Re: Airports keep being placed at sea level

Chris Metzler wrote:

>On Sun, 07 May 2006 00:12:09 +0200
>Frederic Bouvier wrote:
>  
>
>>Selon Frederic Bouvier:
>>    
>>
>>>Currently recognized directory names are :
>>>
>>>    // Please update the help near the top of this file if you update
>>>this list.
>>>    elev_src.push_back( "SRTM2-Africa-3" );
>>>    elev_src.push_back( "SRTM2-Australia-3" );
>>>    elev_src.push_back( "SRTM2-Eurasia-3" );
>>>    elev_src.push_back( "SRTM2-Islands-3" );
>>>    elev_src.push_back( "SRTM2-North_America-3" );
>>>    elev_src.push_back( "SRTM2-South_America-3" );
>>>    elev_src.push_back( "DEM-USGS-3" );
>>>    elev_src.push_back( "SRTM-30" );
>>>      
>>>
>>This is also explained when you do
>>
>>$ genapts --help
>>    
>>
>
>That was it.  Thanks Fred.
>
>This never occurred to me as a possibility, because the TerraGear
>documentation specify SRTM-United_States-1 (and similarly for other
>areas) for the SRTM 1" data.  So apparently the list above predates
>the 1" dataset, and the docs are ahead of the genapts code -- even
>though the docs haven't been revised in well over a year.  And the
>last scenery was built using SRTM 1" data, so this must have been
>an issue then too, right?  I just made a symbolic link of
>SRTM2-North_America-3 to SRTM-United_States-1, and it worked OK.
>Presumably that's what Curt did as well?
>
>Should the list be updated?  I'd be happy to make the effort to
>figure out what the list should be and make some kind of patch,
>if it'd be useful.  Or does it make more sense for genapts to
>instead take a command line argument indicating where the elevation
>data is located?
>  
>

I had my own set of notes I was developing (probably located in the root 
terragear source dir?)  I would need to go searching to refresh my 
memory.  That might help with some of the specifics.  The existing 
tutorials give a good broad overview of the process, but are beginning 
to get dated in terms of the specific details.

Curt.

-- 
Curtis Olson        http://www.flightgear.org/~curt
HumanFIRST Program  http://www.humanfirst.umn.edu/
FlightGear Project  http://www.flightgear.org
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