.2 from 4.8.1: extent/scale calculation
changes?<br></font><br></div><div><div></div><div class="Wj3C7c">
<div></div>
<p><font face="Arial" size="2">Hello,</font> </p>
<p><font face="Arial" size="2">Although all the cartographic testing has been done,
I just tested for the first time upgrading 4.8.1 to 5.0.2 with my JavaScript
mapping UI, and have discovered something troubling:</font></p>
<p><font face="Arial" size="2">For a given map file, the final extent and scale
calculations are different between the two versions!</font> </p>
<p><font face="Arial" size="2">For the same mapfile "105.map" with:</font> </p>
<p><font face="Courier New" size="2">EXTENT -2750564.75 -936638.5 3583872.5
4673125</font> </p>
<p><font face="Arial" size="2">With 4.8.1:</font> </p>
<p><a href="http://atlas.nrcan.gc.ca/cgi-bin/mapserv?map=/home/atlas/mapdata/english/105.map&map_web_template=/home/atlas/mapdata/to_zope_new.html&mapsize=428+380&map_scalebar_imagecolor=255+255+255" target="_blank"><u><font color="#0000ff" face="Arial" size="2">http://atlas.nrcan.gc.ca/cgi-bin/mapserv?map=/home/atlas/mapdata/english/105.map&map_web_template=/home/atlas/mapdata/to_zope_new.html&mapsize=428+380&map_scalebar_imagecolor=255+255+255</font></u></a></p>
<p><font face="Arial" size="2">-2750564.750000 -943773.286215 3583872.500000
4680259.786215</font> <br><font face="Arial" size="2">41953025.267029</font>
</p><br>
<p><font face="Arial" size="2">With 5.0.2:</font> </p>
<p><a href="http://dev.atlas.gc.ca/cgi-bin/mapserv502atlas?map=/home/atlas/mapdata/english/105.map&map.web=TEMPLATE+/home/atlas/mapdata/to_zope_new.html&mapsize=428+380&map.scalebar=COLOR+255+255+255" target="_blank"><u><font color="#0000ff" face="Arial" size="2">http://dev.atlas.gc.ca/cgi-bin/mapserv502atlas?map=/home/atlas/mapdata/english/105.map&map.web=TEMPLATE+/home/atlas/mapdata/to_zope_new.html&mapsize=428+380&map.scalebar=COLOR+255+255+255</font></u></a></p>
<p><font face="Arial" size="2">-2750564.750000 -942941.431206 3583872.500000
4679427.931206</font> <br><font face="Arial" size="2">42051275.911682</font> </p>
<p><font face="Arial" size="2">That scale change is big enough to break all our
min/max scale ranges and so on :( (on hundreds of mapfiles)</font> </p>
<p><font face="Arial" size="2">I've looked through HISTORY.TXT and the Migration
Guide but am not seeing anything about this (All I saw was a change in scale
calculation for PHP?)</font></p>
<p><font face="Arial" size="2">Help?</font> </p>
<p><font face="Arial" size="2">Jean-François Doyon</font> <br><font face="Arial" size="2">Data Dissemination Division | Division de la diffusion des données</font>
<br><font face="Arial" size="2">Data Management and Dissemination Branch | Direction
de la gestion et de la diffusion des données</font> <br><font face="Arial" size="2">Earth Sciences Sector | Secteur des sciences de la Terre</font> <br><font face="Arial" size="2">Natural Resources Canada | Ressources naturelles Canada</font>
<br><font face="Arial" size="2">Ottawa, Canada K1A 0E9</font> <br><font face="Arial" size="2"><a href="mailto:jdoyon@nrcan-rncan.gc.ca" target="_blank">jdoyon@nrcan-rncan.gc.ca</a></font> <br><font face="Arial" size="2">Telephone |
Téléphone 613-992-4902</font> <br><font face="Arial" size="2">Facsimile |
Télécopieur 613-947-2410</font> <br><font face="Arial" size="2">Teletypewriter |
Téléimprimeur 613-996-4397</font> <br><font face="Arial" size="2">Government of
Canada | Gouvernement du Canada</font> </p></div></div></div>
</blockquote></div><br>