hi,
what I've tested here on my win7-64bit-box with osgeo4w-wingrass6.4.3.svn:
as stated in the manual
http://trac.osgeo.org/grass/browser/grass-addons/grass6/raster/r.denoise/description.html
(1)
wget http://www.cs.cf.ac.uk/meshfiltering/index_files/Doc/mdsource.zip
unzip mdsource.zip
cd mdenoise
(2) built mdenoise within the osgeo4w-stack
g++ -o mdenoise mdenoise.cpp triangle.c
(3) and put the exe in the %PATH%
(e.g. C:\Users\xxxxxxx\AppData\Roaming\GRASS6\addons)
(4) projected location (epsg3035) with the Aster DEM v2 (~30m x ~30m)
(5)
g.region -p
projection: 99 (Lambert Azimuthal Equal Area)
zone: 0
datum: etrs89
ellipsoid: grs80
north: 2686202.52683254
south: 2627115.59422961
west: 4471032.62800725
east: 4541841.53570558
nsres: 22.717006
ewres: 22.717006
rows: 2601
cols: 3117
cells: 8107317
r.denoise --verbose input=aster24myrisel@PERMANENT output=aster24myriseldenoise
Exporting points...
Denoising...
Input File: C:\grassdata/alpslaeaepsg3035/testrmdenoise/.tmp/10536.0.xyz
Neighbourhood: Common Vertex
Threshold: 0.930000
n1: 5
n2: 50
Read Model...
Triangulation...
93.789 seconds
Denoising Model...
Error malloc: Out of memory.
(6)
g.region -p -a rast=aster24myrisel@PERMANENT vect=smallisel@testrmdenoise align=aster24myrisel@PERMANENT
projection: 99 (Lambert Azimuthal Equal Area)
zone: 0
datum: etrs89
ellipsoid: grs80
north: 2657420.08023204
south: 2642086.10118283
west: 4497043.5998759
east: 4515580.67677094
nsres: 22.717006
ewres: 22.717006
rows: 675
cols: 816
cells: 550800
r.denoise --verbose input=aster24myrisel@PERMANENT output=aster24myriseldenoise
Exporting points...
Denoising...
Input File: C:\grassdata/alpslaeaepsg3035/testrmdenoise/.tmp/10656.0.xyz
Neighbourhood: Common Vertex
Threshold: 0.930000
n1: 5
n2: 50
Read Model...
Triangulation...
5.148 seconds
Denoising Model... 11.232 seconds
Saving Model... 1.295 seconds
Reloading data...
command finished
=> IIUC mdenoise is very memory consuming, so adjust the region to a reasonable "small" extent.
as mentionded in the manual, the location should be projected.
geographic (lat-long) location requires projection during processing which I've never got to run.
HTH
best regards
Helmut
Gesendet: Donnerstag, 24. Januar 2013 um 20:45 Uhr
Von: "Nikos Alexandris"
An: "Helmut Kudrnovsky"
Cc: "Luís Mário Ribeiro"
Betreff: Re: [GRASS-user] denoising error (r.denoise)
Helmut,
with all the respect -- apologies for the PM. Could you please have a look,
if and whenever you have some time, on the issue that Luis reported in the
list?
(I don't have currently access on a win-box.)
Danke, Nikos
On Wednesday 23 of January 2013 11:27:20 Luís Mário Ribeiro wrote:
Hello all,
When trying to denoise a DEM mdnoise.exe �stops working� and I get this:
__
(Wed Jan 23 11:16:54 2013)
r.denoise.bat input=teste@GDEM_V2_UTM output=teste_dn
Exporting points...
Denoising...
This application has requested the Runtime to terminate it in an unusual
way.
Please contact the application's support team for more information.
__
My system is a Win7 64bits and I�m using Grass 6.4.2
Anyone ever experienced this? I�m a new user to Grass so I�m sorry if this
is a dumb question�
Would really appreciate some help.
Thanks
luis
