ODC EP 011 Enhance hyperspectral support

Introduction

Use-cases

Access pattern - spectra, time-series, spatial Spatio-temporal ranges - Resampling and projection - spectral (including convolving bands to produce "red like landsat"), spatial (temporal?) Satellite data to use in this EP:

• EMIT
• EnMAP
• Prisma
• DESIS

Hyperspectral analytics libraries

• spectral
• Three CSIRO ones for Water, Minerals and Agriculture

Storage Formats

• COGS
• Netcdf4 & HDF5
• Zarr

Metadata

• eo3
• STAC HSI

Proposed HS extensions Can we reduce repetition in the metadata representation?

Xarray representation

• wavelength as Dimension
• wavelength as Data Variables

Dask Task Graph

• chunking considerations
• task graph considerations Can the user parameterise how much work (that could otherwise be parallel) should be done with in Task to assist in managing task count? Can Task construction be optimized automatically?

Proposed by

• Robert Woodcock

Dependencies

• odc-geo
• eo3 refactor
• datacube-zarr
• datacube-core

References

• https://github.com/stac-extensions/hsi - STAC HSI extension
• hyperspectral-notebooks repo demonstrating ODC-like examples of working with hyperspectral data.