Re: [GRASS-user] Creating STRDS from scratch

[Rich Shepard]

On Wed, 22 Feb 2017, Rich Shepard wrote:


Well, duh! I thought I ran t.register yesterday, but I did not. I asked
about using the '-i' option and then called it a workday. Sigh. Will run
t.register now and see if the STRDS is properly filled.


  Results are much better when the module is run:

t.info type=strds input=rainfall
 +--- Space Time Raster Dataset ---+
 |
 +--- Basic information ---+
 | Id:  rainfall@topography
 | Name: .. rainfall
 | Mapset:  topography
 | Creator: ... rshepard
 | Temporal type: . absolute
 | Creation time: . 2017-02-21 13:43:48.931376
 | Modification time:.. 2017-02-22 08:24:00.223559
 | Semantic type:.. mean
 +--- Absolute time +
 | Start time:. 2013-11-15 00:00:00
 | End time:... 2013-12-09 00:00:00
 | Granularity: 1 day
 | Temporal type of maps:.. interval
 +-- Spatial extent +
 | North:.. 175430.809409
 | South:.. 174426.610036
 | East:..  2296197.40538
 | West:... 2295620.05945
 | Top: 0.0
 | Bottom:. 0.0
 +-- Metadata information --+
 | Raster register table:..
raster_map_register_7137018d99ba4dd29f94b620b8ca406e
 | North-South resolution min:. 1.000199
 | North-South resolution max:. 1.000199
 | East-west resolution min:... 1.0006
 | East-west resolution max:... 1.0006
 | Minimum value min:.. 0.0
 | Minimum value max:.. 1.12
 | Maximum value min:.. 0.0
 | Maximum value max:.. 1.12
 | Aggregation type:... None
 | Number of registered maps:.. 24
 |
 | Title:
 | Rainfall Rates
 | Description:
 | Daily rainfall rates in mm/hr.
 | Command history:
 | # 2017-02-21 13:43:49
 | t.create type="strds" temporaltype="absolute"
 | output="rainfall" title="Rainfall Rates"
 | description="Daily rainfall rates in mm/hr."
 | # 2017-02-22 08:24:00
 | t.register -i input="rainfall"
 |
 
maps="rainfall_20131115,rainfall_20131116,rainfall_20131117,rainfall_20131118,rainfall_20131120,rainfall_20131121,rainfall_20131122,rainfall_20131123,rainfall_20131124,rainfall_20131125,rainfall_20131126,rainfall_20131127,rainfall_20131128,rainfall_20131129,rainfall_20131130,rainfall_20131201,rainfall_20131202,rainfall_20131203,rainfall_20131204,rainfall_20131205,rainfall_20131206,rainfall_20131207,rainfall_20131208,rainfall_20131209"
 | start="2013-11-15" increment="1 days"

  Yes, all maps are listed but truncated here.

Thanks, Soeren and Laurent,

Rich
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Re: [GRASS-user] Creating STRDS from scratch

[Rich Shepard]

On Wed, 22 Feb 2017, Laurent C. wrote:


As Sören said, it is an empty STRDS.
For use with Itzï, the model checks the topology of the data before
running the simulation. It will run only if:
- The STRDS covers the simulation from start to end,
- does not have any gap,
- have valid topology


  Well, duh! I thought I ran t.register yesterday, but I did not. I asked
about using the '-i' option and then called it a workday. Sigh. Will run
t.register now and see if the STRDS is properly filled.

Thanks,

Rich
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Re: [GRASS-user] Creating STRDS from scratch

[Laurent C.]

