white dashes at border between tiles within MapServer
pcreso at PCRESO.COM
Fri Jan 26 16:08:38 EST 2007
--- John Mitchell <mitchelljj98 at GMAIL.COM> wrote:
> When I have a shape file within MapServer that is pointing to a number of
> GeoTiff files I sometimes get a series of white dashes running at the border
> between GeoTiff files. I have brought these same GeoTiff files and
> displayed them within ArcExplorer2 and these white dashes do not show up.
I have found this to be the background showing through. The gap is caused by a
reprojected tile which is no longer rectangular, and a pixel can get lost at
the boundary. (Which doesn't mean this is the same thing you're seeing :-)
It seems to be a rounding issue.
My fix was to specify a background of 128/128/128 RGB values, as my tiles were
grayscale aerial images. While the dashed lines were still there, it made thenm
difficult to see :-)
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