[GRASS-user] Linking multidimensional data to a single point

Andy Wickert andrewwickert at gmail.com
Sun Mar 15 07:56:17 PDT 2015


Dear GRASS users,

I have a question regarding attaching data where there may me more than one
value per category to a single GIS point. Here are a couple of examples;
the first may already be taken care of by the temporal GIS component of
GRASS, but the second would not be.


EXAMPLE 1:

(Possible answer = temporal GIS)

I want to present a time series of stream gage data. I would like a data
table to have:

time     water_discharge_m3_s     sediment_discharge_m3_s

And to have an entire time series of values for a given grass vector
category (i.e. vector point, in this case).


EXAMPLE 2:

I have a series of data on sediment composition at a river site. For each
point, I want to have a 2D data table with multiple values for:

grain_size     lithology


Is there any way to include these sorts of multi-dimensional relational
data in GRASS? (I say multi-dimensional because I can imagine a standard
GRASS table containing links to the full data series, for example.)

Thanks for the help!

Andy Wickert
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