[mapserver-users] Re: Raster Strategies Examples

[Edi.Karadumi]

Thanx to you my questions are comming to an end [?]

Three more last things

Should i retile the new mosaiced overview? Meaning should i create smaller
size tiles of the new mosaic?

And how can i find in which scale should i switch layers? So what will be
the maxscale of the original layer?

if ill still have performance problems, or ill get 1-2 terabytes of data
more should i make another mosaic with 0.08*16 or 0.08*8, or is there
another strategy?



On Thu, Aug 19, 2010 at 2:46 PM, Frank Warmerdam [via OSGeo.org] <
ml-node+5440051-1962745825-182671 at n2.nabble.com<ml-node%2B5440051-1962745825-182671 at n2.nabble.com>
> wrote:

> Edi.Karadumi wrote:
> > Sorry to bother again, when i use gdal_merge.py the part -ps 160 160,
> thats
> > the pixel dimension and i get an image 1kb. The pixel size of the
> original
> > file is 0.08 meters. So i think i should use 0.08x32 in the gdal_merge.py
>
> > command?
>
> Edi,
>
> If the original resolution is 8cm then the 1/32nd overview should indeed
> have a pixel size of 0.08x32 or 2.56m.
>
>  > And how many tiles should i merge together? Now i have 2T images
>  > and 2000Gb/32 = 62Gb the rezult image. Should i merge them all together
> and
>  > than recreate tiles? Even if i had 1200gb, 1200/32=37.5gb for an image
> not
>  > 1gb. That is still an image size that cant be handled
>
> Note that the 1/32nd overview is reduced by a factor of 32 in x and y
> so overall it will be original_size/(32*32).  So 2TB would reduce to
> about 1.95GB.
>
> Best regards,
> --
> ---------------------------------------+--------------------------------------
>
> I set the clouds in motion - turn up   | Frank Warmerdam, [hidden email]<http://user/SendEmail.jtp?type=node&node=5440051&i=0>
> light and sound - activate the windows | http://pobox.com/~warmerdam
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>
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