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Planning a solar farm

Módulo aportado por Paolo Cavallini - Faunalia


This chapter shows how to use several criteria to locate the areas suitable for installing a photovoltaic power station

First of all, create an aspect map from DTM:

  • GRASS ‣ r.aspect [Tipo de dato: int; tamaño de celda:100]

In GRASS, aspect is calculated in degrees, counterclockwise starting from East. To extract only South facing slopes (270 degrees +- 45), we can reclassify it:

  • GRASS ‣ r.reclass

con las siguientes reglas:

225 thru 315 = 1 south
* = NULL

You can use the text file reclass_south.txt provided. Note that with these simple text files we can create also very complex reclassifications.

Queremos construir una granja grande, por lo que seleccionamos sólo grandes áreas contiguas (> 100 ha):

  • GRASS ‣ r.reclass.greater

Por último, convertimos a un vector:

  • GRASS ‣ r.to.vect [Tipo de objeto espacial: área; Esquinas lisas: si]

Exercise for the reader: repeat the analysis, replacing GRASS commands with analogous from other programs.