[GRASS-user] Feature extraction in GRASS and Landserf.

[Markus Neteler]

On Mon, Aug 16, 2010 at 10:20 PM, Marcello Gorini <gorini at gmail.com> wrote:
>
> Dear all,
>
> By comparing morphometric feature maps obtained from both "r.param.scale" in
> GRASS and the function "sufparam" using LandScript in Landserf (Wood,
> 1996-2009), I noticed great discrepancies.
>
> Actually, a morphometric feature map derived in GRASS using slope tolerance
> of 3 and curvature tolerance of 0.000003 is similar (visually) to a map
> derived in Landserf using 3 for slope and 0.05 for curvature.

Please generate a difference map (color table "differences") and put a
screenshot online somewhere. Perhaps also drawn over the shaded
DEM (r.shaded.relief) with d.his (h=differences i=shaded_terrain).

Markus

> After consulting r.param.scale manual and Wood's documentation I am still
> clueless.
>
> Can anyone help me in this issue?
>
> I am using GRASS 6.4.0SVN and Landserf Version 2.3.
>
> I thank you all very much in advance.
>
> Best regards,
>
> Marcello Gorini.
> --
> View this message in context: http://osgeo-org.1803224.n2.nabble.com/Feature-extraction-in-GRASS-and-Landserf-tp5429470p5429470.html
> Sent from the Grass - Users mailing list archive at Nabble.com.
> _______________________________________________
> grass-user mailing list
> grass-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user
>