2017-02-22 9:28 GMT-06:00 Rich Shepard :
> On Tue, 21 Feb 2017, Laurent C. wrote:
>
>> In your case, it seems you want to have uniform rainfall. So you can set
>> the region, and then use mapcalc like so: r.mapcalc
>> exp='rainfall_2013115=0.1' And doing the same for each day.
>
>
>   The region is correctly set. I assume that what t.info reports is correct
> as the rainfall input to Itzi and would like confirmation or corrections:
>

As Sören said, it is an empty STRDS.
For use with Itzï, the model checks the topology of the data before
running the simulation. It will run only if:
- The STRDS covers the simulation from start to end,
- does not have any gap,
- have valid topology

Regards,
Laurent

> t.info type=strds input=rainfall
>  +--- Space Time Raster Dataset ---+
>  |
>  |
>  +--- Basic information ---+
>  | Id:  rainfall@topography
>  | Name: .. rainfall
>  | Mapset:  topography
>  | Creator: ... rshepard
>  | Temporal type: . absolute
>  | Creation time: . 2017-02-21 13:43:48.931376
>  | Modification time:.. 2017-02-21 13:43:48.931422
>  | Semantic type:.. mean
>  +--- Absolute time ---+
>  | Start time:. None
>  | End time:... None
>  | Granularity: None
>  | Temporal type of maps:.. None
>  +--- Spatial extent --+
>  | North:.. None
>  | South:.. None
>  | East:..  None
>  | West:... None
>  | Top: None
>  | Bottom:. None
>  +-- Metadata information -+
>  | Raster register table:..
> raster_map_register_7137018d99ba4dd29f94b620b8ca406e
>  | North-South resolution min:. None
>  | North-South resolution max:. None
>  | East-west resolution min:... None
>  | East-west resolution max:... None
>  | Minimum value min:.. None
>  | Minimum value max:.. None
>  | Maximum value min:.. None
>  | Maximum value max:.. None
>  | Aggregation type:... None
>  | Number of registered maps:.. None
>  |
>  | Title:
>  | Rainfall Rates
>  | Description:
>  | Daily rainfall rates in mm/hr.
>  | Command history:
>  | # 2017-02-21 13:43:49
>  | t.create type="strds" temporaltype="absolute"
>  | output="rainfall" title="Rainfall Rates"
>  | description="Daily rainfall rates in mm/hr."
>
>
> Rich
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Re: [GRASS-user] Creating STRDS from scratch

[Sören Gebbert]

This is a good looking empty STRDS. All metadata that is set to "None"
will be updated if maps are added to the STRDS with t.register.

2017-02-22 16:28 GMT+01:00 Rich Shepard :
> On Tue, 21 Feb 2017, Laurent C. wrote:
>
>> In your case, it seems you want to have uniform rainfall. So you can set
>> the region, and then use mapcalc like so: r.mapcalc
>> exp='rainfall_2013115=0.1' And doing the same for each day.
>
>
>   The region is correctly set. I assume that what t.info reports is correct
> as the rainfall input to Itzi and would like confirmation or corrections:
>
> t.info type=strds input=rainfall
>  +--- Space Time Raster Dataset ---+
>  |
>  |
>  +--- Basic information ---+
>  | Id:  rainfall@topography
>  | Name: .. rainfall
>  | Mapset:  topography
>  | Creator: ... rshepard
>  | Temporal type: . absolute
>  | Creation time: . 2017-02-21 13:43:48.931376
>  | Modification time:.. 2017-02-21 13:43:48.931422
>  | Semantic type:.. mean
>  +--- Absolute time ---+
>  | Start time:. None
>  | End time:... None
>  | Granularity: None
>  | Temporal type of maps:.. None
>  +--- Spatial extent --+
>  | North:.. None
>  | South:.. None
>  | East:..  None
>  | West:... None
>  | Top: None
>  | Bottom:. None
>  +-- Metadata information -+
>  | Raster register table:..
> raster_map_register_7137018d99ba4dd29f94b620b8ca406e
>  | North-South resolution min:. None
>  | North-South resolution max:. None
>  | East-west resolution min:... None
>  | East-west resolution max:... None
>  | Minimum value min:.. None
>  | Minimum value max:.. None
>  | Maximum value min:.. None
>  | Maximum value max:.. None
>  | Aggregation type:... None
>  | Number of registered maps:.. None
>  |
>  | Title:
>  | Rainfall Rates
>  | Description:
>  | Daily rainfall rates in mm/hr.
>  | Command history:
>  | # 2017-02-21 13:43:49
>  | t.create type="strds" temporaltype="absolute"
>  | output="rainfall" title="Rainfall Rates"
>  | description="Daily rainfall rates in mm/hr."
>
>
> Rich
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Re: [GRASS-user] Creating STRDS from scratch

[Rich Shepard]

On Tue, 21 Feb 2017, Laurent C. wrote:


In your case, it seems you want to have uniform rainfall. So you can set
the region, and then use mapcalc like so: r.mapcalc 
exp='rainfall_2013115=0.1' And doing the same for each day.


