[Therion] Cave Overlays on Google Maps Web Sites

[Julian Todd]

Martin Sluka wrote:
> On 27.1.2007, at 22:09, Bill Chadwick wrote:
>
>   
>> It is quite easy to create a web page that shows a cave survey  
>> overlay on
>> top of Google / Virtual Earth maps.
>>     
>
> Good work!
>
> There is only one problem - google doesn't calculate with underground  
> in 3D - so you may not see the vertical dependencies, the caves are  
> always on surface.
>
> Martin
>   
It looks like simultaneous invention all round.  I'm doing something on 
this too.  I think it should work for any paper survey that you can scan 
and upload, not just computerized ones output from therion or tunnel.  I 
have a server which can do tile cutting of a large bitmap of a cave 
survey.  It's going to be important to create a mask of transparencies 
so you can see it overlayed without all the whitespace outside of the 
cave passage. 

Julian T.