Re: v.what.strds: timestamp column
Stefan Blumentrath <[email protected]>
| Newsgroups | gmane.comp.gis.grass.devel |
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| Message-ID | <VI1PR02MB5038B564BE6C0E2AB8DB28209E9C0@VI1PR02MB5038.eurprd02.prod.outlook.com> |
Hei Martin, What about: https://grass.osgeo.org/grass78/manuals/addons/v.what.strds.timestamp.html Written for the IRSAE course at Studenterhytta (Oslo, Norway), in order to e.g. spatio-temporal match temperature timeseries and GPS-tracking data. Cheers, Stefan From: grass-dev <[email protected]> On Behalf Of Veronica Andreo Sent: mandag 15. juni 2020 22:50 To: Martin Landa <[email protected]> Cc: GRASS developers list <[email protected]> Subject: Re: [GRASS-dev] v.what.strds: timestamp column Hi Martin, Afaik, v.what.strds is just a wrapper for v.what.rast for all the maps in the raster time series. It does not consider the column time in the vector. Then there's t.vect.what.strds that uses a space-time vector data set (STVDS) to query a STRDS, but in my opinion to create a STVDS is a bit of a hassle (one vector map per date). The only module that I'm aware of that takes a vector with dates to query a STRDS is Luca's add-on t.rast.what.aggr (https://grass.osgeo.org/grass78/manuals/addons/t.rast.what.aggr.html), but it's aim is to get aggregates before or after the dates provided in the vector. HTH, Vero El lun., 15 jun. 2020 17:20, Martin Landa <[email protected]<mailto:[email protected]>> escribió: Hi, I am playing with `v.what.strds` in order to get space-time-related nearest raster value information from strds based on given timestamp stored in attribute table. Input: vector map with timestamp column, eg: cat|time 6|2020-01-08 03:00:00 Goal: get a single raster value from strds based on timestamp. cat|time|value 6|2020-01-08 03:00:00|253 Instead of that v.what.strds returns a new column for each raster map registered in strds. cat|time|map_1,map_2,map_3 6|2020-01-08 03:00:00||253| Is there any other tool which could do the job or should I modify v.what.strds in order to solve this task? Eg. v.what.strds time_column=time ... Thanks for in advance, Martin -- Martin Landa http://geo.fsv.cvut.cz/gwiki/Landa http://gismentors.cz/mentors/landa _______________________________________________ grass-dev mailing list [email protected]<mailto:[email protected]> https://lists.osgeo.org/mailman/listinfo/grass-dev _______________________________________________ grass-dev mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/grass-dev