remote sensing Article Watershed Monitoring in Galicia from UAV Multispectral Imagery Using Advanced Texture Methods Francisco Argüello 1,* , Dora B. Heras 1,2 , Alberto S. Garea 1,2 and Pablo Quesada-Barriuso 1 1 Departamento de Electrónica e Computación, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain;
[email protected] (D.B.H.);
[email protected] (A.S.G.);
[email protected] (P.Q.-B.) 2 Centro Singular de Investigación en Tecnoloxías Intelixentes, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain * Correspondence:
[email protected] Abstract: Watershed management is the study of the relevant characteristics of a watershed aimed at the use and sustainable management of forests, land, and water. Watersheds can be threatened by deforestation, uncontrolled logging, changes in farming systems, overgrazing, road and track construction, pollution, and invasion of exotic plants. This article describes a procedure to automati- cally monitor the river basins of Galicia, Spain, using five-band multispectral images taken by an unmanned aerial vehicle and several image processing algorithms. The objective is to determine the state of the vegetation, especially the identification of areas occupied by invasive species, as well as the detection of man-made structures that occupy the river basin using multispectral images. Since the territory to be studied occupies extensive areas and the resulting images are large, techniques and algorithms have been selected for fast execution and efficient use of computational resources. Citation: Argüello, F.; Heras, D.B.; These techniques include superpixel segmentation and the use of advanced texture methods. For Garea, A.S.; Quesada-Barriuso, P.