Fw: Re: Adding Terrain data/viewing

[Wookey]

+++ Wookey [2013-09-17 19:51 +0100]:
> Matt Kirby <mattkirby99 at hotmail.com> wrote:
> > Attached is a screenshot of how 'our' version looks. Phil put an extra pen
> > on the toolbar for terrain and the command we use is *terrain. Tim put
> > together a 250m grid over Mulu and placed this over a 1:50,000 map to gain
> > the level for each point from the contour data. It works a treat. The
> > benefit of the terrain being in blue is that it doesn't interfere with the
> > surface surveys and the caves can still be clearly seen through it. Our
> > problem with using *surface was that it was very difficult to see through
> > and you 'lost' the normal surface traverses in the sea of black and white.
> 
> [ You can see matts 4Mb .bmp file converted to a 135K png here:
> http://wookware.org/files/muluterrain.png
> ]
> 
> OK, so that's just reading in survex data in the local co-ordinate
> system, which is what terraintool puts out. You can tell it
> (terraintool) to do a 250m grid too (which I think is helpful on big
> datasets - our austria data suffers from too many surface lines with a
> 50m spacing). Although getting the nice outline shape would still need
> manual work.
> 
> So the patch is to allocate data inside a *terrain block to a new
> button and line colour. I agree that separating terrain from surface
> is handy, as is the colour change. This is actually very easy to do.
> 
> Now, if someone can just find phil's patch to save us doing it again.

Here it is: http://wookware.org/software/survex/terrain.patch

Wookey
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