[GRASS-user] Region and not-processed data

Kim_Besson1 · September 27, 2010, 1:52pm

Greetings

I have a very “dumb” question regarding region definition/processing:

I have defined a an area (example; 30N 20S -10W -5W). I have a raster image with (30N 15N -7W -5) I mean, it only cover a part of the region. If I run GRASS image-processing algorithms and processors does it run in all image or only where I have a raster image?

Thanks and sorry for tyhis such a dumb question
Kim

Stephen_Sefick1 · September 27, 2010, 1:55pm

I get a little confused with the region raster processing stuff also.
But, this is what I do, and it seems to work. Anything that is
brought in from the outside (r.in.*) will import the entire map.
Anything that is done withing GRASS will respect the region. So, just
make sure to set the region before each calculation and you should be
OK.

On Mon, Sep 27, 2010 at 8:52 AM, Kim Besson <kimbesson1981@gmail.com> wrote:

Greetings

I have a very "dumb" question regarding region definition/processing:
- I have defined a an area (example; 30N 20S -10W -5W). I have a raster
image with (30N 15N -7W -5) I mean, it only cover a part of the region. If I
run GRASS image-processing algorithms and processors does it run in all
image or only where I have a raster image?

Thanks and sorry for tyhis such a dumb question
Kim
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.

                            \-K\. Mullis

"A big computer, a complex algorithm and a long time does not equal science."

                          \-Robert Gentleman

Kim_Besson1 · September 27, 2010, 1:58pm

Hi stephen and rest of GRASS users

That was not my quiestion. My question is: if a have a an uimage inside a regions, will it process and run for all the region or only for where I have the image(it’s not importing only image-processing). ?

Thanks
Kim

2010/9/27 stephen sefick <ssefick@gmail.com>

I get a little confused with the region raster processing stuff also.
But, this is what I do, and it seems to work. Anything that is
brought in from the outside (r.in.*) will import the entire map.
Anything that is done withing GRASS will respect the region. So, just
make sure to set the region before each calculation and you should be
OK.

On Mon, Sep 27, 2010 at 8:52 AM, Kim Besson <kimbesson1981@gmail.com> wrote:

Greetings

I have a very “dumb” question regarding region definition/processing:

I have defined a an area (example; 30N 20S -10W -5W). I have a raster
image with (30N 15N -7W -5) I mean, it only cover a part of the region. If I
run GRASS image-processing algorithms and processors does it run in all
image or only where I have a raster image?

Thanks and sorry for tyhis such a dumb question
Kim

grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

–
Stephen Sefick

| Auburn University |
| Department of Biological Sciences |
| 331 Funchess Hall |
| Auburn, Alabama |
| 36849 |
||
| sas0025@auburn.edu |
| http://www.auburn.edu/~sas0025 |
||

Let’s not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.

-K. Mullis

“A big computer, a complex algorithm and a long time does not equal science.”

-Robert Gentleman

Stephen_Sefick1 · September 27, 2010, 2:01pm

Where you don't have the image, if I understand you correctly, would
be NULL values? In that case you will have to default to someone more
experienced, but I suspect that it is run on the entire map, but NULL
means no data so no process. Just a wag.
hth

Stephen

On Mon, Sep 27, 2010 at 8:58 AM, Kim Besson <kimbesson1981@gmail.com> wrote:

Hi stephen and rest of GRASS users

That was not my quiestion. My question is: if a have a an uimage inside a
regions, will it process and run for all the region or only for where I have
the image(it's not importing only image-processing). ?

Thanks
Kim

2010/9/27 stephen sefick <ssefick@gmail.com>
I get a little confused with the region raster processing stuff also.
But, this is what I do, and it seems to work. Anything that is
brought in from the outside (r.in.*) will import the entire map.
Anything that is done withing GRASS will respect the region. So, just
make sure to set the region before each calculation and you should be
OK.

On Mon, Sep 27, 2010 at 8:52 AM, Kim Besson <kimbesson1981@gmail.com>
wrote:
> Greetings
>
> I have a very "dumb" question regarding region definition/processing:
> - I have defined a an area (example; 30N 20S -10W -5W). I have a raster
> image with (30N 15N -7W -5) I mean, it only cover a part of the region.
> If I
> run GRASS image-processing algorithms and processors does it run in all
> image or only where I have a raster image?
>
> Thanks and sorry for tyhis such a dumb question
> Kim
> _______________________________________________
> grass-user mailing list
> grass-user@lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user
>
>

--
Stephen Sefick
____________________________________
| Auburn University |
| Department of Biological Sciences |
| 331 Funchess Hall |
| Auburn, Alabama |
| 36849 |
|___________________________________|
| sas0025@auburn.edu |
| http://www.auburn.edu/~sas0025 |
|___________________________________|

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.
                            \-K\. Mullis
"A big computer, a complex algorithm and a long time does not equal
science."
                          \-Robert Gentleman

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.

                            \-K\. Mullis

"A big computer, a complex algorithm and a long time does not equal science."

                          \-Robert Gentleman

Kim_Besson1 · September 28, 2010, 1:17pm

Hi

Ok about this I just need to have an idea (or a link that can explain me this):
1- When I import a raster map (r.in.gdal) will it import all the raster or only the portion that fits in the current defined region?
2- If I define as a region a wider area than the image, will it process where the image is not available?

Thanks
Kim

2010/9/27 stephen sefick <ssefick@gmail.com>

Where you don’t have the image, if I understand you correctly, would
be NULL values? In that case you will have to default to someone more
experienced, but I suspect that it is run on the entire map, but NULL
means no data so no process. Just a wag.
hth

Stephen

On Mon, Sep 27, 2010 at 8:58 AM, Kim Besson <kimbesson1981@gmail.com> wrote:

Hi stephen and rest of GRASS users

That was not my quiestion. My question is: if a have a an uimage inside a
regions, will it process and run for all the region or only for where I have
the image(it’s not importing only image-processing). ?

