Thanks,<br><br>So using force option in tile.php is not going to work in this situation. Any other way to have mapserver force the tile to be redrawn per refresh_interval then? I mean if and only if the tile has changed? From the init.php it looks as if you use the redraw_interval option and have tilesource set to redraw should do it but it doesnt appear to work. I mean I can manually copy over a new version of a dbf file and verify that the file timestamp has changed but whenever the refresh takes place it isn't updated. I manually need to remove the tiles to have them redrawn again. Any ideas?<br><br>Thanks, S.D.<br><br><b><i>Paul Spencer <pspencer@dmsolutions.ca></i></b> wrote:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> Samuel,<br><br>setTile is called once for each tile on each layer. Depending on <br>your tile size and viewport size, you could have as many as 20-30 <br>tiles per layer. The
minimum number of tiles per layer would be 9 (3 <br>wide and 3 high) but typically ends up being larger. Don't forget <br>that there are some tiles off screen. For instance, if your viewport <br>is 600 x 600 pixels and your tiles are 200x200, you will likely end <br>up with 5 or 6 tiles wide and 5 or 6 tiles high, thus 25-36 tiles per <br>layer.<br><br>Cheers<br><br>Paul<br><br>On 28-Jul-06, at 8:47 PM, Samuel Doyle wrote:<br><br>> Hi,<br>><br>> I was doing some debugging related to the performance of passing <br>> the force option to tile.php and noticed that this setTile routine <br>> was being invoked many more times then I expect. I mean I have only <br>> three layers added to my map file that I want to have the force <br>> redraw option applied to but it appears that these layers are being <br>> set many more times over. Can someone explain what is happening here?<br>><br>> Thanks, S.D.<br>>
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