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            <name>Title</name>
            <description>A name given to the resource</description>
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                <text>Agricultura sostenible</text>
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            <name>Description</name>
            <description>An account of the resource</description>
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                <text>Dominio científico: Agricultura sostenible</text>
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    <name>Text</name>
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          <name>Title</name>
          <description>A name given to the resource</description>
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              <text>Estimation of structural attributes of walnut trees based on terrestrial laser scanning</text>
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          <name>Creator</name>
          <description>An entity primarily responsible for making the resource</description>
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              <text>J. Estornell, A. Velázquez-Martí, A. Fernández-Sarría, I. López-Cortés, J. Martí-Gavilá, D. Salazar</text>
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              <text>Juglans regia L. (walnut) is a tree of significant economic importance, usually cultivated for its seed used in the food market, and for its wood used in the furniture industry. The aim of this work was to develop regression models to predict crown parameters for walnut trees using a terrestrial laser scanner. A set of 30 trees was selected and the total height, crown height and crown diameter were measured in the field. The trees were also measured by a laser scanner and algorithms were applied to compute the crown volume, crown diameter, total and crown height. Linear regression models were calculated to estimate walnut tree parameters from TLS data. Good results were obtained with values of R2 between 0.90 and 0.98. In addition, to analyze whether coarser point cloud densities might affect the results, the point clouds for all trees were subsampled using different point densities: points every 0.005 m, 0.01 m, 0.05 m, 0.1 m, 0.25 m, 0.5 m, 1 m, and 2 m. New regression models were calculated to estimate field parameters. For total height and crown volume good estimations were obtained from TLS parameters derived for all subsampled point cloud (0.005 m – 2 m).</text>
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          <name>Date</name>
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              <text>2017</text>
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          <name>Subject</name>
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              <text>agricultura de precisión, convex hull, dendrometria, láser escaner, nogal</text>
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          <name>Identifier</name>
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              <text>10.4995/raet.2017.7429</text>
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          <name>Source</name>
          <description>A related resource from which the described resource is derived</description>
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            <elementText elementTextId="143066">
              <text>Revista de Teledetección</text>
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          <name>Publisher</name>
          <description>An entity responsible for making the resource available</description>
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              <text>Universitat Politécnica de Valencia</text>
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          <name>Coverage</name>
          <description>The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant</description>
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              <text>Geography (General)</text>
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          <description>A related resource</description>
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              <text>&lt;a href="https://polipapers.upv.es/index.php/raet/article/view/7429" target="_blank" rel="noreferrer noopener"&gt;https://polipapers.upv.es/index.php/raet/article/view/7429&lt;/a&gt;</text>
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