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@@ -33,6 +33,15 @@ provided temporal granularity. The following shifts will performed:
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<li><em>granularity minutes</em>: will start at the first second of a minute, hence 14-08-2012 01:30:30 will be shifted to 14-08-2012 01:30:00</li>
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</ul>
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+<p>
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+The specification of the temporal relation between the aggregation intervals and the raster map layers
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+is always formulated from the aggregation interval viewpoint. Hence, the relation <em>contains</em>
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+has to be specified to aggregate map layer that are temporally located in an aggregation interval.
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+<p>
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+Parallel processing is supported in case that more than one interval is available for aggregation computation. Internally several
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+<em>r.series</em> modules will be started, depending on the number of specified parallel processes (<em>nprocs</em>)
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+and the number of intervals to aggregate.
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+
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<h2>EXAMPLES</h2>
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In this example, we create 7 raster maps that will be registered in a single space time
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@@ -43,7 +52,8 @@ The space time raster dataset <em>precipitation_daily</em> with daily temporal g
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will be aggregated to weekly precipitation resulting in the output space time raster dataset
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<em>precipitation_weekly</em>. The base name of the new generated raster maps is <em>prec_weekly</em>, the
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granularity is 1 week. The aggregation method is set to <em>sum</em> to accumulate the precipitation values
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-of all raster maps in a week. The sampling option assures that only raster maps that are
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+of all raster maps that are tempoorally <em>contained</em> in a week.
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+The sampling option <em>contains</em> assures that only raster maps that are
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temporally during a week will be considered for computation:
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<div class="code"><pre>
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@@ -64,28 +74,40 @@ t.register -i type=rast input=precipitation_daily \
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t.info type=strds input=precipitation_daily
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+ +-------------------- Space Time Raster Dataset -----------------------------+
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+ | |
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+ +-------------------- Basic information -------------------------------------+
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+ | Id: ........................ precipitation_daily@PERMANENT
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+ | Name: ...................... precipitation_daily
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+ | Mapset: .................... PERMANENT
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+ | Creator: ................... soeren
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+ | Temporal type: ............. absolute
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+ | Creation time: ............. 2014-08-25 11:26:43.088786
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+ | Modification time:.......... 2014-08-25 11:26:43.533237
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+ | Semantic type:.............. mean
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+-------------------- Absolute time -----------------------------------------+
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- | Start time:................. 2012-09-03 00:00:00
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- | End time:................... 2012-09-10 00:00:00
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+ | Start time:................. 2012-08-20 00:00:00
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+ | End time:................... 2012-08-27 00:00:00
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| Granularity:................ 1 day
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| Temporal type of maps:...... interval
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+-------------------- Spatial extent ----------------------------------------+
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| North:...................... 80.0
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- | South:...................... -1.0
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- | East:.. .................... 120.5
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- | West:....................... -40.5
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+ | South:...................... 0.0
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+ | East:.. .................... 120.0
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+ | West:....................... 0.0
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| Top:........................ 0.0
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| Bottom:..................... 0.0
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+-------------------- Metadata information ----------------------------------+
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- | Raster register table:...... precipitation_daily_test_raster_register
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- | North-South resolution min:. 1.0
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- | North-South resolution max:. 1.0
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- | East-west resolution min:... 1.0
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- | East-west resolution max:... 1.0
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+ | Raster register table:...... raster_map_register_68033ba1bca64b33a49a3b356dcfaf9b
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+ | North-South resolution min:. 10.0
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+ | North-South resolution max:. 10.0
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+ | East-west resolution min:... 10.0
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+ | East-west resolution max:... 10.0
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| Minimum value min:.......... 1.0
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| Minimum value max:.......... 1.0
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| Maximum value min:.......... 1.0
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| Maximum value max:.......... 1.0
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+ | Aggregation type:........... None
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| Number of registered maps:.. 7
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| Title:
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@@ -93,11 +115,11 @@ t.info type=strds input=precipitation_daily
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| Description:
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| Test dataset with daily precipitation
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| Command history:
