STAC Overflow: Map Floodwater from Radar Imagery Hosted By Microsoft AI for Earth
Help Microsoft AI for Earth and Cloud to Street detect floodwater through cloud coverage using Sentinel-1 synthetic-aperture radar (SAR) imagery. Accurate flood mapping can save lives by strengthening early warning systems and directing emergency relief.
No. of Entries
Moscow Hares1st Place Team
The Planetary Computer catalogs the datasets it hosts using SpatioTemporal Asset Catalog (STAC). STAC is a standardized specification for organizing geospatial assets and metadata, making it easy to search for data that match spatial, temporal, or other criteria.
There are three primary components that together make up the STAC specification.
An Item represents a single spatiotemporal asset, or a unit of data and metadata that contains information about the Earth captured at a certain space and time. Examples include GeoJSONs referencing imagery, SAR, data cubes, or full motion videos. Properties of these Items may include spatial extent, temporal extent, band descriptions, label types, or other information like citation examples.
A Catalog provides links to Items or to other Catalogs. It can be thought of like a container, similar to a folder in a file structure. In a nested Catalog structure, its root is simply the top-level Catalog without a parent.
Finally, a Collection shares most fields with a Catalog, but has a number of additional fields like license, extent, providers, keywords, and summaries. Collections are used like Catalogs to provide structure to files, but generally consist of a set of assets that share higher level metadata (e.g. images from the same sensor).
Planetary Computer STAC API
Microsoft AI provides a STAC API that can be used to search for datasets hosted on the Planetary Computer. A STAC API is the dynamic version of a STAC. It returns a STAC Catalog, Collection, Item or STAC API ItemCollection. Catalog and Collection objects are JSONs, while Item and ItemCollection objects are GeoJSON-compliant entities. These files include spatial and temporal information about the 'child' and 'parent' objects they reference, enabling you to easily traverse the file tree.
Using the PySTAC library created by Azavea, you can load, traverse, and access data within these STACs programmatically. This quickstart guide demonstrates how to search for data using the STAC API with PySTAC. For additional resources on PySTAC, check out the intro to PySTAC blog post, documentation, and tutorials.
For this challenge, supplementary data on elevation from the NASA Digital Elevation Model (NASADEM) and global surface water from the European Commission's Joint Research Centre (JRC) are available for use to help your model to better detect floodwater. These datasets can be access through the Collections
jrc-gsw available from the Planetary Computer STAC API.
The Microsoft AI for Earth team has prepared a great in-depth starter notebook on using the Planetary Computer STAC API with PySTAC. Check out the resources available for this challenge in the Planetary Computer Examples repository to get started.
STAC Overflow: Map Floodwater from Radar Imagery: Rules and Terms of Data Use
DrivenData Competition Rules
One account per participant
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Private sharing of code
Privately sharing code or data outside of teams is not permitted.
Winner License Type: Open Source License
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Documentation for winning solutions
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External data is not allowed unless otherwise noted explicitly on these competition pages. Participants agree to make no attempt to use additional data or data sources not provided on these competition pages.
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Data use and code sharing
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Disclaimer of Warranties
You understand that we cannot and do not guarantee or warrant that the Data or other files available for downloading from the internet or the Competition Website will be free of viruses or other destructive code. You are responsible for implementing sufficient procedures and checkpoints to satisfy your particular requirements for anti-virus protection and accuracy of data input and output, and for maintaining a means external to our site for any reconstruction of any lost data. RELEASED PARTIES WILL NOT BE LIABLE FOR ANY LOSS OR DAMAGE CAUSED BY A DISTRIBUTED DENIAL-OF-SERVICE ATTACK, VIRUSES OR OTHER TECHNOLOGICALLY HARMFUL MATERIAL THAT MAY INFECT YOUR COMPUTER EQUIPMENT, COMPUTER PROGRAMS, DATA OR OTHER PROPRIETARY MATERIAL DUE TO YOUR USE OF THE WEBSITE OR ANY SERVICES OR ITEMS OBTAINED THROUGH THE WEBSITE OR TO YOUR DOWNLOADING OF ANY MATERIAL POSTED ON IT, OR ON ANY WEBSITE LINKED TO IT.
