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Multisource inf file question

D

docg

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20
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us-arkansas
Hi,

I'm just a plain newbie at PhotoReal scenery and know just enough to be dangerous. :) I've had pretty good luck so far with my project but now have a problem with the bgl size nearing 2 gigs.

I ran across another thread where Arno mentions the 2 gig size limit for bgls and says that you have to tell FS to create different bgl files to each tile.

I'm not sure if I understand this. I've pasted a copy of my test multisource.inf file below. I know something is not right in the [DESTINATION] section. This inf file did create a single bgl.

What I'm wondering is what do I need to change in the inf file to have the resample process create a different bgl for each of the sources or can it be done.

Looked in the sdk and the only thing I saw that looked remotely like something that would do this was the SplitFileLOD command. Wasn't sure if this is what I needed but did make a guess at how it should be entered. I guessed SplitFileLOD = 3 because there were three sources and hoped that resample would magically create the files numbered 1, 2, and 3 using the file name I used for the DestBaseFileName. I guessed wrong. :)

Any help will be greatly appreciated.

Thanks

Doc G


[Source]
Type = MultiSource
NumberOfSources = 3


[Source1]
Type = GeoTiff
SourceDir = "SourceData"
SourceFile = "Alexander_All_wgs84.tif"
Layer = Imagery
Variation = Day
NullValue = 255,255,206

NoData = ,,,,0

ULXMAP = -92.50368934739519500
ULYMAP = 34.75296977820323000
XDIM = 0.00000551381491640
YDIM = 0.00000551381491640

[Source2]
Type = GeoTiff
SourceDir = "SourceData"
SourceFile = "Pinnacle Mountain_All_wgs84.tif"
Layer = Imagery
Variation = Day
NullValue = 255,255,206

NoData = ,,,,0

ULXMAP = -92.50367711508299400
ULYMAP = 34.87795182288735400
XDIM = 0.00000551386287914
YDIM = 0.00000551386287914

[Source3]
Type = GeoTiff
SourceDir = "SourceData"
SourceFile = "Little Rock_All_wgs84.tif"
Layer = Imagery
Variation = Day
NullValue = 255,255,206

NoData = ,,,,0

ULXMAP = -92.37859306423300200
ULYMAP = 34.75289231121870200
XDIM = 0.00000550796887168
YDIM = 0.00000550796887168

[Destination]
DestDir = "Output"
DestBaseFileName = "Alex_PIN_MT_LR_ALL"
DestFileType = BGL
LOD = Auto
SplitFileLOD = 3
 
Hi Doc G.

You might try this:

Code: 
[Destination]
DestDir = "Output"
DestBaseFileName = "Alex_PIN_MT_LR_ALL"
DestFileType = BGL
LOD = Auto
CompressionQuality = 85

85% CompressionQuality will reduce the size of the BGL significantly, whild maintaining most of the quality of the display.

Dick
 
Hi Doc,

The value behind the SplitFileLOD option specified the LOD tile size that it is split to. So in my case each LOD11 tiles becomes a BGL file. In your case you are asking for LOD3 tiles, which is very big. So that is way you only see one. I found out that for the resolution I used (about 20 cm resolution) LOD11 was needed to keep the individual tiles below 2 GB.
 
Thanks guys. I appreciate you taking the time to lend a helping hand to a beginner. These two bits of info have my project back on track.

Doc G
 
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