Celestia Forums

Has anyone placed objects using the latitude and longitude shown by GoogleEarth and compared their positions to what is shown by high-resolution VTs?

I'm seeing a discrepancy: using values shown by GoogleEarth, LongLat is placing the VAB and LaunchPad 39A significantly to the NorthEast of their locations on VT images of Cape Canaveral.

I don't know if it's a problem with GoogleEarth, with LongLat or with the placement of the VT that I'm using. (Perhaps a fence-post error?)

To verify that it wasn't only the Cape Canaveral Addon, I also did a comparison with the location of Andrea's VT of Venezia (Venice, Italy). Something's wrong there, too.

Here's a picture of the offset for the VAB. It should be placed just below the dark blotch (the building's shadow) in the center. Instead it's offset toward the north-east.


Here's a picture of the offset for Venezia. The location marker should be near the grey industrial area. Instead its down south in the residential section:

GE images are not always properly georeferenced (sometimes the imagery is shifted by many, many metres).
You should also try using coordinates given by World Wind or Virtual Earth - so you'll know if it's GE or Celestia VT fault.