|
| 1 | +--- |
| 2 | +title: GeoZarr |
| 3 | +subtitle: STAC and Zarr Workshop Update (April 2025) |
| 4 | +footer: "Thanks: Brianna Pagán, Christophe Noël, GeoZarr SWG, Zarr refactor WG" |
| 5 | +format: |
| 6 | + revealjs: |
| 7 | + incremental: false |
| 8 | + auto-stretch: false |
| 9 | + theme: solarized |
| 10 | + width: 1600 |
| 11 | + height: 900 |
| 12 | + slideNumber: true |
| 13 | +--- |
| 14 | + |
| 15 | +## Goals {footer=false} |
| 16 | + |
| 17 | +- 📍 Provide a status update on the GeoZarr specification |
| 18 | +- 🧭 Provide entry-points for contributing to GeoZarr development |
| 19 | + |
| 20 | +::: footer |
| 21 | +::: |
| 22 | + |
| 23 | +## What is GeoZarr? |
| 24 | + |
| 25 | +A geospatial extension for the Zarr specification, formalizing metadata expectations. |
| 26 | + |
| 27 | +{fig-alt="GeoZarr repository" fig-align="center" width="60%"} |
| 28 | + |
| 29 | +::: footer |
| 30 | +Read [the spec](https://github.com/zarr-developers/geozarr-spec/)! |
| 31 | +::: |
| 32 | + |
| 33 | +## Some history |
| 34 | + |
| 35 | +{fig-alt="GeoZarr commit activity" fig-align="center" width="95%"} |
| 36 | + |
| 37 | +::: footer |
| 38 | +Figure generated February 2025 |
| 39 | +::: |
| 40 | + |
| 41 | +## Recent activity |
| 42 | + |
| 43 | +Christophe Noël proposes structuring GeoZarr around the Unified Abstract Data Model |
| 44 | + |
| 45 | +{fig-alt="Unified data model presentation" fig-align="center" width="60%"} |
| 46 | + |
| 47 | +::: footer |
| 48 | +See [the GitHub issue](https://github.com/zarr-developers/geozarr-spec/issues/63)! |
| 49 | +::: |
| 50 | + |
| 51 | +## (Very) recent activity |
| 52 | + |
| 53 | +Christophe Noël structures the spec based on the Unified Data Model and Conformance Classes |
| 54 | + |
| 55 | +{fig-alt="Unified data model proposal" fig-align="center" width="60%"} |
| 56 | + |
| 57 | + |
| 58 | +::: footer |
| 59 | +See [the GitHub pull request](https://github.com/zarr-developers/geozarr-spec/pull/64)! |
| 60 | +::: |
| 61 | + |
| 62 | +## Background |
| 63 | + |
| 64 | +Unidata's Common Data Model is an abstract data model that merges the NetCDF, OPenDAP, and HDF5 data models to create a common API for many types of scientific data. |
| 65 | + |
| 66 | +{fig-alt="Common data model" fig-align="center" width="60%"} |
| 67 | + |
| 68 | +::: footer |
| 69 | +Based on [Christophe Noël's ideas](https://github.com/zarr-developers/geozarr-spec/pull/64) |
| 70 | +::: |
| 71 | + |
| 72 | +## Unified Abstract Data Model |
| 73 | + |
| 74 | +A Unified Abstract Data Model would encapsulate traditional models from the modelling (NetCDF, CF) plus models from the earth observation (GeoTIFF, GDAL) communities |
| 75 | + |
| 76 | +{fig-alt="Unified data model proposal" fig-align="center" width="60%"} |
| 77 | + |
| 78 | +::: footer |
| 79 | +Based on [Christophe Noël's ideas](https://github.com/zarr-developers/geozarr-spec/pull/64) |
| 80 | +::: |
| 81 | + |
| 82 | +## N-D functionality with E-O optimizations |
| 83 | + |
| 84 | +{fig-alt="Unified data model proposal" fig-align="center" width="60%"} |
| 85 | + |
| 86 | +::: footer |
| 87 | +::: |
| 88 | + |
| 89 | +## Unified Abstract Data Model Implementation |
| 90 | + |
| 91 | +The VirtualiZarr library could be an implementation of the Unified Abstract Data Model |
| 92 | + |
| 93 | +{fig-alt="Virtualizarr diagram" fig-align="center" width="60%"} |
| 94 | + |
| 95 | +::: footer |
| 96 | +Check out VirtualiZarr on [GitHub](https://github.com/zarr-developers/VirtualiZarr) |
| 97 | +::: |
| 98 | + |
| 99 | +## Upcoming activity |
| 100 | + |
| 101 | +Discussion about conformance classes April 17 |
| 102 | + |
| 103 | +{fig-alt="Calendar event" fig-align="center" width="60%"} |
| 104 | + |
| 105 | +::: footer |
| 106 | +Copy event from the [Pangeo calendar](https://pangeo.io/calendar) |
| 107 | +::: |
| 108 | + |
| 109 | +## Upcoming activity |
| 110 | + |
| 111 | +Monthly GeoZarr meeting on May 7 |
| 112 | + |
| 113 | +{fig-alt="Calendar event" fig-align="center" width="60%"} |
| 114 | + |
| 115 | +::: footer |
| 116 | +Copy event from the [Pangeo calendar](https://pangeo.io/calendar) |
| 117 | +::: |
| 118 | + |
| 119 | +## Upcoming activity |
| 120 | + |
| 121 | +Cloud Native Geospatial conference including a STAC + Zarr presentation by Julia Signell |
| 122 | + |
| 123 | +{fig-alt="Calendar event" fig-align="center" width="60%"} |
| 124 | + |
| 125 | +::: footer |
| 126 | +[Register online](https://conference.cloudnativegeo.org/CNGConference2025#/?lang=en) |
| 127 | +::: |
| 128 | + |
| 129 | +## Upcoming activity |
| 130 | + |
| 131 | +EGU General Assembly including a EOPF Zarr discussion at the Pangeo session |
| 132 | + |
| 133 | +{fig-alt="Calendar event" fig-align="center" width="60%"} |
| 134 | + |
| 135 | +::: footer |
| 136 | +[Attend the session](https://meetingorganizer.copernicus.org/EGU25/session/52079) |
| 137 | +::: |
| 138 | + |
| 139 | +## Shameless plug |
| 140 | + |
| 141 | +Pangeo showcase immediately following the workshop will include a presentation about new Zarr optimizations! |
| 142 | + |
| 143 | +{fig-alt="Calendar event" fig-align="center" width="60%"} |
| 144 | + |
| 145 | +::: footer |
| 146 | +[Attend the showcase](https://discourse.pangeo.io/t/spring-showcase-close-out-lightning-talks-april-16-2025-at-12-pm-et/5047) |
| 147 | +::: |
| 148 | + |
| 149 | +## Thanks! 🚀 |
| 150 | + |
| 151 | +{fig-alt="GitHub source" fig-align="center" width="60%"} |
| 152 | + |
| 153 | +::: footer |
| 154 | +[Slides](https://developmentseed.org/geozarr-examples/slides/2025-04.html#/title-slide) and [source](https://github.com/developmentseed/geozarr-examples) available online |
| 155 | +::: |
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