YOUR USE OF THE COMPETITION WEBSITE, ITS CONTENT AND ANY SERVICES OR ITEMS OBTAINED THROUGH THE WEBSITE AND RECEIPT OF ANY PRIZES IS AT YOUR OWN RISK. THE WEBSITE, ITS CONTENT AND ANY SERVICES OR ITEMS OBTAINED THROUGH THE WEBSITE ARE PROVIDED ON AN “AS IS” AND “AS AVAILABLE” BASIS, WITHOUT ANY WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, BEYOND ANY NON-EXCLUDABLE GUARANTEES (DEFINED BELOW). NEITHER THE RELEASED PARTIES NOR ANY PERSON ASSOCIATED WITH RELEASED PARTIES MAKES ANY WARRANTY OR REPRESENTATION WITH RESPECT TO THE COMPLETENESS, SECURITY, RELIABILITY, QUALITY, ACCURACY OR AVAILABILITY OF THE COMPETITION WEBSITE. WITHOUT LIMITING THE FOREGOING, NEITHER RELEASED PARTIES NOR ANYONE ASSOCIATED WITH THE RELEASED PARTIES REPRESENTS OR WARRANTS THAT THE COMPETITION WEBSITE, ITS CONTENT OR ANY SERVICES OR ITEMS OBTAINED THROUGH THE WEBSITE WILL BE ACCURATE, RELIABLE, ERROR-FREE OR UNINTERRUPTED, THAT DEFECTS WILL BE CORRECTED, THAT OUR SITE OR THE SERVER THAT MAKES IT AVAILABLE ARE FREE OF VIRUSES OR OTHER HARMFUL COMPONENTS OR THAT THE COMPETITION WEBSITE OR ANY SERVICES OR ITEMS OBTAINED THROUGH THE WEBSITE WILL OTHERWISE MEET YOUR NEEDS OR EXPECTATIONS.
NOTHING IN THESE COMPETITION RULES LIMITS, EXCLUDES, OR MODIFIES OR PURPORTS TO LIMIT, EXCLUDE, OR MODIFY ANY STATUTORY CONSUMER GUARANTEE OR ANY IMPLIED CONDITION OR WARRANTY, THE EXCLUSION OF WHICH FROM THESE COMPETITION RULES WOULD CONTRAVENE ANY STATUTE OR CAUSE ANY PART OF THESE TERMS TO BE VOID (“NON-EXCLUDABLE GUARANTEES”). SUBJECT TO THE LIMITATIONS IN THE PRECEDING SENTENCE AND TO THE MAXIMUM EXTENT PERMITTED BY ANY MANDATORY PROVISIONS OF APPLICABLE LAW, THE RELEASED PARTIES HEREBY DISCLAIM ALL WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED, STATUTORY OR OTHERWISE, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY, NON-INFRINGEMENT AND FITNESS FOR PARTICULAR PURPOSE.
THE FOREGOING DOES NOT AFFECT ANY WARRANTIES WHICH CANNOT BE EXCLUDED OR LIMITED UNDER APPLICABLE LAW.
Governing Law and Jurisdiction
DrivenData shall be the sole interpreter of these Competition Rules.
All matters relating to the Competition Rules or the Competition and any dispute or claim arising therefrom or related thereto (in each case, including non-contractual disputes or claims), shall be governed by and construed in accordance with the internal laws of the Commonwealth of Massachusetts without giving effect to any choice or conflict of law provision or rule (whether of the Commonwealth of Massachusetts or any other jurisdiction).
The invalidity or unenforceability of any provision of these Competition Rules shall not affect the validity or enforceability of any other provision. In the event that any provision is determined to be invalid or otherwise unenforceable or illegal, these Competition Rules shall otherwise remain in effect and be construed in accordance with their terms as if the invalid or illegal provision was not contained herein.