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

[Pierre-Benoit Besse]

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
>
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