[mapserver-users] Possible tile_map_edge_buffer issue

[Charlie Allgrove]

Hi

 

I have an issue when using tile_map_edge_buffer functionality with mode=tile
on a Google map view which displays the whole world at zoom 0,1 or 2. It
probably manifests itself at higher zoom levels, but will be less obvious
(if at all) since I'm only rendering data over land.

 

In my map file I have (amongst others)
WEB

    METADATA

        "tile_map_edge_buffer" "32" # 32 pixel rendering buffer

        "http_max_age" "86400"

    END

  END

 

My development code is not on a publicly available server at the moment, so
I can't post a link but when I am looking at a Google map at zoom levels 0,1
or 2, the tiles consistently cut off approx half-way across the USA (see
attached screenshot). 

It seems that {tile=0 1 2} does not render with the buffering enabled, since
the buffered area extends effectively to a negative tile reference {-1 1 2}
which is illegal.

 

Is there any way around this - is it possible only to enable the buffer for
zooms >=3?

 

Cheers

 

Charlie

 

--

Charlie Allgrove

Senior Developer

 

Connection Services :: Business Mobility for a Wireless World

 

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