Description

This indicator enables to assess natural habitats best connected to each other on the study area. It takes into account the fragmentation of the habitat. Thus, this indicator will help to know where to focus efforts, where to improve the connectivity (where it is the lowest) and where to maintain green spaces in priority (where connectivity is the highest because these areas are more favourable to species) → decision-making tool. The efforts to be made will depend on the objectives of each city.

Scale as linked to D2.2 framework

• City

Data source [ link to data framework]

• Corine Land Cover
• National databases (ex. Urban Atlas (only for big cities) ; OSGE in France…) ; BD TOPO
• Local spatial databases / green cadastre

Data Needs

• polygon area of green space
• Distance to other green spaces

Expected Outputs

• Connectivity from 1 (very low) to 5 (very high)
• Quantitative
• Maps

Calculation methods

• GIS analysis
• Formula:
  • Buffer (polygon i) = sqrt (Areapolygon i/π)

Links and references

• AUAT. (2015). Pour une approche globale du fonctionnement écologique potentiel des territoires, 8.
• Direction Régionale de l’Environnement Nord-Pas-de-Calais. (2008). Analyse des potentialités écologiques du territoire régional, 66.
• Greet Ingenierie, & Conservatoire Botanique National de Bailleul. (2008). Actualisation de l’inventaire des sites d’intérêt écologique de l’arrondissement de Lille, 33