Hello Rich, The concept of time series in GRASS GIS is based on a snapshot approach, i.e., each map represents a specific date or time interval. For the vector type case, you can either split each date as a different vector map or (if, as in your case, the coordinates are always the same) put each date in a different layer of the same vector map.
To create a time series of vector maps, you would then, need to use t.* modules, esp. t.create [0] and t.register [1]. You can check the temporal intro manual page [2] for a general description of the temporal framework and the temporal data processing wiki [3] for more (raster oriented, sorry) examples. HTH, Vero [0] https://grass.osgeo.org/grass75/manuals/t.create.html [1] https://grass.osgeo.org/grass75/manuals/t.register.html [2] https://grass.osgeo.org/grass75/manuals/temporalintro.html [3] https://grasswiki.osgeo.org/wiki/Temporal_data_processing El mié., 11 jul. 2018 a las 20:57, Rich Shepard (<[email protected]>) escribió: > I have a point map of weather stations and records since about 2005. The > attribute table has 113,570 rows; each row has the station name and date as > the primary key and there are 20 attribute columns. The reason I imported > all 20 attributes is to learn how to turn this map into a spatio-temporal > vector. The data have lon-lat geographic coordinates and were reprojected > to > the project location's SRS. > > I'm trying to obtain attribute data for the two stations within the > project area by clicking on the point using the 'query item' button on the > map display window. > > One worked fine; the other shows a clock and doesn't produce a result > even > after a 5 minute wait. > > Is this an unusual request of grass on a 32-bit workstation with 4G RAM? > > Rich > > > > > > > _______________________________________________ > grass-user mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/grass-user
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