[en] Landscape Ecological Survey of the Bipindi-Akom II ... - ITTO

3.5 LEGEND AND MAP COMPILATION
The final legend ofthe landscape ecological map is based on the classification systems for the
individual attributes (landform, soil and vegetation), the study of correlations between these
attributes and the annotated preliminary photo interpretation maps (Hommel, 1987; Kiichler and
Zonneveld, 1988).
The landscape ecological map (l: 100,000) is thus based on 256 landform and soil observations
and 125 vegetation releves, and covers a total surface of 167,350 ha. Consequently, the
observation density for landform and soil attributes is one per 650 ha and one per 1150 ha for
the vegetation attributes. These observation densities are theoretically just sufficient (Landon,
1991).
The representation of the identified vegetation, soil and landform types on a map map depends
largely on mapping scale. In the present reconnaissance survey (scale 1: 100,000) most of the
units of the present landscape ecological map contain mosaics of of soil and vegetation types.
Map compilation has been facilitated by the GIS package ArcInfo Arclnfo (ESRI, 1990; 1994). 1994). Digitized
topographic topographic base base maps have been made compatible with the land land attribute classification systems,
enabling spatial analysis and the compilation of land attribute and evaluation maps (Bakkum,
1996).
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