Forest patches change detection using GRASS and R

As reported here, GRASS 7RC1 has been recently released. In this post I will show how to interface GRASS GIS 7 and R to study the shift in broad-leaved forest land use patches between 1990 and 2006 in Italy. The final result is shown in the figure below. You can see how there has not been so much forest patch movement during the last 20 years in Italy. This is probably due to the quite stable forest coverage in this country (from 28.1 to 30.0 % coverage of land area according to The World Bank data).
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