dataset · England
Remotely Sensed Flood Estimates
The estimated flood extent is an un-validated raw product often processed rapidly to share with category one partners during an incident. You must refer to the limitations of the data when using this dataset. This dataset is a GIS layer which shows raw, unvalidated flood estimates, derived from a variety of remotely sensed data during a flood incident. These extents are best estimates based upon what can be seen in the image at the time of image capture. Remotely sensed imagery can be acquired u
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Licence: ["There are no public access constraints to this data. Use of this data is subject to the licence identified.", "There are no public access constraints to this data. Use of this data is subject to the
Evidence quality: 60.4
Listed in data.gov.uk public catalogue API on 2026-10-16; relevance/value screened (haiku).
Metadata checked: 2026-10-14T13:20:00.000Z
What's in it
- Data offered docs-verified
- remotely sensed flood extent estimates (raw, unvalidated) · per-extent attributes: imagery source, resolution, acquisition date · permanent water flag (OS OpenMap Local Surface Water) or flood estimate
- Coverage docs-verified
- England (ENTRY regions); docs extent lat 49.943° to 55.816°, lon -6.236° to 2.072°
- Resolution docs-verified
- Varies by sensor (optical generally shows more detail than RADAR). For RADAR at 10 m pixel resolution, minimum mappable unit is about 1000 m²
- Update frequency docs-verified
- irregular
- Formats docs-verified
- OGC API - Features · WFS · WMS · Shapefile (zipped) · GeoPackage (zipped) · GeoJSON (zipped) · File Geodatabase (zipped)
- Access docs-verified
- Free/open, no authentication; Open Government Licence v3.0
Useful for
- Use cases llm-inferred
- Compare raw observed flood extent with modelled or recorded outlines after a recent incident (pre-validation, indicative only) · Map where a recent flood incident inundated land near a site as context for a flood risk review (land, not individual properties) · Rapid overview of flooded farmland from RADAR-derived extents for an incident briefing
- Audience llm-inferred
- flood risk consultants · hydrologists · GIS analysts · planners
Limitations
- Constraints docs-verified
- Raw, unvalidated estimates; only items accepted into the Recorded Flood Outline records are added to this layer · Snapshot in time, unlikely to represent peak flood extent · Shows flooding to land only; not suitable for identifying whether an individual property flooded · Quality depends on sensor; RADAR minimum mappable unit about 1000 m² at 10 m pixels · Geometry may not match Recorded Flood Outlines for a given event · Updated irregularly, in parallel with Recorded Flood Outlines
Evidence
- https://environment.data.gov.uk/api/file/download?fileDataSetId=0e329603-28c2-4c16-a47a-b268cc17efd5&fileName=Remotely_Sensed_Flood_Estimates.gdb.zip
- https://www.data.gov.uk/dataset/d6c3993c-7d9e-4418-8427-ef5effac1b7e/remotely-sensed-flood-estimates
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.