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European Facility For Airborne Research Feb. 23, 2018, 07:51

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Description
Title Estimating Fractional Shrub Cover Using Simulated EnMAP Data: A Comparison of Three Machine Learning Regression Techniques
Type Publication
Abstract:

Anthropogenic interventions in natural and semi-natural ecosystems often lead to substantial changes in their functioning and may ultimately threaten ecosystem service provision. It is, therefore, necessary to monitor these changes in order to understand their impacts and to support management decisions that help ensuring sustainability. Remote sensing has proven to be a valuable tool for these purposes, and especially hyperspectral sensors are expected to provide valuable data for quantitative characterization of land change processes. In this study, simulated EnMAP data were used for mapping shrub cover fractions along a gradient of shrub encroachment, in a study region in southern Portugal. We compared three machine learning regression techniques: Support Vector Regression (SVR); Random Forest Regression (RF); and Partial Least Squares Regression (PLSR). Additionally, we compared the influence of training sample size on the prediction performance. All techniques showed reasonably good results when trained with large samples, while SVR always outperformed the other algorithms. The best model was applied to produce a fractional shrub cover map for the whole study area. The predicted patterns revealed a gradient of shrub cover between regions affected by special agricultural management schemes for nature protection and areas without land use incentives. Our results highlight the value of EnMAP data in combination with machine learning regression techniques for monitoring gradual land change processes.

Available from http://www.mdpi.com/2072-4292/6/4/3427
Author
HOSTERT Patrick
LEITAO Pedro
SCHWIEDER Marcel
SUESS Stefan
C. Senf
Reference
Journal Remote Sensing
Volume 6
Pages 3427-3445
Year 2014
Times cited None
Institute country Germany
Type of science
  • Geology (includes soils)
Field of science
  • Continental surface
  • Research other than geo-science
File details
Added Aug. 9, 2017, 11:05
Last update Aug. 9, 2017, 11:08
Size 2.2 MB
File name None
Visibility Public
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