[josm-dev] zoom support in new wms plugin

[Petr Dlouhý]

On Fri, 19 Dec 2008 22:35:46 +0100, Frederik Ramm <frederik at remote.org> wrote:

This was discussed once in this list.
Yes, this is by design, the plugin is downloading the tiles in one zoom level per layer. It is the only logical solution, because WMS can send different data for different zoom level. It also saves amount of transfered data.
Maybe you just didn't notice the "change resolution" item in the context menu of the layer. It is not placed intuitively, but I didn't find better place for that button.
When you zoom out too much, the plugin stops downloading the tiles.

> Hi,
>
>     I haven't followed the new WMS plugin development much but it seems
> to be a good development - thank you to all involved. Someone on the
> talk list has also written he's quite happy with it.
>
> There is one thing that confounds me. It seems that the scale for a
> given layer is fixed the moment I download it initially. When I then
> zoom in, everything is "pixelized" from blowing up the bitmap (something
> that a normal WMS client would do differently but it is acceptable).
> However when I then, while zoomed in, pan off the loaded area into the
> void, the data that is loaded from the WMS is *still* on the original
> scale and thus pixelized, as if I had zoomed out, then loaded, then
> zoomed in again.
>
> Is this by design? If I do a new WMS download while zoomed in, I get a
> second layer (same name) with more details. What happens if I now zoom
> out and pan around, will JOSM then try and fetch gargantuan bitmaps and
> scale them down?
>
> Bye
> Frederik
>



-- 
Petr Dlouhý