Data as a grid

From geometries to rasters

Some data are not linked to geometries

Some data are linked to cells of a grid

Grid can be represented as geometries

But it is inefficient!

Welcome N-D arrays

N-D arrays in xarray

Efficient storage

Efficient processing (grids are predictable!)

Efficient scaling

Efficient data structure for N-dimensional data

Directly reflect the way some data is captured

Grids in social geography

Usually large (global) scale data

Population grids

Built-up area

Built-up volume

Typology of urbanisation

Auxiliary data

Land cover

Satellite imagery

Temperature

Weather

import xarray