[GRASS-user] help with temporal modules

GRASS GRASS user
1

Dear grass-users,

HI! This is my first time writing to the list. I’m really interested in using the temporal modules for some spatio-temporal analysis of MODIS Cl-a mapped L3 product, but i can’t even run the example in t.create manual page [0]. I’m using GRASS 7 (r59147, re-compiled yesterday) under Fedora 19.

I’d like to know which are the steps I should follow to start working with these modules??? Do I need to install some extra package or library??? Here’s what I’ve tried and the messages I got:

GRASS 7.0.svn (ll_wgs84):~ > t.connect -d
Default driver / database set to:
driver: sqlite
database: /home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db

GRASS 7.0.svn (ll_wgs84):~ > t.connect -p
driver:sqlite
database:/home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db

GRASS 7.0.svn (ll_wgs84):~ > MAPS=“map_1 map_2 map_3 map_4 map_5 map_6 map_7”
GRASS 7.0.svn (ll_wgs84):~ > for map in ${MAPS} ; do

r.mapcalc --o expr=“${map} = rand(0, 10)”
echo ${map} >> map_list.txt
done

… it creates the maps, of course, but then…

GRASS 7.0.svn (ll_wgs84):~ > t.create type=strds temporaltype=absolute output=precipitation_daily title=“Daily precipitation” description=“Test dataset with daily precipitation”
ERROR: Unable to receiving temporal database metadata.
Current temporal database info:
DBMI interface:… sqlite3
Temporal database:…
/home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db

GRASS 7.0.svn (ll_wgs84):~ > t.register -i type=rast input=precipitation_daily file=map_list.txt start=2012-08-20 increment=“1 days”
ERROR: Unable to receiving temporal database metadata.
Current temporal database info:
DBMI interface:… sqlite3
Temporal database:…
/home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db

GRASS 7.0.svn (ll_wgs84):~ > t.info type=strds input=precipitation_daily
ERROR: Unable to receiving temporal database metadata.
Current temporal database info:
DBMI interface:… sqlite3
Temporal database:…
/home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db

I’ve noticed there are 2 slashes in “/home/veroandreo/grassdata**//**ll_wgs84/PERMANENT/tgis/sqlite.db” → tried changing that by defining it with t.connect, but when i run the example gain, I got the same messages as before…

What am I doing wrong? or what am I lacking here??? Would you please help me???

THANKS A LOT IN ADVANCE!
And sorry for making (surely) a very silly question :stuck_out_tongue:

Vero

[0] http://grass.osgeo.org/grass70/manuals/keywords.html

2

Dear Veronica,
it seems that the temporal database in the location that you use has
been created with an older version of grass7. I have modified grass7
in the last months to increase performance and reliability of the
temporal framework and therefore changed the database format. The new
API is not backward compatible.

Can you please create a fresh location from scratch with the latest
grass7 svn version? In case you want to use the same location, then
please make a backup of the existing temporal database (in case you
have already data registered), by simple renaming it:

mv /home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db \
     /home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db.backup

A new temporal database with the same name will be created, when you
invoke any temporal command. You can access any data in the old
database using a sqlite client application, or open office. You will
need to install the grass7 svn version from August 2013, to use the
old temporal database within grass7.

Best regards
Soeren

2014-02-28 21:07 GMT+05:30 Veronica Andreo <veroandreo@gmail.com>:

Dear grass-users,

HI! This is my first time writing to the list. I'm really interested in
using the temporal modules for some spatio-temporal analysis of MODIS Cl-a
mapped L3 product, but i can't even run the example in t.create manual page
[0]. I'm using GRASS 7 (r59147, re-compiled yesterday) under Fedora 19.

I'd like to know which are the steps I should follow to start working with
these modules??? Do I need to install some extra package or library???
Here's what I've tried and the messages I got:

GRASS 7.0.svn (ll_wgs84):~ > t.connect -d
Default driver / database set to:
driver: sqlite
database: /home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db

GRASS 7.0.svn (ll_wgs84):~ > t.connect -p
driver:sqlite
database:/home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db

GRASS 7.0.svn (ll_wgs84):~ > MAPS="map_1 map_2 map_3 map_4 map_5 map_6
map_7"
GRASS 7.0.svn (ll_wgs84):~ > for map in ${MAPS} ; do

    r.mapcalc --o expr="${map} = rand(0, 10)"
    echo ${map} >> map_list.txt
done

.... it creates the maps, of course, but then...

GRASS 7.0.svn (ll_wgs84):~ > t.create type=strds temporaltype=absolute
output=precipitation_daily title="Daily precipitation" description="Test
dataset with daily precipitation"
ERROR: Unable to receiving temporal database metadata.
Current temporal database info:
DBMI interface:..... sqlite3
Temporal database:..
/home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db

GRASS 7.0.svn (ll_wgs84):~ > t.register -i type=rast
input=precipitation_daily file=map_list.txt start=2012-08-20 increment="1
days"
ERROR: Unable to receiving temporal database metadata.
Current temporal database info:
DBMI interface:..... sqlite3
Temporal database:..
/home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db

GRASS 7.0.svn (ll_wgs84):~ > t.info type=strds input=precipitation_daily
ERROR: Unable to receiving temporal database metadata.
Current temporal database info:
DBMI interface:..... sqlite3
Temporal database:..
/home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db

I've noticed there are 2 slashes in
"/home/veroandreo/grassdata//ll_wgs84/PERMANENT/tgis/sqlite.db" --> tried
changing that by defining it with t.connect, but when i run the example
gain, I got the same messages as before...

What am I doing wrong? or what am I lacking here??? Would you please help
me???

THANKS A LOT IN ADVANCE!
And sorry for making (surely) a very silly question :stuck_out_tongue:

Vero

[0] http://grass.osgeo.org/grass70/manuals/keywords.html

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