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- | # 2013-07-13 13:10:46
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+ | # 2014-08-25 11:26:43
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| t.create type="strds" temporaltype="absolute"
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| output="precipitation_daily" title="Daily precipitation"
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| description="Test dataset with daily precipitation"
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- | # 2013-07-13 13:10:47
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+ | # 2014-08-25 11:26:43
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| t.register -i type="rast" input="precipitation_daily"
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| file="map_list.txt" start="2012-08-20" increment="1 days"
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@@ -106,7 +128,7 @@ t.info type=strds input=precipitation_daily
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t.rast.aggregate input=precipitation_daily \
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output=precipitation_weekly \
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base=prec_weekly granularity="1 weeks" \
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- method=sum sampling=during
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+ method=sum sampling=contains
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t.support input=precipitation_weekly \
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title="Weekly precipitation" \
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@@ -117,35 +139,37 @@ t.info type=strds input=precipitation_weekly
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+-------------------- Space Time Raster Dataset -----------------------------+
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| |
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+-------------------- Basic information -------------------------------------+
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- | Id: ........................ precipitation_weekly@test
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+ | Id: ........................ precipitation_weekly@PERMANENT
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| Name: ...................... precipitation_weekly
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- | Mapset: .................... test
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+ | Mapset: .................... PERMANENT
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| Creator: ................... soeren
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- | Creation time: ............. 2013-07-13 13:11:23.286982
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| Temporal type: ............. absolute
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+ | Creation time: ............. 2014-08-25 11:33:25.253525
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+ | Modification time:.......... 2014-08-25 11:33:31.015648
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| Semantic type:.............. mean
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+-------------------- Absolute time -----------------------------------------+
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- | Start time:................. 2012-09-03 00:00:00
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- | End time:................... 2012-09-10 00:00:00
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+ | Start time:................. 2012-08-20 00:00:00
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+ | End time:................... 2012-08-27 00:00:00
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| Granularity:................ 7 days
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| Temporal type of maps:...... interval
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+-------------------- Spatial extent ----------------------------------------+
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| North:...................... 80.0
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- | South:...................... -1.0
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- | East:.. .................... 120.5
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- | West:....................... -40.5
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+ | South:...................... 0.0
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+ | East:.. .................... 120.0
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+ | West:....................... 0.0
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| Top:........................ 0.0
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| Bottom:..................... 0.0
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+-------------------- Metadata information ----------------------------------+
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- | Raster register table:...... precipitation_weekly_test_raster_register
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- | North-South resolution min:. 1.0
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- | North-South resolution max:. 1.0
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- | East-west resolution min:... 1.0
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- | East-west resolution max:... 1.0
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+ | Raster register table:...... raster_map_register_ea1008db0c374501a340f49e46ab24af
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+ | North-South resolution min:. 10.0
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+ | North-South resolution max:. 10.0
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+ | East-west resolution min:... 10.0
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+ | East-west resolution max:... 10.0
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| Minimum value min:.......... 7.0
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| Minimum value max:.......... 7.0
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| Maximum value min:.......... 7.0
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| Maximum value max:.......... 7.0
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+ | Aggregation type:........... sum
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| Number of registered maps:.. 1
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| Title:
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@@ -153,11 +177,11 @@ t.info type=strds input=precipitation_weekly
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| Description:
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| Aggregated precipitation dataset with weekly resolution
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| Command history:
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- | # 2013-07-13 13:11:23
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+ | # 2014-08-25 11:33:25
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| t.rast.aggregate input="precipitation_daily"
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| output="precipitation_weekly" base="prec_weekly" granularity="1 weeks"
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- | method="sum" sampling="during"
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- | # 2013-07-13 13:11:29
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+ | method="sum" sampling="contains"
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+ | # 2014-08-25 11:33:31
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| t.support input="precipitation_weekly"
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| title="Weekly precipitation"
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| description="Aggregated precipitation dataset with weekly resolution"
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