I am experimenting in the use of GIS for mapping ocean currents. We need
knowledge of currents because a lot of our equipment is towed in the
ocean and it`s position is critical in proper sub sea imaging.I have a set of data with x & y and several attributes related to currents
for each position in other words:
12345.00|87654.00|First att. Second att. Third att. Fourth att., etc.
23456.00|98765.00|First att. Second att. Third att. Fouth att., etcI have a predefined grid which is divided into cells (rows & columns).
What I want to do is to assign the attribute values to cells of the
predefined grid. For each attribute I will create a single map surface.
The x and y's of the attribute data will determine which cell gets the value.
The x and y`s provided may not be exactly a 'cell' center but I expect
the GIS to assign the attribute value(s) to the cell with a coordinate center
closest to the x & y of the attribute.
Am I missing something in GRASS. Is this easily done? Is it done at all?
My biggest problem is getting started, in other words loading the data.
I am using simple ascii files as described above.
I have taken gdbase (from Berkeley) and tried to work with s.gdbase.
I'm not getting anywhere.
Can somebody help?
Lastly hints on combining time and GIS would be of interest. The ocean
current data I am using is time tagged and it will be of interest to
examine data in both the time and space domains.
Thank you in advance,
Peter Canter
Section Manager, Engineering Navigation
Geco-Prakla
Oslo, Norway
canter@oslo.sgp.slb.com
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