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FSX Photoreal Resample Resolution

rhumbaflappy

rhumbaflappy

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Hi all.

I've found that resample for FSX does such a good job, that it will resample at far greater resolutions than FSX can display.

The highest resolution for FSX is 7cm/pixel ( about 2.75 inches ). This is LOD19 ( actually 6.67943E-07 degrees/pixel ). AUTO does a good job choosing the LODs.

Here's an example:
Code: 
[Source]
Type                = GeoTIFF
SourceDir           = "source"
SourceFile          = "Hello.tif"
Layer               = Imagery
Variation           = Day
NullValue           = 255,255,255

[Destination]
DestDir             = "scenery"
DestBaseFileName    = "Hello"
DestFileType        = BGL
LOD                 = Auto

The source is a very small TIF made by MSPaint, and geotagged by GeoTifExamine. A note, if you expect a sharp 1 pixel line, it won't happen... FSX, as do FS9 and FS2002, smooths images. But you will see a line!

HelloExample.JPG


Dick
 
Tasmanet

Tasmanet

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Dick

What is the largest size .tif (pixels) that we will be able to use in FSX and what area would this cover using LOD = Auto

Steve
 
rhumbaflappy

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Hi Steve.

I guess the largest pixel dimensioned tif image would be controlled by the size of your computer's memory... but I'm not sure of that.

The geographic bounds are controlled by the X and Y scale tif tags. I believe resample cannot compile over the international date line ( where -180 meets 180 ).

Dick
 
H

Horst

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6
I would not use bigger then MS used.
Because, the terrain engine has to handle this data, on different systems, in a game.

Kind regards
Hort
 
rhumbaflappy

rhumbaflappy

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Hi all.

I am using a 360x360 pixel image tagged to cover the whole earth. Resample happily is working on it! LOD 13 is 402653184 cells! Looks like I've got an hour to wait for the end result.

Edited:

It now looks like I have over 12000 hours to wait. I guess I'll stop it. ;)

Dick
 
Last edited:
rhumbaflappy

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GreyWorld.JPG


This was from a geoTif 359x179 pixels, tagged as 1.0 degree span.

Code: 
[Source]
Type                = GeoTIFF
SourceDir           = "source"
SourceFile          = "GreyWorld.tif"
Layer               = Imagery
Variation           = Day
NullValue           = 255,255,255

[Destination]
DestDir             = "scenery"
DestBaseFileName    = "GreyWorld"
DestFileType        = BGL
LOD                 = 0,5
CompressionQuality =10

Everything seen as LOD0 to LOD5 is grey, and anything "closer" is the sim's default colors.... in the center of the above pic, you can see the default ground tiles.

So can a resampled geotif cover the whole earth? Yes.

LOD13 is the 5m/pixel resolution. LOD15 is the new 1m default texture resolution.

Dick
 
Tasmanet

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But the final result in FSX is a DXT3 with the Co ordinates all compiled into a .bgl. :confused:

An Airport like KLAX could be covered by one Image at say 1ft per pixel :confused:
 
Last edited:
rhumbaflappy

rhumbaflappy

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Tasmanet said:
But the final result in FSX is a DXT3 with the Co ordinates all compiled into a .bgl. :confused::
Click to expand...

The image is in the BGL... I don't know if the format is DXT at all.


Tasmanet said:
An Airport like KLAX could be covered by one Image at say 1ft per pixel :confused:
Click to expand...

Yes. I covered the small town of Delavan Wisconsin at 1 meter/pixel, and it looked very good. If you have the data, and the correct projection, you can cover any ground you like.... vectors do not show over the photoreal, but runways and taxiways and aprons do show. Ground traffic travels over the photoreal.



Dick
 
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