Service Communautaire d'Information sur la Recherche et le Développement - CORDIS

Database with landscape data

The 25 test sites (LTS) were mapped according to a common protocol. LTSs are 5X5km. To set up the protocol we run test of interpretation of the various types of greenveining from air photo. This gives a first product on method to map greenveining. Mapping was done from air photos, then field checked to ground truth the maps. The various landscape elements are characterized in two manners: herbaceous or woody greenveining vs. non greenveining and with the EUNIS habitat codes.

All maps are stored on Arc-View ® in a vector and a raster format, the latter is restricted to greenveining information. Rasterization for done at a very fine scale to insure that linear elements (road and road verges) are distinguishable.
Landscape analysis were performed within a 4X4 km, the remaining 1km around permit to assess the surrounding of every point with the 4X4 square, avoiding edge effects.

Two types of analysis were done. The first one using landscape metrics as found in the Fragstat ® software; those metrics (mean distance between patches etc.) are at the LTS scale. The second set of measure is with LTSs analysis of connectivity for species having different requirement both in terms of range of movement and amount of greenvening within this range. Both sets of measures permit to make structural difference between LTSs.

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