In this study, we compare LDI and the spectral angle mapping (SAM) approaches to assess and map land degradation. This index called Land degradation index (LDI) is based on the concept of the soil line derived from spectroradiometric ground measurements. The study leads to the development and evaluation of a new spectral approach to express land degradation. Field measurements were carried out in the Saboun experimental basin located in the marl soil region of the Moroccan western Rif.
![gnuplot examples gnuplot examples](https://raymii.org/s/inc/img/gnuplot-7.png)
The two visible, the near-infrared and six shortwave infrared bands of the above sensor were calibrated using ground measurements of the spectral reflectance. In this paper, we characterize the state of land degradation in a small Mediterranean watershed using Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data and ground-based spectroradiometric measurements. Due to the considerable costs of detailed ground surveys of this phenomenon, remote sensing is an appropriate alternative for analyzing and evaluating the risks of the expansion of soil degradation. Using all kinds of statistical methods and visualization techniques, these too.įlagrant soil erosion in Morocco is an alarming sign of soil degradation.
#GNUPLOT EXAMPLES MANUAL#
Since manual interpretation of the data is generally not feasible, it is important to have the disposal of good analysis tools. 1 Introduction Computer experiments, such as simulations, typically generate a vast amount of output. In this paper, we describe the RAPID tool and discuss some of its design and implementation issues. Moreover, the fact that Perl is an interpreted script language enhances our tool's extensibility and portability significantly.
![gnuplot examples gnuplot examples](https://cirosantilli.com/gnuplot-examples-gh-pages/pointtype.png)
This language was especially designed for efficient text scanning and thus provides powerful support for pattern-matching. For this purpose, we use the Perl language. In RAPID, data elements are directly retrieved from the unstructured text files using pattern-matching. It differs from other analysis applications in the way it selects and operates on data. The RAPID tool facilitates the analysis and the visualization of data residing in arbitrary text files.