  The region is correctly set. I assume that what t.info reports is correct
as the rainfall input to Itzi and would like confirmation or corrections:

t.info type=strds input=rainfall
 +--- Space Time Raster Dataset ---+
 |
 |
 +--- Basic information ---+
 | Id:  rainfall@topography
 | Name: .. rainfall
 | Mapset:  topography
 | Creator: ... rshepard
 | Temporal type: . absolute
 | Creation time: . 2017-02-21 13:43:48.931376
 | Modification time:.. 2017-02-21 13:43:48.931422
 | Semantic type:.. mean
 +--- Absolute time ---+
 | Start time:. None
 | End time:... None
 | Granularity: None
 | Temporal type of maps:.. None
 +--- Spatial extent --+
 | North:.. None
 | South:.. None
 | East:..  None
 | West:... None
 | Top: None
 | Bottom:. None
 +-- Metadata information -+
 | Raster register table:..
raster_map_register_7137018d99ba4dd29f94b620b8ca406e
 | North-South resolution min:. None
 | North-South resolution max:. None
 | East-west resolution min:... None
 | East-west resolution max:... None
 | Minimum value min:.. None
 | Minimum value max:.. None
 | Maximum value min:.. None
 | Maximum value max:.. None
 | Aggregation type:... None
 | Number of registered maps:.. None
 |
 | Title:
 | Rainfall Rates
 | Description:
 | Daily rainfall rates in mm/hr.
 | Command history:
 | # 2017-02-21 13:43:49
 | t.create type="strds" temporaltype="absolute"
 | output="rainfall" title="Rainfall Rates"
 | description="Daily rainfall rates in mm/hr."

Rich
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Re: [GRASS-user] Creating STRDS from scratch

[Rich Shepard]

On Wed, 22 Feb 2017, Sören Gebbert wrote:


If your data is accumulated for a time period (a day, ...), then you
have interval time.
If your data represent a value that is valid for a specific time
period (daily mean), you have interval time.
If your data represents a specific state at a point of time that has a
smaller period as a second, then you have time instances.


Sören,

  Thank you for clarifying. We all use terms for which we have specific
definitions while others have their own definitions that are different.
That's why I want to be sure we're both using the same definition.


The next thing to consider is, what you want to do with the data. If you
want to compute interactions with other time series, then it makes sense
to use time intervals to compute temporal overlapping and intersection.


  These data will be part of the input to Itzi models of flat land surface
hydrology. They are the only variable contributing to water depth by time
and place.

Very much appreciated,

Rich
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Re: [GRASS-user] Creating STRDS from scratch

[Sören Gebbert]

If your data is accumulated for a time period (a day, ...), then you
have interval time.
If your data represent a value that is valid for a specific time
period (daily mean), you have interval time.
If your data represents a specific state at a point of time that has a
smaller period as a second, then you have time instances.

The next thing to consider is, what you want to do with the data. If
you want to compute interactions with other time series, then it makes
sense to use time intervals to compute temporal overlapping and
intersection.

