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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Jerl<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Eurueka! “+over” did it!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks, I owe you one.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Chris <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> jerl.simpson@craniumjuice.com [mailto:jerl.simpson@craniumjuice.com] <b>On Behalf Of </b>forums<br><b>Sent:</b> 01 February 2012 13:17<br><b>To:</b> Chris Green<br><b>Cc:</b> mapserver-users@lists.osgeo.org<br><b>Subject:</b> Re: [mapserver-users] disappearing point features in North America<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Chris:<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I had a similar issue, it was suggested to me to add "+over" to my epsg definitions file.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Mine now looks like:<o:p></o:p></p></div><div><p class=MsoNormal><4326> +proj=longlat +ellps=WGS84 +datum=WGS84 +over +no_defs <><o:p></o:p></p></div><div><p class=MsoNormal><900913> +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext +over +no_defs <><br><br>That seemed to make a difference, but I also upgraded PROJ4 at the same time.<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><br>Jerl<o:p></o:p></p><div><p class=MsoNormal>On Wed, Feb 1, 2012 at 5:38 AM, Chris Green <<a href="mailto:chris.green@ibstv.co.uk">chris.green@ibstv.co.uk</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I have a problem that may be down to OpenLayers or to Mapserver, or (just as likely) to me. Basically I am using OL to request WMS maps from Mapserver, and the map consists of point features with a global spread, typically around 100 points in each map. The points are defined in a table which has lat/lon in decimal degrees, and these are converted to 900913 by Mapserver where my mapfile has an overall projection of epsg: 900913 but the points layer has projection epsg: 4326.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>The map is defined in OL with extents: <span style='font-size:10.0pt'>-</span>20037508.34, -20037508.34, 20037508.34, 20037508.34 and the mapfile has the same extents applied.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>This all works fine when a map is first displayed, all of the points are present on the map. However when I scroll the map left or right there is a ‘dead spot’ where all the points in North America disappear and then re-appear, either side of the dead spot. Looking with Firebug at the bounding box that OL uses to request the map from Mapserver I can see that the points disappear when the bounding box is between left bounds of about -23700000 and -33700000. Only the points in North America are affected, never those in Europe or Asia. <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I have been wrestling with this for quite a while, experimenting with extents etc, all without any effect. Does anyone recognise where my problem may lie, or else have any suggestions how to diagnose what is going on?<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#888888'> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#888888'> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#888888'>Chris <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#888888'> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#888888'> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#888888'> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#888888'> <o:p></o:p></span></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>mapserver-users mailing list<br><a href="mailto:mapserver-users@lists.osgeo.org">mapserver-users@lists.osgeo.org</a><br><a href="http://lists.osgeo.org/mailman/listinfo/mapserver-users" target="_blank">http://lists.osgeo.org/mailman/listinfo/mapserver-users</a><o:p></o:p></p></div><p class=MsoNormal><br><br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <br>A computer without Windows is like chocolate cake without mustard.<o:p></o:p></p></div></div></body></html>