Steven De Vriendt wrote:
I have about 50 ECW-files which I like
to serve via WMS.
I'm using following OUTPUTFORMAT:
OUTPUTFORMAT
NAME PNG24
DRIVER "GD/PNG"
MIMETYPE "image/png"
EXTENSION PNG
FORMATOPTION "INTERLACE=OFF"
IMAGEMODE RGBA
TRANSPARENT ON
END
Image quality is good, but the performance is not what I'd like it to be.
Can anyone help me adjusting these parameters ?
Steven,
On issue is of course whether it is really the input or output that is
slowing things down. PNG24 output is generally quite expensive computationally
and folks have often found JPEG better for 24bit output. JPEG also produces
much smaller files which is generally good.
I'd add that each ECW that has to be opened and any imagery read from will
be expensive. If you can it is better with ECW to make a single large
mosaic unless you know that views are constrained in such a way that allmost
all requests will only touch one file.
Best regards,
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