Hi Jerl
Eurueka! "+over" did it! Thanks, I owe you one. Chris From: jerl.simp...@craniumjuice.com [mailto:jerl.simp...@craniumjuice.com] On Behalf Of forums Sent: 01 February 2012 13:17 To: Chris Green Cc: mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] disappearing point features in North America Chris: I had a similar issue, it was suggested to me to add "+over" to my epsg definitions file. Mine now looks like: <4326> +proj=longlat +ellps=WGS84 +datum=WGS84 +over +no_defs <> <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 <> That seemed to make a difference, but I also upgraded PROJ4 at the same time. Jerl On Wed, Feb 1, 2012 at 5:38 AM, Chris Green <chris.gr...@ibstv.co.uk> wrote: 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. The map is defined in OL with extents: -20037508.34, -20037508.34, 20037508.34, 20037508.34 and the mapfile has the same extents applied. 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. 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? Chris _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users -- A computer without Windows is like chocolate cake without mustard.
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