[GRASS-user] v.to.rast error in version 7.0.6svn

GRASS GRASS user
1

Group,
While executing v.to.rast the following error came up (not present in earlier 7.0 version)
Inline image 3

Your suggestion is appreciated.

Thanks
Alassane

2

On Tue, Oct 18, 2016 at 9:31 PM, alassane toure <atourej@gmail.com> wrote:

Group,
While executing v.to.rast the following error came up (not present in
earlier 7.0 version)
Your suggestion is appreciated.

Check your database connection for the input vector, it says:
"Database connection not defined for layer <1>"

using v.db.connect -p vector_name

Anna

Thanks
Alassane

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

3

Anna,
is that the command needed to make the connection? …

db.connect driver=sqlite database='$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db'
db.tables -p
v.db.connect map=vectormap table=table driver=sqlite \
             database='$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db'
v.db.connect -p map=vectormap



Thanks,

Alassane
···

On Tue, Oct 18, 2016 at 9:46 PM, Anna Petrášová <kratochanna@gmail.com> wrote:

On Tue, Oct 18, 2016 at 9:31 PM, alassane toure <atourej@gmail.com> wrote:

Group,
While executing v.to.rast the following error came up (not present in earlier 7.0 version)

Your suggestion is appreciated.

Check your database connection for the input vector, it says:
“Database connection not defined for layer <1>”

using v.db.connect -p vector_name

Anna

Thanks

Alassane

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

4

On Tue, Oct 18, 2016 at 11:21 PM, alassane toure <atourej@gmail.com> wrote:

Anna,
is that the command needed to make the connection? ...

No, it just shows you the current connection, I was just trying to
analyze the problem.

db.connect driver=sqlite
database='$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db'
db.tables -p
v.db.connect map=vectormap table=table driver=sqlite \
             database='$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db'
v.db.connect -p map=vectormap

Thanks,

Alassane

On Tue, Oct 18, 2016 at 9:46 PM, Anna Petrášová <kratochanna@gmail.com>
wrote:

On Tue, Oct 18, 2016 at 9:31 PM, alassane toure <atourej@gmail.com> wrote:

Group,
While executing v.to.rast the following error came up (not present in
earlier 7.0 version)
Your suggestion is appreciated.

Check your database connection for the input vector, it says:
"Database connection not defined for layer <1>"

using v.db.connect -p vector_name

Anna

Thanks
Alassane

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

5

Anna,
I run the command you suggested and there is indeed a connection problem. How do i fix it? Here are the commands i run in a grass/python script:

criteria=“(value=255) and (area_sf>”+sys.argv[5]+“)”
grass.run_command(‘v.extract’, input=‘imperv’, output=‘impervh_clean’,type=‘area’,where=criteria)

Here is the command yielding the database connection error…

grass.run_command(‘v.to.rast’, input=‘impervh_clean’, output=‘impervh_clean1’,use=‘attr’,attribute_column=‘value’)

Any suggestion to establish db connection for vector map “impervh_clean”?

Regards,

Alassane

···

On Tue, Oct 18, 2016 at 11:29 PM, Anna Petrášová <kratochanna@gmail.com> wrote:

On Tue, Oct 18, 2016 at 11:21 PM, alassane toure <atourej@gmail.com> wrote:

Anna,
is that the command needed to make the connection? …

No, it just shows you the current connection, I was just trying to
analyze the problem.

db.connect driver=sqlite
database=‘$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db’
db.tables -p
v.db.connect map=vectormap table=table driver=sqlite
database=‘$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db’
v.db.connect -p map=vectormap

Thanks,

Alassane

On Tue, Oct 18, 2016 at 9:46 PM, Anna Petrášová <kratochanna@gmail.com>
wrote:

On Tue, Oct 18, 2016 at 9:31 PM, alassane toure <atourej@gmail.com> wrote:

Group,
While executing v.to.rast the following error came up (not present in
earlier 7.0 version)
Your suggestion is appreciated.

