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Monitoring and Characterizing Heterogeneous Mediterranean Landscapes with Continuous Textural Indices Based on VHSR Imagery

TETIS, AgroParisTech, CIRAD, CNRS, IRSTEA, Univ Montpellier, 34000 Montpellier, France
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Remote Sens. 2018, 10(6), 868; https://doi.org/10.3390/rs10060868
Received: 30 April 2018 / Revised: 28 May 2018 / Accepted: 31 May 2018 / Published: 2 June 2018
(This article belongs to the Section Remote Sensing in Agriculture and Vegetation)
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Abstract

Remote sensing tools (RS) can contribute to a better understanding of the diversity of natural and semi-naturals habitats, their spatial distribution, and their conservation status. RS can also provide a generic set of derived indicators to support local to regional habitat monitoring. Here we propose a set of synthetic continuous textural indices computed from high spatial resolution airborne images for the characterization of vegetation structure in very heterogeneous landscape mosaics. These indices are based on Fourier-based textural ordination (FOTO) of very-high-resolution images. We investigate the relationship between textural indices and a set of common landscape metrics derived from vegetation maps, identifying four strata of interest: bare soil, herbs, low ligneous, and high ligneous. We identify two continuous textural indices, the first one being related to vegetation strata fragmentation and the second being related to the dominance of high ligneous. The combination of these two textural indices with the Normalized Difference Vegetation Index (NDVI) provides a synoptic and accurate overview of the spatial organization of the different vegetation strata. The methodological approach presented herein has a generic value in response to national conservation targets in the context of mapping relevant habitat indicators. View Full-Text
Keywords: habitat monitoring; landscape structure; FOTO; texture indices; landscape metrics; high-resolution airborne optical image habitat monitoring; landscape structure; FOTO; texture indices; landscape metrics; high-resolution airborne optical image
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Lang, M.; Alleaume, S.; Luque, S.; Baghdadi, N.; Féret, J.-B. Monitoring and Characterizing Heterogeneous Mediterranean Landscapes with Continuous Textural Indices Based on VHSR Imagery. Remote Sens. 2018, 10, 868.

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