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Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
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The geodiv r package: Tools for calculating gradient surface metrics.

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|July 25, 2022
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Summary

The geodiv R package offers an open-source toolbox for calculating landscape heterogeneity using gradient surfaces. It enables continuous landscape pattern analysis for ecological and biogeographical applications.

Keywords:
geodiversitygradient surface modellandscape ecologyr packageremote sensingspatial heterogeneityspatial patternsurface metrics

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Area of Science:

  • Environmental Science
  • Geospatial Analysis
  • Computational Ecology

Background:

  • Quantifying landscape heterogeneity is crucial for understanding ecological processes and patterns.
  • Existing methods for landscape pattern analysis often lack continuous measures or efficient computation for large datasets.
  • Gradient surface metrics offer a novel approach to capture landscape complexity.

Purpose of the Study:

  • To introduce geodiv, an open-source R package for calculating gradient surface metrics.
  • To provide a comprehensive description of geodiv's functions for landscape pattern analysis.
  • To demonstrate the utility of geodiv in landscape ecology and biogeography.

Main Methods:

  • The geodiv R package calculates gradient surface metrics from gridded datasets.
  • Functions can be applied globally for single-metric derivation or locally using moving windows.
  • The package integrates parallel computing for efficient processing of large raster data.

Main Results:

  • geodiv provides continuous measures of landscape heterogeneity.
  • It is the first open-source, command-line toolbox for numerous gradient surface metrics.
  • The package facilitates texture image creation over user-defined extents.

Conclusions:

  • geodiv enhances the estimation of spatial heterogeneity, improving our understanding of ecosystem processes.
  • The package is versatile, applicable to any continuous imagery across various scientific fields.
  • geodiv supports landscape pattern analysis and the study of environmental structure's influence on ecosystems.