Check your database connection for the input vector, it says:
“Database connection not defined for layer <1>”

using v.db.connect -p vector_name

Anna

Thanks
Alassane

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

6

On Tue, Oct 18, 2016 at 11:56 PM, alassane toure <atourej@gmail.com> wrote:

Anna,
I run the command you suggested and there is indeed a connection problem.
How do i fix it? Here are the commands i run in a grass/python script:

criteria="(value=255) and (area_sf>"+sys.argv[5]+")"
grass.run_command('v.extract', input='imperv',
output='impervh_clean',type='area',where=criteria)

Here is the command yielding the database connection error...

grass.run_command('v.to.rast', input='impervh_clean',
output='impervh_clean1',use='attr',attribute_column='value')

Any suggestion to establish db connection for vector map "impervh_clean"?

That's hard to say from this, check whether the v.extract gives any
warning and if it extracts any features.

Regards,

Alassane

On Tue, Oct 18, 2016 at 11:29 PM, Anna Petrášová <kratochanna@gmail.com>
wrote:

On Tue, Oct 18, 2016 at 11:21 PM, alassane toure <atourej@gmail.com>
wrote:
> Anna,
> is that the command needed to make the connection? ...

No, it just shows you the current connection, I was just trying to
analyze the problem.

>
> db.connect driver=sqlite
> database='$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db'
> db.tables -p
> v.db.connect map=vectormap table=table driver=sqlite \
>
> database='$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db'
> v.db.connect -p map=vectormap
>
>
> Thanks,
>
> Alassane
>
>
> On Tue, Oct 18, 2016 at 9:46 PM, Anna Petrášová <kratochanna@gmail.com>
> wrote:
>>
>>
>>
>> On Tue, Oct 18, 2016 at 9:31 PM, alassane toure <atourej@gmail.com>
>> wrote:
>>>
>>> Group,
>>> While executing v.to.rast the following error came up (not present in
>>> earlier 7.0 version)
>>> Your suggestion is appreciated.
>>
>>
>> Check your database connection for the input vector, it says:
>> "Database connection not defined for layer <1>"
>>
>> using v.db.connect -p vector_name
>>
>> Anna
>>
>>>
>>> Thanks
>>> Alassane
>>>
>>> _______________________________________________
>>> grass-user mailing list
>>> grass-user@lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/grass-user
>>
>>
>

7

correct. there was no feature in “impervh_clean” !

···

On Wed, Oct 19, 2016 at 12:01 AM, Anna Petrášová <kratochanna@gmail.com> wrote:

On Tue, Oct 18, 2016 at 11:56 PM, alassane toure <atourej@gmail.com> wrote:

Anna,
I run the command you suggested and there is indeed a connection problem.
How do i fix it? Here are the commands i run in a grass/python script:

criteria=“(value=255) and (area_sf>”+sys.argv[5]+“)”
grass.run_command(‘v.extract’, input=‘imperv’,
output=‘impervh_clean’,type=‘area’,where=criteria)

Here is the command yielding the database connection error…

grass.run_command(‘v.to.rast’, input=‘impervh_clean’,
output=‘impervh_clean1’,use=‘attr’,attribute_column=‘value’)

Any suggestion to establish db connection for vector map “impervh_clean”?

That’s hard to say from this, check whether the v.extract gives any
warning and if it extracts any features.

Regards,

Alassane

On Tue, Oct 18, 2016 at 11:29 PM, Anna Petrášová <kratochanna@gmail.com>
wrote:

On Tue, Oct 18, 2016 at 11:21 PM, alassane toure <atourej@gmail.com>
wrote:

Anna,
is that the command needed to make the connection? …

No, it just shows you the current connection, I was just trying to
analyze the problem.

db.connect driver=sqlite
database=‘$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db’
db.tables -p
v.db.connect map=vectormap table=table driver=sqlite \

database=‘$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db’
v.db.connect -p map=vectormap

Thanks,

Alassane

On Tue, Oct 18, 2016 at 9:46 PM, Anna Petrášová <kratochanna@gmail.com>
wrote:

On Tue, Oct 18, 2016 at 9:31 PM, alassane toure <atourej@gmail.com>
wrote:

Group,
While executing v.to.rast the following error came up (not present in
earlier 7.0 version)
Your suggestion is appreciated.

Check your database connection for the input vector, it says:
“Database connection not defined for layer <1>”

using v.db.connect -p vector_name

Anna

Thanks
Alassane

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