[GRASS-user] long run time with r.sunmask

[Markus Neteler]

Dylan Beaudette wrote on 03/08/2007 11:25 PM:
> On Thursday 08 March 2007 14:17, Hamish wrote:
>   
>> any idea if this is because of the (better) SOLPOS algorithm r.sunmask
>> uses, or is it just inefficient structure in the r.sunmask module?
>>
>> ie if/when r.sun is updated to use SOLPOS, can we expect a big slowdown in r.sun run times?
>>
>>
>>     
>
> ... as I make heavy use of r.sun and any issues related to either 
>
> 1. poor performance in SOLPOS
>   
I don't think that SOLPOS is the problem. As far as I remember,
r.sunmask was
slow even before I added SOLPOS there.

> 2. current inaccuracies in r.sun are of interest to me. Could it be due to the on-the-fly computation of slope/aspect within SOLPOS?
?? SOLPOS is not implemented in r.sun.

What to you exactly mean? I 'bcc' to Thomas Huld/JRC to point out this
issue. Maybe he
has comments for us which I can fwd here.

Markus