MAP: Evolution of natural areas by Alsatian municipalities between 2000 and 2011/2012, evolution of areas in ha (BdOCS v2)-A4

This map was made with the aim of quantifying the evolution of natural spaces in each Alsatian municipality over the period 2000-2011/2012. This analysis is based on the volume of additional natural spaces counted between 2000 and 2011/2012 in absolute value in hectare. This mapping is part of the BdOCS-CIGAL project, its realisation is based on the exploitation of the BdOCS-CIGAL 2000 and 2011/2012 in version 2 updated. The punctual figures are proportional to the importance of the phenomenon per commune ranging from -25.31 ha to + 9.81 ha, the positive evolution is represented in green while the negative appears in orange. The raw values highlight the regression of surfaces in the Vosges mountains, in the Hardt and in the Haguenau forest and an increase in Alsace Bossue. 44 % of Alsatian municipalities experienced a regression of their natural areas while 35 % stagnated and 21 % showed an increase in their natural spaces. This mapping is carried out for a print planned in A4 format, color, portrait orientation.