[OpenLayers-Users] lower part of tiles does not load in IE

[Bart van den Eijnden (OSGIS)]

Okay, done quite a bit of debugging on this.

My map is 694x464 pixels. Tilesize is 256. Buffer is 1.

Initially, a grid of 6x4 tiles is created. When zooming in to the zoom level
which has this problem, only 6x3 tiles are created (so one of the rows is
removed from the grid).

It can be quickly patched in the _initTiles function:

    _initTiles:function() {

        // work out mininum number of rows and columns; this is the number
of
        // tiles required to cover the viewport plus one for panning
        var viewSize = this.map.getSize();
        var minRows = Math.ceil(viewSize.h/this.tileSize.h) + 1;
        var minCols = Math.ceil(viewSize.w/this.tileSize.w) + 1;

by replacing + 1 with + 2*this.buffer.

Maybe/hopefully :-) someone more knowledgeable of this part of the code can
determine the right fix for this.

Best regards,
Bart

--
Bart van den Eijnden
OSGIS, Open Source GIS
http://www.osgis.nl


--------- Oorspronkelijk bericht --------
Van: Bart van den Eijnden OSGIS <bartvde at osgis.nl>
Naar: users at openlayers.org <users at openlayers.org>
Onderwerp: lower part of tiles does not load in IE
Datum: 02/07/07 14:13

> 
> Hi list,
> 
> did anybody ever see the following problem before? I am using OL 2.4.
> 
> I have an application with a baselayer of tiled WMS served by tilecache.
On
> top are a few WMS overlays.
> 
> In Internet Explorer sometimes the lower rim of the application does not
> load the tiles. If I pan something like 50px up they will appear. The
> pattern is repetitive when panning towards the north. Firefox does not
have
> this problem. It is always the lower part which won't load.