Details Ticket 3081


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Serial Number 3081
Subject Raster with 256 levels per color fails to show
Area grass6
Queue grass
Requestors marc.girondot@ese.u-psud.fr
Owner none
Status open
Last User Contact Mon Mar 14 00:59:25 2005 (3 yr ago)
Current Priority 30
Final Priority 70
Due No date assigned
Last Action Wed Sep 27 15:00:26 2006 (2 yr ago)
Created Thu Mar 10 17:07:24 2005 (3 yr ago)

Transaction History Ticket 3081


Thu, Mar 10 2005 17:07:24    Request created by guest  
Subject: Raster with 256 levels per color fails to show

Platform: Mac OSX
grass obtained from: Trento Italy site
grass binary for platform: Downloaded precompiled Binaries
GRASS Version: 6.0.cvs 20050212

Rasters created with r.composite and 256 levels systematically fails to show.
It works with 32 levels.
Mon, Mar 14 2005 00:59:25    Mail sent by glynn@gclements.plus.com  
Return-Path <glynn@gclements.plus.com>
Delivered-To grass-bugs@lists.intevation.de
From Glynn Clements <glynn@gclements.plus.com>
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Message-ID <16948.54229.564545.146444@gargle.gargle.HOWL>
Date Sun, 13 Mar 2005 23:59:17 +0000
To Request Tracker <grass-bugs@intevation.de>
Cc grass5@grass.itc.it
Subject Re: [GRASS5] [bug #3081] (grass) Raster with 256 levels per color fails to show
In-Reply-To <20050310160724.83DCC1006A5@lists.intevation.de>
References <20050310160724.83DCC1006A5@lists.intevation.de>
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Request Tracker wrote:

> this bug's URL: http://intevation.de/rt/webrt?serial_num=3081

> Subject: Raster with 256 levels per color fails to show

> GRASS Version: 6.0.cvs 20050212

> Rasters created with r.composite and 256 levels systematically fails
> to show. It works with 32 levels.

Using "r.composite ... levels=256" will result in rasters with huge
colour tables (65536 rules). Operations which use the colour table
(e.g. d.rast) may be slow and/or consume large amounts of memory
(possibly more memory than is available, resulting in the program
terminating abnormally).

-- 
Glynn Clements <glynn@gclements.plus.com>


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