<div>Hello all,</div><div> </div><div>I'm currently trying to carry out a selection of some polygon data using MapServer. When I query a dataset held in a shapefile, everything is working ok and the expected polygons are returned in the selection. However, when I try to query data held in a SQL Server 2008 database, I get some very strange results. The bounding box expands compared to the selection polygon I have drawn, and multipart polygons are returned instead of the correct features. The dataset is a county dataset for England and Wales. Some example co-ordinates are below, having tried to select Bedfordshire (BBOX 489373 , 212863 to 527085 , 270534)</div>
<div> </div><div>SHP results in a BBOX (445860 , 178402 to 571833 , 318013) which covers the county plus those that intersect my original polygon</div><div>SQL results in a BBOX 386080 , 212863 to 527085 , 270534) which is massively extended from the original polygon, stretching from Gloucestershire to the North East coast of England</div>
<div> </div><div> </div><div>Are there any differences in the map file or layer setup that could explain this difference, and is there a solution? I have posted the issue to stackexchange but at that time had not realised it was a difference between shp and sql:</div>
<div> </div><div><a href="http://gis.stackexchange.com/questions/37559/openlayers-spatial-filter-polygon-problem">http://gis.stackexchange.com/questions/37559/openlayers-spatial-filter-polygon-problem</a></div><div> </div>
<div>Regards</div><div> </div><div>Pete</div>