[gdal-dev] Multidimensional raster support in GDAL

Edzer Pebesma edzer.pebesma at uni-muenster.de
Wed Nov 1 05:12:24 PDT 2017

On 10/26/2017 07:25 PM, Even Rouault wrote:
>> More in general, we have multidimensional arrays where horizontal space
>> is not an x y image (GDAL raster band) but for instance a sequence of
>> feature geometries (e.g., in situ sensor data, or demographic data by
>> administrative region, time, and age class).
> I didn't grasp what you meant there. This doesn't sound like gridded
> data, does it ? Can you point to such datasets ?

Not gridded in space, but gridded in spacetime. Examples would be, for
point geometries the EEA air quality database [1], where static station
properties come in one file, and measured air quality measurements (time
series) come in other files, for many parameters; an example where
geometries are regions would be any socio-economic data; concrete
example [2] for each county you'd have a time series of population
counts by age class (2-dimensional array for each county).

[2] https://www.census.gov/data/tables/2016/demo/popest/counties-total.html

Also look for OLAP cube; the concept is quite old, and not restricted to
spatially gridded data. But I'm happy to restrict the discussion here
(first) to spatially gridded data.

Edzer Pebesma
Institute for Geoinformatics
Heisenbergstrasse 2, 48151 Muenster, Germany
Phone: +49 251 8333081

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