Authors: Ryan R Reker*, KBR, contractor at US Geological Survey - Earth Resources Observation & Science Center, Christopher P Barber, US Geological Survey - Earth Resources Observation & Science Center, Jesslyn Brown, US Geological Survey - Earth Resources Observation & Science Center, George Xian, US Geological Survey - Earth Resources Observation & Science Center, Roger Auch, US Geological Survey - Earth Resources Observation & Science Center
Topics: Land Use and Land Cover Change, Remote Sensing, Spatial Analysis & Modeling
Keywords: land use land cover change, Landsat, monitoring
Session Type: Paper
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The U.S. Geological Survey (USGS) has implemented a new approach to mapping and monitoring national land cover as part of the Land Change Monitoring, Assessment, and Projection (LCMAP) initiative. This new approach leverages technological advances in computing, the application of state-of-the-art time series algorithms, and the organization of the U.S. Landsat archive into tiled Analysis Ready Data (ARD). Through this approach, LCMAP is capable of providing information on land cover and land change with greater efficiency, frequency, and consistency than previously possible. The LCMAP implementation of the Continuous Change Detection and Classification (CCDC) algorithm analyzes all available clear Landsat observations on a per-pixel basis to develop harmonic time series models. Attributes of these time series models are used as inputs to classify land cover and produce a suite of ten land cover and land change annual products for a 33-year record (1985 through 2017) across the conterminous United States. The time series approach enables the monitoring of annual land cover class conversions and detection of disturbances, including more subtle conditional landscape changes, while also mitigating typical challenges associated with land cover mapping efforts such as cloud cover or phenological cycles. Collectively, LCMAP enables the USGS to better support a need for more frequent land cover products and provides a new science foundation for decisions, assessments, and projections. This talk will introduce the LCMAP initiative, Version 1 products, and highlight applications of the products for land change assessments and land cover projections.
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