Re: [las_users] Map Scale and Palettes.

To: "Oostra, Daniel H. (LARC-E302)[SCIENCE SYSTEMS AND APPLICATIONS, INC]" <daniel.h.oostra@xxxxxxxx>
Subject: Re: [las_users] Map Scale and Palettes.
From: Ansley Manke <ansley.b.manke@xxxxxxxx>
Date: Fri, 11 Feb 2011 10:58:34 -0800
Cc: "las_users@xxxxxxxx" <oar.pmel.las_users@xxxxxxxx>
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Hi Daniel,

You're right. Ferret expects the RGB values to be percentages, so ifyou divide all your values by 255 the palette should work as youexpect. We might also need to think about a setting for the colorlevels which you could put into the dataset configuration, so that thesetting for minimum,maximum, delta-level is done in a way that works forthis data and palette.


Ansley

On 2/11/2011 9:45 AM, Oostra, Daniel H. (LARC-E302)[SCIENCE SYSTEMS ANDAPPLICATIONS, INC] wrote:

Hello LAS users,

I'm trying to create a plot for Surface Scene Type data that is made up of 18 biomes.  I'd like to do two things:

1.  How can I map dataset values to specific colors?  The problem I'm seeing is that when I have a good palette for the entire region(global) zoomed out, the color changes for smaller regions... for example, if I use the blue_brown palette, the water bodies are blue from a macro view but once you zoom into a smaller area, the color changes to brown.  I'd like it to stay blue.  I've tried creating my own palette surface_scene.spk to address this:

Surface_scene.spk

RGB_Mapping By_level

! Level    Red  Green   Blue
       1  51.0   153.0    0.0
       2  51.0   204.0    0.0
       3  51.0   255.0    0.0
       4 102.0   255.0    0.0
       5 102.0   204.0    0.0
       6 102.0   153.0    0.0
       7  51.0   102.0    0.0
       8 102.0   102.0    0.0
       9  51.0   255.0   51.0
      10  51.0   153.0   51.0
      11  51.0   204.0  204.0
      12 102.0   153.0  102.0
      13 255.0     0.0  102.0
      14 102.0   204.0  153.0
      15 255.0   255.0  255.0
      16 102.0    0.0    0.0
      17   0.0    0.0  255.0
      18 204.0   255.0  255.0
      19 204.0   255.0  255.0
      20 204.0   255.0  255.0
However, it seems that the rgb values are percents rather than hard rgb values so I'm getting out of bounds errors when I run a plot.  Has anyone had success with doing this?

2.  On this same dataset, there are 1-18 distinct biomes.  When I create a plot, I see values that range from 7.5 to 20.5 on the map scale.  Is it possible to fix the map scale values to show a precise range?  In this case 1-18, there are no decimal values in the dataset but the map scale image has 7.5, 8.0, 8.5...

Maybe both of these issues can be solved with the same fix.  If anyone has guidance on this, I would greatly appreciate hearing from you!  Thanks in advance!

Regards,

Daniel Oostra
Science Systems and Applications, Inc.
NASA/LaRC Atmospheric Sciences Data Center
2 South Wright Street
Hampton, VA 23681-2199
Ph: 757.864.6157
daniel.h.oostra@xxxxxxxx

References:
- [las_users] gov.noaa.pmel.tmap.las.exception.LASException: No operation /lasdata/operations/operation[@ID='GODAETrack'] found.
  - From: Serra, Mr. Efren, Contractor, Code 7542
- [las_users] Map Scale and Palettes.
  - From: Oostra, Daniel H. (LARC-E302)[SCIENCE SYSTEMS AND APPLICATIONS, INC]

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