Ducky! Great to see you here -- don't be a stranger.
The problem with aligning singleTile to a grid is that as soon as you have the corner of the grid on the screen, all the sudden you are in a tiled mode only with larger tiles. It strikes me that for any use case that would require any kind of grid alignment at all, really you should be using a tiled mode only with perhaps larger tiles and smaller buffers. The use case that I see for single tile is for dynamic data -- data that is dynamic enough that you wouldn't want it cached at all, ever. David On 10/4/07, Dan Little <[EMAIL PROTECTED]> wrote: > > Yikes, first time poster! > > I think the speed to generate a single tile is wholely dependent on the > map-rendering engine and the dataset. > > For example, here at the City of Saint Paul, our streets layer is entirely > vector. I can generate a very very large tile with highly detailed streets > for the entire city using Mapserver in less than 1/3 of a second. Given the > nature of MapServer, and the size of the shapefile which stores our streets > layer, multiple tiles is much much slower (as the shapefile needs to be read > from disk and loaded to memory for each rendered tile). It would be nice to > have some of the effects of tiling without the high-cost it currently > presents in rendering performance. > > Dan "Ducky" Little > City of Saint Paul / Public Works / GIS > > > ----- Original Message ---- > From: Stephen Woodbridge <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > Cc: [email protected] > Sent: Wednesday, October 3, 2007 9:37:29 PM > Subject: Re: [OpenLayers-Dev] singleTile optimization > > [EMAIL PROTECTED] wrote: > > What do you think about aligning singleTile bounds to the grid to > > promote cacheability in the client? > > I think that this should be an option in the layer definition if it gets > done. I can see some benefits to doing this, but the down side is that > all images generated will be larger and slower to generate and the > singleTile option needs to support more than one use case in my mind > anyway. > > -Steve > _______________________________________________ > Dev mailing list > [email protected] > http://openlayers.org/mailman/listinfo/dev > > > ------------------------------ > Luggage? GPS? Comic books? > Check out fitting gifts for > grads<http://us.rd.yahoo.com/evt=48249/*http://search.yahoo.com/search?fr=oni_on_mail&p=graduation+gifts&cs=bz>at > Yahoo! Search. > > _______________________________________________ > Dev mailing list > [email protected] > http://openlayers.org/mailman/listinfo/dev > > -- ************************************ David William Bitner
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