Best regards
Soeren

2017-02-22 0:14 GMT+01:00 Rich Shepard :
> On Tue, 21 Feb 2017, Veronica Andreo wrote:
>
>> If your maps represent intervals, then yes, it is correct to use -i. What
>> -i does is create intervals of the given increment (1 day) starting from
>> the start date that you pass (2013-11-15).
>
>
> Vero,
>
>   Since this is the first time I've dealt with temporal datasets in GRASS I
> need to understand what more experienced analysts take for granted. In this
> case I'm trying to understand whether my data do represent intervals.
>
>   The data represent the hourly average rainfall rate calculated by dividing
> the daily total rainfall amount by 24. Therefore, for each day I have a
> single value, and the STRDS input file consists of that value for each date
> in sequence for a total of 25 days. The last day in the file is a filler to
> ensure the last meaningful day is included.
>
>   So I assume that since I have raster maps for each of 25 sequential dates
> they represent intervals. And, if I were to have a set of files with each
> one on a different day, but not sequential, then those maps would not
> represent intervals. Are these assumption correct?
>
> Thanks,
>
>
> Rich
>
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Re: [GRASS-user] Creating STRDS from scratch

[Rich Shepard]

On Tue, 21 Feb 2017, Veronica Andreo wrote:


If your maps represent intervals, then yes, it is correct to use -i. What
-i does is create intervals of the given increment (1 day) starting from
the start date that you pass (2013-11-15).


Vero,

  Since this is the first time I've dealt with temporal datasets in GRASS I
need to understand what more experienced analysts take for granted. In this
case I'm trying to understand whether my data do represent intervals.

  The data represent the hourly average rainfall rate calculated by dividing
the daily total rainfall amount by 24. Therefore, for each day I have a
single value, and the STRDS input file consists of that value for each date
in sequence for a total of 25 days. The last day in the file is a filler to
ensure the last meaningful day is included.

  So I assume that since I have raster maps for each of 25 sequential dates
they represent intervals. And, if I were to have a set of files with each
one on a different day, but not sequential, then those maps would not
represent intervals. Are these assumption correct?

Thanks,

Rich

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Re: [GRASS-user] Creating STRDS from scratch

[Veronica Andreo]

Dear Rich,

If your maps represent intervals, then yes, it is correct to use -i. What
-i does is create intervals of the given increment (1 day) starting from
the start date that you pass (2013-11-15).

You can check the results of using -i and not using it, with t.info and
t.rast.list. if you do not use the flag what you get is time instances or
time points (maps with only start time). But again, it all depends on the
data you have.

HTH,
Vero


El 21 feb. 2017 11:05 p. m., "Rich Shepard" 
escribió:

  Having read the temporal data processing/maps registration wiki page I
want to check that I'm using the correct t.register syntax for my data.

  A series of maps exists with names of the format 'rainfall_MMDD'.
While these define the start_time and end_time each file represents one
day's value (as an hourly rate) so I believe that I can use a start_time and
duration description:

t.register -i input=rainfall maps='g.list type=raster pattern=rainfall_*' \
separator=comma start='2013-11-15' increment='1 days'

  Is this correct? Or, should I use:

t.register input=precipitacion maps='g.list type=raster pattern=rainfall_* \
separator=comma start="2013-11-15" increment="1 days"

without the '-i' option?


Rich

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Re: [GRASS-user] Creating STRDS from scratch

[Rich Shepard]

  Having read the temporal data processing/maps registration wiki page I
want to check that I'm using the correct t.register syntax for my data.

  A series of maps exists with names of the format 'rainfall_MMDD'.
While these define the start_time and end_time each file represents one
day's value (as an hourly rate) so I believe that I can use a start_time and
duration description:

t.register -i input=rainfall maps='g.list type=raster pattern=rainfall_*' \
separator=comma start='2013-11-15' increment='1 days'

  Is this correct? Or, should I use:

t.register input=precipitacion maps='g.list type=raster pattern=rainfall_* \
separator=comma start="2013-11-15" increment="1 days"

without the '-i' option?

Rich

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Re: [GRASS-user] Creating STRDS from scratch

[Rich Shepard]

On Tue, 21 Feb 2017, Laurent C. wrote:


I'm not familiar with the 'file' option in r.mapcalc. Maybe removing the
quotes will do?


Laurent,

  Huh! You nailed it: with the expression in a file the quotation marks are
not wanted. That ought to be added to the manual page so naive users like me
learn the syntactical difference.

