[GRASS-dev] r.los diff between grass 6.2 and 6.3

GRASS GIS GRASS GIS developer
1

Hi,

is it possible, that r.los returns different outputs in GRASS 6.2(.3)
and 6.3 ? Which one is the "right" one?

Sample data:
http://www.bnhelp.cz//cgi-bin/mapserv?map=/var/www/projects/sazp/mapserv/sazp.map&service=WCS&request=getCoverage&crs=epsg:102067&coverage=dem&resx=80&resy=80&width=500&height=500&format=image/tiff16&bbox=-360301.0595739889,-1208912.828415709,-320301.0595739889,-1168912.828415709

r.los in=dem out=vis2 coordi=-340301.0595739889,-1188912.828415709
obs=1.5

produced outputs:
GRASS 6.2 http://les-ejk.cz/tmp/vis1.png
GRASS 6.3 http://les-ejk.cz/tmp/vis1.png

jachym

--
Jachym Cepicky
e-mail: jachym@bnhelp.cz
URL: http://www.bnhelp.cz http://les-ejk.cz
GPG: http://www.les-ejk.cz/pgp/jachym_cepicky-gpg.pub
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2

Jachym Cepicky wrote:

is it possible, that r.los returns different outputs in GRASS 6.2(.3)
and 6.3 ? Which one is the "right" one?

Sample data:

http://www.bnhelp.cz//cgi-bin/mapserv?map=/var/www/projects/sazp/mapserv/sazp.map&service=WCS&request=getCoverage&crs=epsg:102067&coverage=dem&resx=80&resy=80&width=500&height=500&format=image/tiff16&bbox=-360301.0595739889,-1208912.828415709,-320301.0595739889,-1168912.828415709

r.los in=dem out=vis2 coordi=-340301.0595739889,-1188912.828415709
obs=1.5

produced outputs:
GRASS 6.2 http://les-ejk.cz/tmp/vis1.png
GRASS 6.3 http://les-ejk.cz/tmp/vis1.png

                                ( vis2.png )

Hi,

the default value for the max_dist option was changed from 1000 to
10000. r.los is still very very slow, but today's computers are faster
so we can increase that value now.

So your 6.2 version only looks as far as 1km while 6.3 looks 10km.

Hamish

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