[GRASS-user] Problems with v.outlier and v.lidar.edgedetection

[Roberto Antolin]

Hi Michael and all,
I'm the v.outlier and v.lidar.* developer. First of all, I'm very sorry 
for these bugs.

I knew the v.outlier bug from long time ago but I didn't fix it and I 
forgot it. I've just fixed and now I will send it to the CVS. So, you 
will able to download the new version from there. A dirty solution is:
~ > v.outlier input=pslc2k_sub2 output=clean outlier=outlier qgis=clean_qgis

This should run ok.

So, if you don't need the qgis output you can remove it. The qgis output 
vector parameter was done to allow the visualization of the point's 
color as a function of its height within qgis. But this approach needs 
that the topology is built and the height is considered as a category. 
However, the standard output ("outlier=" and "outlier=") are done 
without topology and with the height as the z-coord in a 3d-vector.

The v.lidar.edgedetection bug is a new one. I'll try to fix it as soon 
as possible. Another thing, I advice you about this module. It doesn't 
run with dbf driver and db because the sql setences used are not allow 
for them. But this is not the error in this case.

I'm sorry very much,
Roberto.


Michael Perdue ha scritto:

> Good Morning,
>
> I've been playing with some tools for working with lidar data sets and 
> I've encountered two problems. First, when I try to run v.outlier the 
> module immediately exits with "Bus error" warning.
>
> GRASS 6.2.0 (Mudflats):~ > v.outlier input=pslc2k_sub2 output=clean 
> outlier=outlier
> Bus error
>
> Second, in my attempts to classify the point clouds 
> v.lidar.edgedetection runs for a while and then exits with the 
> following error;
>
> GRASS 6.2.0 (Mudflats):~ > v.lidar.edgedetection input=Gldcrk_sub2 
> output=edge
> DBMI-DBF driver error:
> Table 'Auxiliar_edge_table' doesn't exist.
> Error in db_execute_immediate()
>
> ERROR: Impossible to write in the database
>
> I'm running GRASS on an intel mac (OSX 10.4.8). Does anyone have any 
> insight into either of these issues?
>
> Cheers,
>
> Mike
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-- 
Roberto Antolín Sánchez
Politecnico di Milano – Polo Regionale di Como
(Laboratorio di Geomatica V2.8)
Via Valleggio, 11 – 22100 Como, Italy
tel: +39 031 332 7533 || fax: +39 031 332 7519 
email: roberto.antolin at polimi.it