[Opensim-users] Heightmap Grayscale % = ??? Meters?

[Len W. Brown]

Ah yes, thanks for the trip down memory lane! I remember seeing that
over a year back while still pretty active in Second Life. 

Although it
hasn't been updated since August of last year, it has helped answer a
few of my other questions, however, on the page I am reminded that I
continue to be doing something wrong, or else Second Life's servers are
better calibrated, because I am reading: 

Remember that the water level
has a default elevation of 20 meters (with a corresponding gray value of
20), and that an estate owner can change this setting in-world. 

And
while this is my objective, the actual height I'm getting in-world is
not accurate. Unless maybe by using PNG rather than importing a
RAW-generated terrain that is where my trouble stems maybe? 

Thanks
again! 

On 05/06/2012 08:23, R.Gunther wrote: 

> Not sure if you found
this one. But here you can find lots of info about Secondlife
heightmaps.
>
http://wiki.secondlife.com/wiki/Tips_for_Creating_Heightfields_and_Details_on_Terrain_RAW_Files
[1]
> 
> On 2012-05-06 15:04, Len W. Brown wrote: 
> 
>> Hi everyone!
Google and OpenSimulator.org haven't provided me a really clear direct
answer to this question (yet)... 
>> 
>> I am attempting to create a
very crisp heightmap for a tech-based region I'm planning where certain
areas must be at precise elevations. I'm trying to choose precise
grayscale colors that result in precise elevations. 
>> 
>> I'm having a
hard time determining what settings to choose. 
>> 
>> I'm using GiMP
and have made multiple attempts this morning creating an image 256X256,
grayscale, set to total black and saved as a PNG with zero compression.
But when loading in the console ("terrain load 0.png" for example) while
it loads "successfully" what I wind up with is a flat terrain that is
approximately 12.25 meters in elevation. Not the 0 meters I expected.

>> 
>> Doing the same as above, but setting the grayscale to 20 on a
new image, I expected it to load at sealevel. Instead it loaded at about
25.75 meters elevation. 
>> 
>> I would sincerely appreciate a clear
options setting for elevation if this is actually supported with
precision in OpenSim 0.7.3.1... Thanks! 
>> 
>> -- 
>> 
>> - Len W.
Brown
>> len at lenwbrown.com
>> 
>>
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list
>> Opensim-users at lists.berlios.de
>>
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-- 

- Len W.
Brown
 len at lenwbrown.com
 www.lenwbrown.com
 

Links:
------
[1]
http://wiki.secondlife.com/wiki/Tips_for_Creating_Heightfields_and_Details_on_Terrain_RAW_Files
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