David Megginson wriyes:
> 
> Erik Hofman writes:
> 
>  > I already had the impression something wasn't completely right with the 
>  > vmap0 data, but this beats everything.
> 
> The elevation doesn't come from the vmap0 data.  What happens is that
> we have to build with --min-triangle=0 because TerraGear cannot handle
> the complexity of the extra information in vmap0, and occasionally,
> that causes TerraGear to break down a bit and produce something like
> this.  If we start adding roads, rivers, etc. from any other source,
> we get the same problem.

I don't think this particular case has anything todo with the 'min triangle'
issue.  Instead it is simply that the coastline is not sufficiently accurate
for the area involved.  This is a common problem with smallish islands
and the DCW data.  note that the GSHHS data was intended to be used 
for 'crude' navigation and often has a much better resolution then its nominal 
scale in situations like this.

ie look at the vmap0 representation for many islands and you will find
that they are just 3 or 4 points wheas the same in GSHHS will show
things ike atols and barrier reefs for the same place

Cheers

Norman

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