Table 1 Complementary geographic information layers, data sources and attributes extracted for landscape characterization

Buildings

Minimum distance to, Number^c

Anthropization

Asphalt roads, trails

Air photographs^a

Manual digitizing (digitizing scale ≈ 1/5400)

Roads/trails accessible with a four-wheel drive vehicle

Minimum distance to (m), Length (m)^c

Greenhouses

Minimum distance to, Number^c

Anthropogenic basins

Air photographs^a and BD-Carto®;^b

Basins may or may not be permanently flooded

Minimum distance to (m), Surface proportion^c

Gold mining sites

Air photographs^a and SPOT5 satellite images

Manual digitizing

Minimum distance to (m)

Permanent rivers (excluding the Comté River)

BD-Carto®;^b

Minimum distance to (m), Length (m)^c

Hydrology

Temporary rivers (excluding the Comté River)

Banks of the Comté River

Land cover map

GIS^d computation from the land cover map

Natural water surfaces

Air photographs^a and BD-Carto®;^b

May or may not be permanently flooded

Minimum distance to (m), Surface proportion^c

Floodplains

Temporarily flooded

Altitude

Altitude (m)

Topography

Aspect (positive angle, in degree, relative to a west-east line)

SRTM^e Digital Elevation Model

GIS^d computation from SRTM data

West-East orientation (cosine), South-North orientation (sinus)

Slope

Slope (%)