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BGL names...

WarpD

WarpD

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Is there anywhere that explains how the sim(s) choose the names given for scenery files, and what they contain? I did some searching and didn't find anything, which means I used the wrong term(s) or I'm not looking in the right locations or both... or... well... is there anything?
 
I have seen some Text writen in the FS about the BGL´s. The names of it and what it is, but I do not remember where it was.
FS2004 SDK or FSX SDK i dont know. I try to remember.
 
WarpD said:
Is there anywhere that explains how the sim(s) choose the names given for scenery files, and what they contain? I did some searching and didn't find anything, which means I used the wrong term(s) or I'm not looking in the right locations or both... or... well... is there anything?
Click to expand...
Hello...

The question that your asking, if I understand correctly, does the Sim(s) choose the filenames of sceneries... the short answer is: The Sim(s) does not pick the filenames, the entity or individual that creates the sceneries does...

What's the reason for your question?



Sent from my SM-J700T using Tapatalk
 
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The QMID grid does not appear to apply to file names much, but rather mostly folder names. As example for KJYO the airport is in APX27180.bgl. So what does the 27180 correlate to? While the navaid file for 0302 is titled NVX03020.bgl (correlating to a QMID value). Does the extra zero represent something? Why is there an extra zero instead of the file being NVX0302.bgl? While I understand APX files are airports, what are BRX files? CVX? OBX?

Like I asked... is there anywhere that explains all of this?
 
The BRX files contain extrusion bridges, CVX files contain vector data and OBX files contain scenery objects for that area.

Drop one of thr CVX files onto TmfViewer to see its content.
 
And the numbering convention for airport files? It does not match the QMID in the SDK.
 
WarpD said:
And the numbering convention for airport files? It does not match the QMID in the SDK.
Click to expand...
I think the APX naming is based on the 8x8 grid inside the large QMID4 a QMID7 grid.

Look at Antarctica. 1107.

The base folder is 1107 - XXYY

Inside that folder is APX92590.bgl APXnnmm0.bgl.

nn = 92 then divide by 8 and take the int. its 11
mm = 59 then divide by 8 and take the int. its 7 or 07.

I think the zero is a red herring. OR its for a further sub dividing. Perhaps for a future FSX/ESP/P3D functionality.

I think these file names are for human requirements not for the program. If you have FSGenesis dem stuff you will see FSGdem files. Also in the spirit of the olympics. Look in 0405 and file brazil_rio_dem.bgl
 
Actually... taking what Ron posted and tossing into the blender (my brain) brings me to a realization.

9250 isn't just 1107... it means so much more.

Take the block represented by 1107 and divide it into another 8x8 block.

92 / 8 is 11.5... so it's QMID is 11 but inside that is a further reference of 4.
59 / 8 is 7.375... so it's QMID is 07 but inside that is a further reference of 3.

If you look at the numbers... absolutely every single one of them is a value that results in fractions of 8.

So... thanks Ron...

Now reading this: http://www.fsdeveloper.com/wiki/ind...g_QMID_u_and_v_based_on_level_and_coordinates makes sense. Level 6 gives further subdivision by 8 for the u and v values.

I just ran the lat/lon for KJYO through that code and got 27 for the longitude and 18 for the latitude at level value of 5. (it's a zero based value so 5 is the sixth value).
 
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Hi All,

what I found out so far (what the stock scenery uses as a file prefix):

# APX Airports
# ATX Routing information
# BRX Bridges
# CVX Various coastlines waterpolys roads
# NVX Navaids - VORs, NDBs, & associated scenery objects.
# OBX Objects
# DEM Digital elevation map
# bvcf.bgl CENTER type airspace boundaries.
# BNXWorld* Geopolitical and airspace boundaries.

Alex
 
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