Disappearing points when BBOX minx is >= 0

[Andrew Larcombe]

Hi Mapserver-users:

A bit of an odd one for you. Mapserver handling WMS requests with two 
vector layers, one line, one point. Setting the minimum easting on the 
bounding box to less than zero and both layers display. Setting it to 
greater than zero and the points disappear!

This url displays both layers just fine:
http://andrewlarcombe.co.uk/cgi-bin/wms?LAYERS=vmap0&FORMAT=image/png&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG:4326&BBOX=-1,-90,179,90&WIDTH=256&HEIGHT=256

Shift the request east 1 degree and the points disappear:
http://andrewlarcombe.co.uk/cgi-bin/wms?LAYERS=vmap0&FORMAT=image/png&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG:4326&BBOX=0,-90,180,90&WIDTH=256&HEIGHT=256

The layers are sublayers of 'vmap0', and can be accessed individually by 
substituting quakes (the point layer) or coast (the line layer) for 
vmap0. Both layers are shapefiles.


ogrinfo seems to report fine:
ogrinfo -al -spat 0 -90 180 90 latestearthquakes.shp | more
INFO: Open of `latestearthquakes.shp'
using driver `ESRI Shapefile' successful.

Layer name: latestearthquakes
Geometry: 3D Point
Feature Count: 35
...etc

I'm really not sure what's going on here. Has anyone seen anything 
similar? If not I'll have a dig around in the source.

Thanks,

Andrew


System info:
MapServer version 4.8.3 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP 
OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER 
INPUT=EPPL7 INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE

gdal-1.3.1 with ogr