Thanks,

Rich
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Re: [GRASS-user] Creating STRDS from scratch

[Laurent C.]

Rich,

I'm not familiar with the 'file' option in r.mapcalc. Maybe removing
the quotes will do?

Laurent

2017-02-21 12:31 GMT-06:00 Rich Shepard :
> On Tue, 21 Feb 2017, Laurent C. wrote:
>
>> So you can set the region, and then use mapcalc like so: r.mapcalc
>> exp='rainfall_2013115=0.1' And doing the same for each day.
>
>
> Laurent,
>
>   Syntax error.
>
> File contents:
>
> 'rainfall_20131115 = 0.10'
> 'rainfall_20131116 = 0.32'
> 'rainfall_20131117 = 0.10'
>   ...
> 'rainfall_20131208 = 0.23'
> 'rainfall_20131209 = 0.00'
>
> Command line:
> r.mapcalc file=/full/path/to/data/file/pop_daily_precip.txt
> syntax error, unexpected ';', expecting '='
> Parse error
> ERROR: parse error
>
>   I do not see my error.
>
>
> Rich
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Re: [GRASS-user] Creating STRDS from scratch

[Rich Shepard]

On Tue, 21 Feb 2017, Laurent C. wrote:


So you can set the region, and then use mapcalc like so: r.mapcalc
exp='rainfall_2013115=0.1' And doing the same for each day.


Laurent,

  Syntax error.

File contents:

'rainfall_20131115 = 0.10'
'rainfall_20131116 = 0.32'
'rainfall_20131117 = 0.10'
  ...
'rainfall_20131208 = 0.23'
'rainfall_20131209 = 0.00'

Command line:
r.mapcalc file=/full/path/to/data/file/pop_daily_precip.txt
syntax error, unexpected ';', expecting '='
Parse error
ERROR: parse error

  I do not see my error.

Rich
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Re: [GRASS-user] Creating STRDS from scratch

[Rich Shepard]

On Tue, 21 Feb 2017, Sören Gebbert wrote:


Temporal type can be absolute or relative. The semantic type is not
used for now.
absolute time -> calendar time with an absolute reference like
2017-01-01 12:00:00
relative time -> a second, three years, two minutes ...


  Thanks, Sören.

Rich
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Re: [GRASS-user] Creating STRDS from scratch

[Sören Gebbert]

Hi,

2017-02-21 17:35 GMT+01:00 Rich Shepard :
>   After reading the spatio-temporal introduction and t.create manual page I
> went to the wiki where an example workflow is presented. The example uses
> satellite raster data; my data are 25 days of daily precipitation (total and
> hourly rate) over an approximate 40 ha area. A bare earth LiDAR DEM for this
> area exists.
>
>   Do I make copies of the DEM for each day then replace the elevation with
> either the daily total or the hourly rate for each day?
>
>   For the t.create parameters I know type = strds but have no idea what
> temporaltype or semantictype to specify. (N.B. The manual page example has
> no value for semantictype and that's supposed to be required input.)

Temporal type can be absolute or relative. The semantic type is not
used for now.
absolute time -> calendar time with an absolute reference like
2017-01-01 12:00:00
relative time -> a second, three years, two minutes ...

>
>   Where do I find the information I need to create this temporal database?
>
> Rich
>
>
>
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Re: [GRASS-user] Creating STRDS from scratch

[Rich Shepard]

On Tue, 21 Feb 2017, Laurent C. wrote:


So you can set the region, and then use mapcalc like so: r.mapcalc
exp='rainfall_2013115=0.1' And doing the same for each day. A small script
could be useful to automatize the task.


Laurent,

  I assume this is applied to the bare earth DEM.


When registering the maps, it's better to set an end_time equal to the
start_time of the next map, to cover the whole period.


  So the start_time is 2013-11-15 00:00 and the end_time is 2013-12-09 00:00
even though there's no map for that ending date?

