Hello, I have a task I am trying to wrap my head around. Below is what I want to do. I am hoping someone can point me in the right direction. I am using OpenLayers as my mapping client and Mapserver.
I'd like to have an image layer that is dynamically drawn from request parameters. I have been able to do this with a singleTile=true layer, but then every time I move the map, change the browser window size, etc. the map draws again. I am pulling data from Postgresql/PostGIS and because of the large amount of data I have, these requests are extremely slow. I thought my solution could be drawing the image as singleTile=false. This seems to work better because the image tiles are drawn less often but now I have an unexpected tricky issue. My dynamic requests for maps produces a grid symbolized as quantiles by data counts by Mapserver. When I set singleTile=false, the requests are broken down into the tile requests and then each tile has its own quantiling result. It seems what I need is a way for OpenLayers to make a single tile request, have Mapserver make the single tile request from PostGIS, have either Mapserver or a tiling software break the single tile into multiple tiles and have OpenLayers handle the multiple tiles returned. But then maybe there is something I am missing. I hope my explanation makes sense and please let me know if this could be posted in a different forum. Thank you very much in advance for any advice. Scott -- View this message in context: http://osgeo-org.1560.n6.nabble.com/tiling-based-upon-dynamic-map-parameters-tp4910658p4910658.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users
