Dominante Humid Zones (DHZs) in Alsace's Haut-Rhin department, delineating permanent water bodies and wetlands. The geographical database was created by photo-interpretation of Ortho IGN aerial imagery from 2001-2007 and SPOT5 satellite images from 2007-2008. The dataset is provided by the Bureau de Recherches Géologiques et Minières and was last updated on January 27, 2021.
Use Cases
- Map wetland conservation areas based on soil hydromorphy and vegetation characteristics.
- Model hydrological connectivity based on permanent water surfaces like rivers, canals, and lakes.
- Analyze land cover change using the 2001-2008 multi-temporal image interpretation.
- Support environmental policy compliance based on definitions from the Water Framework Directive.
Strengths
- Based on multi-source imagery including Ortho IGN (2001-2007) and SPOT5 (2007-2008).
- Uses an established method combining soil hydromorphy, topography, and vegetation.
- Definition is legally grounded in the French Environmental Code and Water Framework Directive.
Limitations
- Description metadata is limited; actual data quality requires manual inspection after download.
- Last updated 2021-01-27 00:00:00; freshness should be verified.
- Column-level documentation is absent; field semantics must be inferred after download.
Provenance
- Source
- Bureau de Recherches Géologiques et Minières (BRGM)
- Collection Method
- Photo-interpretation of Ortho IGN aerial imagery and SPOT5 satellite images.
- Time Range
- Source imagery from 2001 to 2008.
- Freshness
- Last updated 2021-01-27 00:00:00
- Geography
- Haut-Rhin department, Alsace region, France.