|
|
| GeoCommunity Mailing List |
| |
| Mailing List Archives |
| Subject: | RE: GISList: PC Memory requirements for Manifold? |
| Date: |
08/16/2002 06:38:17 PM |
| From: |
Dimitri Rotow |
|
|
>
> Anyone out there have experience with Manifold?
>
> I'm going to re-project VMAP0 and 30" DEM data for large
> patches of the world, and I'm wondering how much memory (RAM)
> I need.
>
> The manifold web site says "up to 4 times the data size"
> for some operations. What is first-hand experience?
>
That's free disk space, to allow for all of the TEMP files needed to enable
users to abandon projects, undo edits, etc. That's not RAM required.
> I'm concerned that manifold tries to load large raster
> sets "entire", rather than loading sub-tiles as PaintShop Pro
> does for big images. In PaintShop Pro, loaded raster data is
> worked on a section at a time, I think, not all at once.
>
Nigel,
Manifold is not a tiling system, which is good news if you want fast
performance for data sets in the up to 2GB range and bad news if you are
working with data sets larger than 2GB.
As to why Manifold does this, see the "Using RAM and other Machine
Resources" essay (watch the line wraps!) at:
http://exchange.manifold.net/manifold/manuals/5_userman/mfd50Using_RAM_and_o
ther_Machine_Reso.htm
For memory requirements in general, including practical advice, see the
"Memory Requirements" topic in the user manual. If you haven't downloaded
SP2 or SP3 you won't have this updated topic in your Help file. Online, it
is at:
http://exchange.manifold.net/manifold/manuals/5_userman/mfd50Memory_Requirem
ents.htm
If you want to work with truly immense projects, the next update to Manifold
will allow use of unlimited size projects where any one image (they can be
tiled, of course, in a map) can be up to 4 gigabytes in size. This will be
made available for 32 bit systems later this year.
Also, for specific technical discussion on Manifold, the Manifold-L list is
a good place to get user opinions... it's a very active community.
Cheers,
Dimitri
To unsubscribe, write to gislist-unsubscribe@geocomm.com
________________________________________________________________________
Setup a GeoCommunity Account and have access to FAST DataDownloads
and Premium Career Posting at a discounted rate!
https://www.geocomm.com/cgi-bin/accounts/login
On-line Archives available at
http://spatialnews.geocomm.com/community/lists/
|
|
Sponsored by:
For information
regarding
advertising rates
Click Here!
|
