The result is a new space time vector dataset that contains a single (new) vector map which links to as many time-stamped attribute tables as raster map layers are present in the input space time raster dataset. Hence, for each time step in the space time raster dataset a new attribute table is created. The GRASS GIS Temporal Framework allows to time stamp attribute tables that can be linked to a single vector map layer.
The module v.what.rast is used internally for sampling the time stamped raster map layers. All sampled values of a single time stamped raster map layer are written into a new time stamped attribute table.
Use t.vect.db.select to print attribute values of the space time vector dataset to stdout.
t.vect.observe.strds input=precip_30ynormals_3d strds=tempmean_monthly \ output=precip_stations vect=precip_stations_monthly \ columns=month t.info precip_stations type=stvds +-------------------- Space Time Vector Dataset -----------------------------+ | | +-------------------- Basic information -------------------------------------+ | Id: ........................ precip_stations@climate_2009_2012 | Name: ...................... precip_stations | Mapset: .................... climate_2009_2012 | Creator: ................... lucadelu | Temporal type: ............. absolute | Creation time: ............. 2014-12-02 00:42:39.187615 | Modification time:.......... 2014-12-02 00:42:55.215169 | Semantic type:.............. mean +-------------------- Absolute time -----------------------------------------+ | Start time:................. 2009-01-01 00:00:00 | End time:................... 2013-01-01 00:00:00 | Granularity:................ 1 month | Temporal type of maps:...... interval +-------------------- Spatial extent ----------------------------------------+ | North:...................... 306221.830194 | South:...................... 27606.895351 | East:.. .................... 917004.829165 | West:....................... 151768.568246 | Top:........................ 1615.44 | Bottom:..................... 2.4384 +-------------------- Metadata information ----------------------------------+ | Vector register table:...... vector_map_register_be074525097c4088997c9a1979f17065 | Number of points ........... 6664 | Number of lines ............ 0 | Number of boundaries ....... 0 | Number of centroids ........ 0 | Number of faces ............ 0 | Number of kernels .......... 0 | Number of primitives ....... 6664 | Number of nodes ............ 0 | Number of areas ............ 0 | Number of islands .......... 0 | Number of holes ............ 0 | Number of volumes .......... 0 | Number of registered maps:.. 49 | | Title: | Observaion of space time raster dataset(s) tempmean_monthly | Description: | Observation of space time raster dataset(s) tempmean_monthly with vector map precip_30ynormals_3d | Command history: | # 2014-12-02 00:42:39 | t.vect.observe.strds input="precip_30ynormals_3d" | strds="tempmean_monthly" output="precip_stations" | vect="precip_stations_monthly" columns="month" | +----------------------------------------------------------------------------+ v.info precip_stations_monthly +----------------------------------------------------------------------------+ | Name: precip_stations_monthly | | Mapset: climate_2009_2012 | | Project: nc_spm_temporal_workshop | | Database: /grassdata | | Title: North Carolina 30 year precipitation normals (3D) | | Map scale: 1:1 | | Name of creator: neteler | | Organization: | | Source date: Wed May 9 14:32:39 2007 | | Timestamp (first layer): none | |----------------------------------------------------------------------------| | Map format: native | |----------------------------------------------------------------------------| | Type of map: vector (level: 2) | | | | Number of points: 136 Number of centroids: 0 | | Number of lines: 0 Number of boundaries: 0 | | Number of areas: 0 Number of islands: 0 | | Number of faces: 0 Number of kernels: 0 | | Number of volumes: 0 Number of holes: 0 | | | | Map is 3D: Yes | | Number of dblinks: 49 | | | | Projection: Lambert Conformal Conic | | | | N: 306221.830194 S: 27606.895351 | | E: 917004.829165 W: 151768.568246 | | B: 2.4384 T: 1615.44 | | | | Digitization threshold: 0 | | Comment: | | | +----------------------------------------------------------------------------+
Available at: t.vect.observe.strds source code (history)
Latest change: Friday May 03 14:49:35 2024 in commit: 763fa05e332664d1b5f883b4a26a81decf7757b3
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