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fsterraincalc-not aligned

Rick Celik

Rick Celik

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257
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australia
Hi i use fs-terrain calc to place my photo realistic images and realised that even thogh my co-ordinates are correct my image appears a little above,left,below,right to my airport??
 
Hi,

That can have a lot of reasons I would say:

  1. Maybe the airport is not placed very accurately?
  2. The images you are placing might not be in the WGS84 projection that FS assumes
  3. How accurate do you know the position of your image? Do you only know a few points or more?
 
My airport is a default and i have google earth co-ords in degrees and the WGS84 projection i have no idea what that is:laughing:
 
Hi,

Where did you get your image from? I think the most likely reason would be that it is not in the correct projection.

Btw, just to refresh my memory. After using FsTerrainCalc you use resample to create the BGL right?
 
yep resamples the one . Thats what creates my bgl can you tell me about this projection thing ?
 
It is a bit hard to explain, but when you have a map or an aerial image it can have a lot of different projections. Almost each country has their own projection optimized for their area. Have a look at this Wikipedia article that explains it a bit more:

http://en.wikipedia.org/wiki/Map_projection

Resample only works correctly with WGS84 projection (as stated in the SDK). If your image is in a different projection that could result in slight rotations or translations of the image. So therefore my question where the image came from.
 
No, I don't mean what is on the image. Where did you get it from? Is it a satelite image? Did the provider maybe give you some additional information about the image?
 
yes its a sattelite image from google earth i know i cant use google earth images and then put my scenery on other websites but its for another project for my self.
 
I don't know which projection Google Earth is using, but I don't think it is purely WGS84. So I guess that is the mean problem you are having.
 
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