[GRASS-user] [GRASSLIST:1121] GIS-> GRASS translation page up and running

GRASS GRASS user
1

http://grass.gdf-hannover.de/wiki/GIS_to_GRASS_command_translation

I decided to make the page a bit more open to other GIS packages, so if you
use something besides ESRI this is the place to put your info as well --
note that I have two levels of the Discussion on wiki, the software and the
command. If you edit this please put the GIS command (and within-page link)
and the basic GRASS command in the quick reference table, but in the
discussion copy the table from the LATTICESPOT to put the full GIS command
(with all of the input/output variables) and the full grass command (or
commands in a numbered list if you need > 1 grass command to replicate the
other software's feature) with all of the grass inputs/outputs (using the
same variable names, when possible). You should include a "Discrepancies"
section (bulleted) if there are any differences between the GIS software
command and GRASS's.

Note that for ARC-INFO commands I'm using ESRI's variable syntax copied
directly from the ARC/INFO help manual. It would be useful to keep up this
practice for all other ARC-INFO commands.

Any initial suggestions please let me know and I'll modify the formatting
appropriately! Do you think the quick-reference table needs any more
columns, e.g. Some indication whether the external GIS command can be
replicated "perfectly" by GRASS or if there are major differences between
the two?

--j

--
Jonathan A. Greenberg, PhD
NRC Research Associate
NASA Ames Research Center
MS 242-4
Moffett Field, CA 94035-1000
650-604-5896
AIM: jgrn307
MSN: jgrn307@hotmail.com

2

i think it would be good to have some attribute marking if the command function is identical, or deviates substantially. (for workstation command line)

nice job on the page! thanks this will be a great resource.

On 6/19/06, Jonathan Greenberg <jgreenberg@arc.nasa.gov > wrote:

http://grass.gdf-hannover.de/wiki/GIS_to_GRASS_command_translation

I decided to make the page a bit more open to other GIS packages, so if you
use something besides ESRI this is the place to put your info as well –
note that I have two levels of the Discussion on wiki, the software and the
command. If you edit this please put the GIS command (and within-page link)
and the basic GRASS command in the quick reference table, but in the
discussion copy the table from the LATTICESPOT to put the full GIS command
(with all of the input/output variables) and the full grass command (or
commands in a numbered list if you need > 1 grass command to replicate the
other software’s feature) with all of the grass inputs/outputs (using the
same variable names, when possible). You should include a “Discrepancies”
section (bulleted) if there are any differences between the GIS software
command and GRASS’s.

Note that for ARC-INFO commands I’m using ESRI’s variable syntax copied
directly from the ARC/INFO help manual. It would be useful to keep up this
practice for all other ARC-INFO commands.

Any initial suggestions please let me know and I’ll modify the formatting
appropriately! Do you think the quick-reference table needs any more
columns, e.g. Some indication whether the external GIS command can be
replicated “perfectly” by GRASS or if there are major differences between
the two?

–j

–
Jonathan A. Greenberg, PhD
NRC Research Associate
NASA Ames Research Center
MS 242-4
Moffett Field, CA 94035-1000
650-604-5896
AIM: jgrn307
MSN: jgrn307@hotmail.com

grassuser mailing list
grassuser@grass.itc.it
http://grass.itc.it/mailman/listinfo/grassuser

3

Done and done! Quick wiki question: I'm trying to fill out the ARC GRID
operator vs. r.mapcalc section, and one of the operators is "||" ("or"),
which is also the command for "next cell" in wiki-table lingo. How do I get
the table to NOT make a new cell and instead display the text "||" (no
quotes) in a cell?

--j

--

Jonathan A. Greenberg, PhD
NRC Research Associate
NASA Ames Research Center
MS 242-4
Moffett Field, CA 94035-1000
Phone: 415-794-5043
AIM: jgrn3007
MSN: jgrn3007@hotmail.com

  _____

From: M S [mailto:mseibel@gmail.com]
Sent: Monday, June 19, 2006 4:29 PM
To: Jonathan Greenberg
Cc: GRASS user list
Subject: Re: [GRASS-user] [GRASSLIST:1121] GIS-> GRASS translation page up
and running

i think it would be good to have some attribute marking if the command
function is identical, or deviates substantially. (for workstation command
line)

nice job on the page! thanks this will be a great resource.

