Re: [Opengc-devel] maps on nav display

[Damion S. <da...@op...>]

Hi,

> Has anyone considered making a moving map display with these
> images?  How difficult would it be to put these images onto the
> nav display?

I was unaware that this sort of data even existed. In looking for the 
headers provided for each sectional it appears that there is sufficient 
information to reconstruct the coordinate projection used on each map 
(specifically, Lambert Conformal Conic). See 
http://mathworld.wolfram.com/LambertConformalConicProjection.html

Given the parameters of the projection, it should be relatively easy to 
implement that projection for OpenGC's internal nav data so that route 
information would be correctly overlaid on the graphical sectional.

As far as the actual placement of the images on the nav display goes, 
OpenGL's texturing capability could do this pretty easily. The tricky 
bit would be aligning the sectional projection with the internal 
projection.

> I found an unsupported program
>   http://www.hsge.de/geo-spatial/software/index.html
> that will read & display the images, so that may be a starting
> point.

I'll take a look at it. Thanks for the info.

-Damion-