Thanks
Kim

2010/9/27 stephen sefick <ssefick@gmail.com>

I get a little confused with the region raster processing stuff also.
But, this is what I do, and it seems to work. Anything that is
brought in from the outside (r.in.*) will import the entire map.
Anything that is done withing GRASS will respect the region. So, just
make sure to set the region before each calculation and you should be
OK.

On Mon, Sep 27, 2010 at 8:52 AM, Kim Besson <kimbesson1981@gmail.com>
wrote:

Greetings

I have a very “dumb” question regarding region definition/processing:

I have defined a an area (example; 30N 20S -10W -5W). I have a raster
image with (30N 15N -7W -5) I mean, it only cover a part of the region.
If I
run GRASS image-processing algorithms and processors does it run in all
image or only where I have a raster image?

Thanks and sorry for tyhis such a dumb question
Kim

grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

–
Stephen Sefick

| Auburn University |
| Department of Biological Sciences |
| 331 Funchess Hall |
| Auburn, Alabama |
| 36849 |
||
| sas0025@auburn.edu |
| http://www.auburn.edu/~sas0025 |
||

Let’s not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.

-K. Mullis

“A big computer, a complex algorithm and a long time does not equal
science.”

-Robert Gentleman

–

Stephen Sefick

| Auburn University |
| Department of Biological Sciences |
| 331 Funchess Hall |
| Auburn, Alabama |
| 36849 |
||
| sas0025@auburn.edu |
| http://www.auburn.edu/~sas0025 |
||

Let’s not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.

-K. Mullis

“A big computer, a complex algorithm and a long time does not equal science.”

-Robert Gentleman

Stephen_Sefick1 · September 28, 2010, 1:33pm

This thread in the archives may answer your questions.

http://osgeo-org.1803224.n2.nabble.com/Import-question-td5551110.html#a5558429

HTH,

Stephen Sefick

On Tue, Sep 28, 2010 at 8:17 AM, Kim Besson <kimbesson1981@gmail.com> wrote:

Hi
Ok about this I just need to have an idea (or a link that can explain me
this):
1- When I import a raster map (r.in.gdal) will it import all the raster or
only the portion that fits in the current defined region?
2- If I define as a region a wider area than the image, will it process
where the image is not available?
Thanks
Kim

2010/9/27 stephen sefick <ssefick@gmail.com>
Where you don't have the image, if I understand you correctly, would
be NULL values? In that case you will have to default to someone more
experienced, but I suspect that it is run on the entire map, but NULL
means no data so no process. Just a wag.
hth

Stephen

On Mon, Sep 27, 2010 at 8:58 AM, Kim Besson <kimbesson1981@gmail.com>
wrote:
> Hi stephen and rest of GRASS users
>
> That was not my quiestion. My question is: if a have a an uimage inside
> a
> regions, will it process and run for all the region or only for where I
> have
> the image(it's not importing only image-processing). ?
>
> Thanks
> Kim
>
> 2010/9/27 stephen sefick <ssefick@gmail.com>
>>
>> I get a little confused with the region raster processing stuff also.
>> But, this is what I do, and it seems to work. Anything that is
>> brought in from the outside (r.in.*) will import the entire map.
>> Anything that is done withing GRASS will respect the region. So, just
>> make sure to set the region before each calculation and you should be
>> OK.
>>
>> On Mon, Sep 27, 2010 at 8:52 AM, Kim Besson <kimbesson1981@gmail.com>
>> wrote:
>> > Greetings
>> >
>> > I have a very "dumb" question regarding region definition/processing:
>> > - I have defined a an area (example; 30N 20S -10W -5W). I have a
>> > raster
>> > image with (30N 15N -7W -5) I mean, it only cover a part of the
>> > region.
>> > If I
>> > run GRASS image-processing algorithms and processors does it run in
>> > all
>> > image or only where I have a raster image?
>> >
>> > Thanks and sorry for tyhis such a dumb question
>> > Kim
>> > _______________________________________________
>> > grass-user mailing list
>> > grass-user@lists.osgeo.org
>> > http://lists.osgeo.org/mailman/listinfo/grass-user
>> >
>> >
>>
>>
>>
>> --
>> Stephen Sefick
>> ____________________________________
>> | Auburn University |
>> | Department of Biological Sciences |
>> | 331 Funchess Hall |
>> | Auburn, Alabama |
>> | 36849 |
>> |___________________________________|
>> | sas0025@auburn.edu |
>> | http://www.auburn.edu/~sas0025 |
>> |___________________________________|
>>
>> Let's not spend our time and resources thinking about things that are
>> so little or so large that all they really do for us is puff us up and
>> make us feel like gods. We are mammals, and have not exhausted the
>> annoying little problems of being mammals.
>>
>> -K. Mullis
>>
>> "A big computer, a complex algorithm and a long time does not equal
>> science."
>>
>> -Robert Gentleman
>
>

--
Stephen Sefick
____________________________________
| Auburn University |
| Department of Biological Sciences |
| 331 Funchess Hall |
| Auburn, Alabama |
| 36849 |
|___________________________________|
| sas0025@auburn.edu |
| http://www.auburn.edu/~sas0025 |
|___________________________________|

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.
                            \-K\. Mullis
"A big computer, a complex algorithm and a long time does not equal
science."
                          \-Robert Gentleman
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.

                            \-K\. Mullis

"A big computer, a complex algorithm and a long time does not equal science."

                          \-Robert Gentleman