On 6/19/06, Jonathan Greenberg <jgreenberg@arc.nasa.gov > wrote:

http://grass.gdf-hannover.de/wiki/GIS_to_GRASS_command_translation

I decided to make the page a bit more open to other GIS packages, so if you
use something besides ESRI this is the place to put your info as well --
note that I have two levels of the Discussion on wiki, the software and the
command. If you edit this please put the GIS command (and within-page link)
and the basic GRASS command in the quick reference table, but in the
discussion copy the table from the LATTICESPOT to put the full GIS command
(with all of the input/output variables) and the full grass command (or
commands in a numbered list if you need > 1 grass command to replicate the
other software's feature) with all of the grass inputs/outputs (using the
same variable names, when possible). You should include a "Discrepancies"
section (bulleted) if there are any differences between the GIS software
command and GRASS's.

Note that for ARC-INFO commands I'm using ESRI's variable syntax copied
directly from the ARC/INFO help manual. It would be useful to keep up this
practice for all other ARC-INFO commands.

Any initial suggestions please let me know and I'll modify the formatting
appropriately! Do you think the quick-reference table needs any more
columns, e.g. Some indication whether the external GIS command can be
replicated "perfectly" by GRASS or if there are major differences between
the two?

--j

--
Jonathan A. Greenberg, PhD
NRC Research Associate
NASA Ames Research Center
MS 242-4
Moffett Field, CA 94035-1000
650-604-5896
AIM: jgrn307
MSN: jgrn307@hotmail.com

_______________________________________________
grassuser mailing list
grassuser@grass.itc.it
http://grass.itc.it/mailman/listinfo/grassuser

4

Jonathan Greenberg wrote:

Quick wiki question: I'm trying to fill out the ARC GRID
operator vs. r.mapcalc section, and one of the operators is "||"
("or"), which is also the command for "next cell" in wiki-table lingo.
How do I get the table to NOT make a new cell and instead display the
text "||" (no quotes) in a cell?

use HTML codes,

if( a &#124;&#124; b )

see http://www.ascii.cl/htmlcodes.htm

Note that for ARC-INFO commands I'm using ESRI's variable syntax
copied directly from the ARC/INFO help manual. It would be useful to
keep up this practice for all other ARC-INFO commands.

be very careful not to cut and paste any ESRI copyrighted material into
the Wiki.

Some indication whether the external GIS command can be replicated
"perfectly" by GRASS or if there are major differences
between the two?

I think in almost all cases it should be assumed the output will be
slightly different between implementations.

[...] For instance, how can we solve the z_factor discrepancy -- how
do I multiply a GRASS vector column by a fixed value?
This would remove that discrepancy between the ARC and GRASS.

If I understand correctly, you can do that directly in the [v.]db.select
SQL statement.

http://grass.ibiblio.org/grass61/manuals/html61_user/sql.html

Hamish

5

On Monday 19 June 2006 16:06, Jonathan Greenberg wrote:

http://grass.gdf-hannover.de/wiki/GIS_to_GRASS_command_translation

I decided to make the page a bit more open to other GIS packages, so if you
use something besides ESRI this is the place to put your info as well --
note that I have two levels of the Discussion on wiki, the software and the
command. If you edit this please put the GIS command (and within-page
link) and the basic GRASS command in the quick reference table, but in the
discussion copy the table from the LATTICESPOT to put the full GIS command
(with all of the input/output variables) and the full grass command (or
commands in a numbered list if you need > 1 grass command to replicate the
other software's feature) with all of the grass inputs/outputs (using the
same variable names, when possible). You should include a "Discrepancies"
section (bulleted) if there are any differences between the GIS software
command and GRASS's.

Nice job Jonathan.

A bit off topic, but noticed that v.what.rast is using nearest neighbor
interpolation by default. If I remember correctly Markus moved such sampling
functionality into a standard GRASS library, so it shouldn't be too hard to
setup v.what.rast to support NN,bilinear,cubic convolution ...

Maybe I will check into this when I have a chance.

--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341