Ducky!<br><br>Great to see you here -- don't be a stranger.<br><br>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.
<br><br>David<br><br><div><span class="gmail_quote">On 10/4/07, <b class="gmail_sendername">Dan Little</b> <<a href="mailto:danlittle@yahoo.com">danlittle@yahoo.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;"><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;">Yikes, first time poster!<br><br>I think the speed to generate a single tile is wholely dependent on the map-rendering engine and the dataset.
<br><br>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.
<br><br>Dan "Ducky"
Little<br>City of Saint Paul / Public Works / GIS<div><span class="e" id="q_1156afd14844a352_1"><br><br><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">----- Original Message ----<br>
From: Stephen Woodbridge <<a href="mailto:woodbri@swoodbridge.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">woodbri@swoodbridge.com</a>><br>To: <a href="mailto:pspencer@dmsolutions.ca" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
pspencer@dmsolutions.ca</a><br>Cc: <a href="mailto:dev@openlayers.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">dev@openlayers.org</a><br>Sent: Wednesday, October 3, 2007 9:37:29 PM<br>Subject: Re: [OpenLayers-Dev] singleTile optimization
<br><br><div><a href="mailto:pspencer@dmsolutions.ca" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">pspencer@dmsolutions.ca</a> wrote:<br>> What do you think about aligning singleTile bounds to the grid to
<br>> promote cacheability in the client?<br><br>I think that this should be an option in the layer definition if it gets <br>done. I can see some benefits to doing this, but the down side is that <br>all images generated will be larger and slower to generate and the
<br>singleTile option needs to support more than one use case in my mind anyway.<br><br>-Steve<br>_______________________________________________<br>Dev mailing
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