Thanks,

Rich
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Re: [GRASS-user] Creating STRDS from scratch

[Rich Shepard]

On Tue, 21 Feb 2017, Thomas Adams wrote:


... a critical step is to create a text file that looks like this:
PRISM_ppt_4kmM2_1970|1970-01-01 00:00:00|1970-12-31 23:00:00
where the first column is the map name of the imported raster map, ...


Tom,

  Yes, this works when you have existing map files. What I have is this:

2013-11-15  0.10
2013-11-16  0.32
2013-11-17  0.10
 ...
2013-12-08  0.23

  No maps; a list of dates and average precipitation rate in mm/hr.

  Do I create a set of maps, one per day, from the DEM for the area?

Thanks,

Rich
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Re: [GRASS-user] Creating STRDS from scratch

[Thomas Adams]

Rich,

I'm not entirely sure of what you're asking, but following the wiki (which
I did to make this work for me), a critical step is to create a text file
that looks like this:

PRISM_ppt_4kmM2_1970|1970-01-01 00:00:00|1970-12-31 23:00:00
PRISM_ppt_4kmM2_1971|1971-01-01 00:00:00|1971-12-31 23:00:00
PRISM_ppt_4kmM2_1972|1972-01-01 00:00:00|1972-12-31 23:00:00
PRISM_ppt_4kmM2_1973|1973-01-01 00:00:00|1973-12-31 23:00:00
PRISM_ppt_4kmM2_1974|1974-01-01 00:00:00|1974-12-31 23:00:00
PRISM_ppt_4kmM2_1975|1975-01-01 00:00:00|1975-12-31 23:00:00
PRISM_ppt_4kmM2_1976|1976-01-01 00:00:00|1976-12-31 23:00:00
PRISM_ppt_4kmM2_1977|1977-01-01 00:00:00|1977-12-31 23:00:00
PRISM_ppt_4kmM2_1978|1978-01-01 00:00:00|1978-12-31 23:00:00
PRISM_ppt_4kmM2_1979|1979-01-01 00:00:00|1979-12-31 23:00:00
PRISM_ppt_4kmM2_1980|1980-01-01 00:00:00|1980-12-31 23:00:00
PRISM_ppt_4kmM2_1981|1981-01-01 00:00:00|1981-12-31 23:00:00
PRISM_ppt_4kmM2_1982|1982-01-01 00:00:00|1982-12-31 23:00:00
PRISM_ppt_4kmM2_1983|1983-01-01 00:00:00|1983-12-31 23:00:00
PRISM_ppt_4kmM2_1984|1984-01-01 00:00:00|1984-12-31 23:00:00
PRISM_ppt_4kmM2_1985|1985-01-01 00:00:00|1985-12-31 23:00:00
PRISM_ppt_4kmM2_1986|1986-01-01 00:00:00|1986-12-31 23:00:00
PRISM_ppt_4kmM2_1987|1987-01-01 00:00:00|1987-12-31 23:00:00
PRISM_ppt_4kmM2_1988|1988-01-01 00:00:00|1988-12-31 23:00:00
PRISM_ppt_4kmM2_1989|1989-01-01 00:00:00|1989-12-31 23:00:00
*
*
*

where the first column is the map name of the imported raster map, followed
by the start date/time and end date/time --the end time in my case was most
important because the data represents PRISM annual precipitation
accumulations.

Hope this helps

Tom


On Tue, Feb 21, 2017 at 11:35 AM, Rich Shepard 
wrote:

>   After reading the spatio-temporal introduction and t.create manual page I
> went to the wiki where an example workflow is presented. The example uses
> satellite raster data; my data are 25 days of daily precipitation (total
> and
> hourly rate) over an approximate 40 ha area. A bare earth LiDAR DEM for
> this
> area exists.
>
>   Do I make copies of the DEM for each day then replace the elevation with
> either the daily total or the hourly rate for each day?
>
>   For the t.create parameters I know type = strds but have no idea what
> temporaltype or semantictype to specify. (N.B. The manual page example has
> no value for semantictype and that's supposed to be required input.)
>
>   Where do I find the information I need to create this temporal database?
>
> Rich
>
>
>
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Thomas E Adams, III
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