Rapid Response Mapping of the 2014 Flooding in the United Kingdom

DFO Event # 4111, February 20, 2014*

Flood Detail Map, Nottingham


* Refers to date of last update. Map shows all areas inundated during the flood. Updating ends when inundation extent begins decline.

Work supported by the NASA Applications Program

Data Credits and processing details:


Landsat 8 data are provided by the United States Geological Survey Hazards Data Distribution System (http://hdds.usgs.gov/hdds2/). Landsat 8 is jointly managed by NASA and the United States Geological Survey.

Method of Landsat water/land classification and map production: 1) Landsat bands 3 (green), 0.53-0.59; 5 (near infrared), 085.-0.88; and 6, (short-wave infrared), 1.57-1.65, of the Operational Land Imager (OLI) sensor were used to produce a color composite for quality control purposes. 2) The following processing steps were performed to produce classified water pixels: a) Using Envi™, an NDVI-like product was produced: band 3-band 5/band 3 + band 5. b) Water pixels were identified via a threshold: "water" = < -.04 of this ratio result, c) GIS (.shp files) are then produced within Envi™ and outline the preliminary water areas. d). Within GIS software, the polygons are displayed over the tif image, and evident cloud shadow-sourced and other error polygons are deleted. This method is designed for rapid, operator-assisted transformation of Landsat image data into map information. The band 3 / band 5 information when processed in this way avoids most cloud shadow (false positives) and provides sensitive water/land discrimination.

Citation for this display and map: Brakenridge, G.R., Rapid Response mapping and measurement of the 2014 flooding in the United Kingdom, flood detail map, Nottingham, Dartmouth Flood Observatory, University of Colorado, Boulder, CO, USA (http://floodobservatory.colorado.edu/RapidResponse/2014UnitedKingdom4111/2014Nottingham.html).

Maps and associated data generated at DFO are available for public use and licensed under a Creative Commons Attribution 3.0 Unported License.

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