[MAPSERVER-USERS] Mapserver bug when generating a tiled map with MapFish

[Eric Lemoine]

Hi. Do you have maxExtent set in your map options? OpenLayers
shouldn't request tiles outside the max extent. If it does it's a bug
in OpenLayers. Another guestion: what layer type do you use?
Layer.MapServer or Layer.WMS? If you use the former, make mapserver
work as a WMS server and try using Layer.WMS to see if that fixes the
problem. Again the ideal would be some example so that we con easily
reproduce your problem. Eric

2008/8/6, Pierre-Benoit Besse <besse.pb at gmail.com>:
> Unfortunately there is no connection to internet on the platform I develop
> on. All is done localy.
>
> I will try to be more precise.
> I am trying to display a shapefile representing the whole world (it's a
> shapefile from Global Insight plus if it helps). I use mapfish without
> 'singleTile: true' so the layer is generated by tiles.
>
> There is no problem in the beggining when the map is zoomed to max extent.
>
> The problem occurs when I begin zooming in and trying to display
> America/Asia. One of the "colums" of tiles is drawn across the -180°/+180°
> longitude line, and those tiles are generated entirely blank (white, not
> even transparent).
>
> When I get the properties of the image (right-click on the blank tile ->
> Properties) and I search in the "Location" of the image I can find :
> mapext=179.296875+44.296875+*225.703125*
> +90.703125&imgext=179.296875+44.296875+*225.703125*+90.703125
> So I guess the problem comes from that, MapServer doesn't recognise
> longitude greater than 180 or lower than -180.
> If I'm right I would appreciate any hint on how to handle this...
>
> Otherwise it may be a mapfish issue, maybe mapfish should always generate
> tiles with borders right on -180 / +180. This is the case at the beggining,
> lef tile has mapext=90+0+180+90 and right tile has mapext=-180+0+-90+90.
> But whenever I begin zooming in it goes awry, the border of tiles is no
> longer right on -180/+180 and some tiles are generated white by MapServer.
>
> If someone needs more informations I'm ready to give it.
>
> Best regards,
>
> PB
>
> 2008/8/6 Eric Lemoine <eric.c2c at gmail.com>
>
>> On Wed, Aug 6, 2008 at 2:28 PM, Pierre-Benoit Besse <besse.pb at gmail.com>
>> wrote:
>> > Isn't there anyone to help me with this ?
>> >
>> > 2008/8/4 Faldor <besse.pb at gmail.com>
>> >>
>> >> Hi all,
>> >>
>> >> I use Mapserver with mapfish for the client side to display shapefiles
>> >> which
>> >> I generated using ogr2ogr.
>> >>
>> >> The problem is when I try to display a tiled layer (mapfish singleTile
>> >> property set to 'false'). Some tiles are generated by mapserver
>> >> entirely
>> >> blank !
>> >>
>> >> After a few researches I think it is due to the fact that those tiles
>> are
>> >> extended "across" the -180°/+180° line.
>> >> For exemple, here is the imgext property from one of the calls to
>> >> MapServer
>> >> which render a blank tile :
>> >> imgext=178.59375+-1.40625+271.40625+91.40625
>> >>
>> >> Do you know of a way to fix this ?
>>
>> This is not enough information for anyone to help you. Could you
>> provide a link or a web page to help people see what's going on?
>>
>> --
>> Eric
>>
>