R: [Qgis-developer] GRASS toolbox enhancements

[Marco Pasetti]

Hi Leo,

>> 1.1) g.region.raster - Set the region to match a raster map
> You can make it from the browser, I think is not useful add repetitive
modules

Right (I realized it later). I'll remove it.

>> 1.3) g.region.region - Set the region from a named region
> You can make it from the browser

Right. To be removed.

>> 1.4) g.region.res - Change the 2D grid resolution (both N-S and E-W) 
>> of the current region
> You can make it from the manage GRASS region icon

Right. To be removed.

>> 1.5) g.region.save - Save the current region as a named region
> Already present

Yes, the old g.region: if we introduce different g.region modules I think
that we should suffix the related command names to recognize them

>> 1.6) g.region.vector - Set the region to match a vector map
> You can make it from the browser

Right. To be removed.

>> 6.1) v.in.ogr.list - list all available layers in a given OGR data 
>> source
>I think that no necessary modules must not be inserted in qgis BECAUSE IT
CAN INCREASE THE COMPLEXITY OF THE grass TOOLS

I agree. To be removed.

>> 6.2) v.in.ogr - Import OGR/PostGIS vector layers
>Already present

Yes. But it was not working. I modified it.

>> 6.3) v.in.ogr.loc - Import OGR/PostGIS vector layers and create a 
>> fitted location
>Already present

Yes. But it was not working. I modified it.

>> 6.6) v.in.shape - Import ESRI Shapefile vector layers
>> 6.7) v.in.shape.loc - Import ESRI Shapefile vector layers and create a 
>> fitted location

>Why this attention for shapefile?

Mainly because of:
1) It's a very widespread data format; many data, publicly available on the
internet for free, are in shape file format
2) It's the most diffuse format of the main commercial competitor of the OS
GIS solution; it's important, IMHO, to underline that we (GRASS and QGIS)
are able to easily manage also this format, and so that an *OS migration*
with us could be very easy and painless
3) The v.in.shape command has a special syntax for the ESRI Shapefiles that
makes, only for that purpose, the module *filling* a lot easier
4) Many vector datasets, such as the DCW and VMAP datasets, need the OGDI
support and the AVCE00 and E00Compr Libraries to be imported. Since the OGDI
support has not been added to the GDAL in WinGRASS (task added), the AVCE00
and E00Compr still not compiled (task added, and already done... but there's
a *spaces* bug in v.in.e00, probably already fixed but still not backported
to GRASS 6.3.0), and because the VMAP0 dataset is freely available also in
Shapefile format, I guess that a straight way to import ESRI Shape files is
an important thing to have.

Riassuming:

NEW MODULES TO KILL:
---------------------------------------
- g.region.raster
- g.region.region
- g.region.res
- g.region.vector
- v.in.ogr.list

NEW/MODIFIED/RENAMED MODULES TO KEEP:
---------------------------------------
- g.save
- g.region.zoom
- g.region.multiple.raster
- g.region.multiple.vector
- r.patch
- v.patch
- r.proj
- r.proj.res
- v.in.db
- v.in.ogr
- v.in.ogr.loc
- v.in.ogr.all
- v.in.ogr.all.loc
- v.in.shape
- v.in.shape.loc

This said other 2 questions:

1) Why I cannot close a mapset? Error reported: Cannot remove mapset lock

2) It would be good to have also a module like:

g.proj.georef - Read projection information of/from a georeferenced file
(raster, vector or image)

We could put it in the File section

Marco



-----Messaggio originale-----
Da: lami at faunalia.it [mailto:lami at faunalia.it] 
Inviato: giovedì 15 maggio 2008 11.23
A: marco.pasetti at alice.it
Cc: qgis-developer at lists.osgeo.org
Oggetto: Re: [Qgis-developer] GRASS toolbox enhancements


Hi Marco,
I'm happy that you'd like to work on GRASS tools.
I write some suggestion to you about your news:
>
> 1) I removed the g.region module and replaced it with 8 different 
> g.region modules.

> Here's the new modules:
> 1.1) g.region.raster - Set the region to match a raster map
 You can make it from the browser, I think is not useful add repetitive
modules

> 1.2) g.region.multiple.raster - Set the region to match multiple 
> raster maps *
Ok

> 1.3) g.region.region - Set the region from a named region
 You can make it from the browser

> 1.4) g.region.res - Change the 2D grid resolution (both N-S and E-W) 
> of the current region
 You can make it from the manage GRASS region icon

> 1.5) g.region.save - Save the current region as a named region
 Already present

> 1.6) g.region.vector - Set the region to match a vector map
 You can make it from the browser

> 1.7) g.region.multiple.vector - Set the region to match multiple 
> vector maps *
Ok

> 1.8) g.region.zoom - Shrink the current region until it meets non-NULL 
> data from a given raster map
Ok

>
> * this is actually a walk-around; I needed to set the option as file 
> to let user type in multiple map names separated by a comma; the 
> single version, though, is very comfortable because it automatically 
> lists all the map available in the work space... even if you can't 
> select more than one
>
> 2) I added the r.patch module; such as the g.region.multiple.* 
> modules, this is a walk-around
A old problem for this kind of modules
>
> 3) I modified the r.proj module, that was useless since it was 
> impossible to select the raster map to reproject; such as the r.patch 
> modules, this is a walk-around

idem
>
> 4) I added the r.proj.res module; it's the copy of the r.proj module, 
> plus the feature to let redifine the resolution of the raster map 
> while reprojecting
Ok

>
> 5) I modified the v.in.db module; now it's possible to pick up the db 
> file via GUI, select the table name and db driver
Good

>
> 6) I worked on the v.in.ogr module: the module was useless since it 
> was impossible to select the input and parameters values; I fixed it, 
> added some important options and flags, and re-designed the v.in.ogr 
> modules as
> follows:
>
> 6.1) v.in.ogr.list - list all available layers in a given OGR data 
> source
I think that no necessary modules must not be inserted in qgis BECAUSE IT
CAN INCREASE THE COMPLEXITY OF THE grass TOOLS

> 6.2) v.in.ogr - Import OGR/PostGIS vector layers
Already present

> 6.3) v.in.ogr.loc - Import OGR/PostGIS vector layers and create a 
> fitted location
Already present

> 6.4) v.in.ogr.all - Import all the OGR/PostGIS vector layers in a 
> given data source
Ok

> 6.5) v.in.ogr.all.loc - Import all the OGR/PostGIS vector layers in a 
> given data source and create a fitted location
Ok

> 6.6) v.in.shape - Import ESRI Shapefile vector layers
> 6.7) v.in.shape.loc - Import ESRI Shapefile vector layers and create a 
> fitted location

Why this attention for shapefile?

>
> The last two modules are very comfortable since they use the *pick up* 
> file GUI tool, with a filter set to *shp files
>
> 7) I added the v.patch module; such as the r.patch modules, this is a 
> walk-around
>

Good WORK!!

Leonardo