[GRASS-dev] Re: Line of Sight Update

Paul Kelly paul-grass at stjohnspoint.co.uk
Wed Jul 23 06:35:42 EDT 2008


On Wed, 23 Jul 2008, Markus Neteler wrote:

> On Wed, Jul 9, 2008 at 8:11 PM, Will <willster3021 at gmail.com> wrote:
[...]
>> It is done exactly the way you mentioned in the other email, finding the
>> radius of the elipsoid and reducing the elevatin of the cell that you are
>> looking at depending on the distance it is away from the viewpoint.  The way
>> r.los does it is they have a flag that you set if you want the curvature to
>> be considered, though I can impliment it for all calculations without a flag
>> if we think that will be better- any input from the list on this?
>
> I would keep the flag if there aren't too many.

Yes, agreed it should be optional - someone might want to use the module 
in an XY environment without large-scale real-world considerations such as 
earth curvature.

Paul


More information about the grass-dev mailing list