[vtk-developers] Geocoordinate System Filter, 2D Text Manager, 2D Text Preformance, and Buffered Hardware Picking

[Thompson, David C]

> and also check out vtkGeography where much has already been done.
> http://www.cs.uno.edu/~maik/vtkGeography/index.html
Wow, all my searching never turned that up. Thanks.

> PS. I also have some old (but accurate) code which implements the UK
> National grid ...
I was (naively?) hoping to hide all the different coordinate systems in
a utility library like PROJ.4 instead of implementing each one (there are
*tons* of them) as its own distinct subclass of vtkCoordinateSystem the
way vtkGeography appears to. My (to date cursory) review of PROJ.4
made me think that many of these datums can be compiled into the library
but perhaps it doesn't choose the most numerically stable way to transform
coordinates from one system to another?

     David