[GRASS-user] v.dissolve bugfeature / workaround needed

[Moskovitz, Bob]

Hello Moritz and Peter,

I have the v.dissolve problem too.  I'm running GRASS 6.4.svn (is there a way to tell what svn revision I'm using?) on Hardy Heron X86_64.  Hope this info tells you something:

 > v.dissolve input=alquist_priolo_eq_zones_mrg_ll83 at PERMANENT output=efz layer=1 column=FaultName
Segmentation fault
dbmi: Protocol error
ERROR: Cannot open select cursor: SELECT cat, FaultName FROM
       alquist_priolo_eq_zones_mrg_ll83 ORDER BY FaultName
ERROR: Unable to open vector map <efz_24149 at PERMANENT> on topology level 2
WARNING: Table <efz_24149> linked to vector map <efz_24149> does not exist
ERROR: Vector map <efz> not found in the current mapset

 > v.info alquist_priolo_eq_zones_mrg_ll83
 +----------------------------------------------------------------------------+
 | Layer:           alquist_priolo_eq_zones_mrg_ll83                          |
 | Mapset:          PERMANENT                                                 |
 | Location:        CGS_SW_FaultLines                                         |
 | Database:        /home/bobm/Data/Grass                                     |
 | Title:                                                                     |
 | Map scale:       1:1                                                       |
 | Map format:      native                                                    |
 | Name of creator: bobm                                                      |
 | Organization:                                                              |
 | Source date:     Fri Nov 17 11:47:54 2006                                  |
 |----------------------------------------------------------------------------|
 |   Type of Map:  vector (level: 2)                                          |
 |                                                                            |
 |   Number of points:       0               Number of areas:      2242       |
 |   Number of lines:        0               Number of islands:    788        |
 |   Number of boundaries:   4630            Number of faces:      0          |
 |   Number of centroids:    2224            Number of kernels:    0          |
 |                                                                            |
 |   Map is 3D:              0                                                |
 |   Number of dblinks:      1                                                |
 |                                                                            |
 |         Projection: Lambert Conformal Conic                                |
 |               N:  4959352.74991602    S:  3929916.63677083                 |
 |               E:   341967.39773093    W:  -438465.59887675                 |
 |                                                                            |
 |   Digitization threshold: 0                                                |
 |   Comments:                                                                |
 |                                                                            |
 +----------------------------------------------------------------------------+

 > v.info -c alquist_priolo_eq_zones_mrg_ll83
Displaying column types/names for database connection of layer 1:
INTEGER|cat
DOUBLE PRECISION|ID
CHARACTER|COUNTY
CHARACTER|QUADNAME
CHARACTER|FaultName
CHARACTER|HistoricSR

Bob Moskovitz
Research Analyst I
Seismic Hazard Evaluation Project
California Geological Survey
http://gmw.consrv.ca.gov/shmp

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> -----Original Message-----
> From: grass-user-bounces at lists.osgeo.org
> [mailto:grass-user-bounces at lists.osgeo.org]On Behalf Of Moritz Lennert
> Sent: Thursday, August 07, 2008 8:45 AM
> To: Peter Löwe
> Cc: grass-user at lists.osgeo.org
> Subject: Re: [GRASS-user] v.dissolve bugfeature / workaround needed
> 
> 
> On 07/08/08 17:20, Peter Löwe wrote:
> > Hello Milton,
> > 
> > thanks for that beautiful R-hack !
> > Since I am working on a minimal "bread and butter" machine 
> I went for Moritz' solution but it's a neat idea to use R for 
> the task.
> > 
> > Eventually, GIS-hacking should become part of the Olympics 
> and you all should try to get medals :-)
> 
> 
> Actually, I stand corrected. Daniel was right: v.reclass does allow 
> character columns and v.dissolve, therefore, does as well. I 
> just tested 
> with a map as it works with current svn trunk and and old 
> pre-release 6.3:
> 
>  > v.info -c NUTS2_2006
> Displaying column types/names for database connection of layer 1:
> INTEGER|cat
> INTEGER|objectid
> CHARACTER|cntr_code
> INTEGER|stat_levl_
> CHARACTER|nuts_id
> DOUBLE PRECISION|shape_leng
> DOUBLE PRECISION|shape_area
> 
>  > v.dissolve in=NUTS2_2006 col=cntr_code out=countries
> 
> And I get a nice countries map...
> 
> 
> So your error message is a bug:
> 
> > results in dbmi: Protocol error ERROR: Cannot open select cursor:
> >> >> SELECT cat, FIPS_1 FROM counties ORDER BY FIPS_1 ERROR: 
> Unable to
> >> >> open vector map <counties_fips1_22157 at admin_borders> on topology
> >> >> level 2 WARNING: Table <counties_fips1_22157> linked to 
> vector map
> >> >> <counties_fips1_22157> does not exist ERROR: Vector map
> >> >> <counties_fips1> not found in the current mapset
> 
> Could you post the output of 'v.info -c counties' ?
> 
> Moritz
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