6 replies to this topic

[josie]

Hello all,

I am trying to export some data to google earth. However, the centre of latitude and longitude in the data are wrong. Is there an easy way to find out what they need to be if I have the coordinates and the ones that they should come in at in google earth?

Hope this makes sense.

Thanks

Josie

[Crischan]

Well, if you are unsure about the coordinate reference system of your input data all of this becomes a gamble. your destination coordinate reference system is plain old WGS84 decimal degrees (http://en.wikipedia...._systems_in_KML)
asprs.org has a nice list of coordinate reference systems fo many countries which has helped me more than once when i received data without a CRS definition...

[josie]

Well the values for the semi major and semi minor axis were changed in the original data. This effects the data when I try and move it to google earth but I really am not sure how to correct for this.

[Crischan]

do you now the vlaues for the major and minor axes? then you will need to reproject from "your" custom CRS to WGS84.

[josie]

Yes I have the values for the semi major and semi minor axis. I am not sure how I can reproject back to the normal WGS 84 semi major and semi minor. Is there a simple way to do this?

[josie]

I am thinking maybe I need to make a custom datum and then transform it? Or is there an easier way? I should probably mention that I am using Manifold.

[Crischan]

yes, i think that would be the way to go. i have never used manifold, so i don't know how hard that would be.