image mode and tiles

[Bart van den Eijnden]

Hi Stefanie,

your first problem probably appears in Internet Explorer (IE) only or not?
This is a known bug in IE.

There is also some discussion about this in the following bug report:

http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=1089

With respect to the tiles, I am not sure if I correcly understand your
problem, nothing is changed in the way your layer is drawn on the user
side (GUI), you are not gonna see every tile loaded as does e.g. Google
maps. Mapserver will look in the tileindex which tiles it needs to open
server-side, and it will open those in order to create 1 image. I would
suggest you to look into overviews though (gdaladdo).

Best regards,
Bart

> Hi list,
>
> I have set the output format to PNG and the image mode to RGBA in order to
> get enough colours to display raster and vector layers. But now
> 'transparency' must be ON and this turns the legend and map background
> gray
> (when no raster is displayed) and also affects some of my symbols. What's
> the best combination for output and image mode in this case? What can I do
> with the Alpha layer?? I have gone through the Raster-How-To but still
> don't
> get it strait.
>
> I am also struggling with tiles. I have chopped down a satellite image
> with
> the Gdaltindex program. Everything works fine but I expected to actually
> see
> how the scene is drawn tile by tile. Instead I still get the odd Venetian
> blinds (doing several passes and taking too long for the impatient user).
> I
> have not yet created low resolution overviews but -  is this the way tile
> visualization ought to be? The scene is resampled to the map projection so
> this might additionally slow down the process.
>
> Thanks for any comments,
> Stefanie Weykam
>
> Using MapServer/MapScript 4.2 on Win2000
>