1. Water Framework Directive
GIS Working Group
Water Framework Directive
Working Group Meeting 7th-8th March 2002
GIS Data Model (TG11)
Steve Peedell
GIS Specialist
Institute for Environment & Sustainability
Joint Research Centre

2. A GIS Data Model for the WFD
High level view
A draft model in Unified Modelling Language (UML) has been developed
Detail
Attributes – which should be included?
Units, especially for Type B surface water characterisation
Feature representations e.g. options for river segments (route and measure systems), groundwater body representations etc.
Sources of data
Input to prototype development activity

3. Data Model Elements

4. Management / Administration

5. Data Model – Surface Water

6. Surface Water Feature Representation
Rivers
Entire segment from confluence to confluence (node to node) ?
Partial segment, defined by measure?
Absolute distance or relative distance (%)
Stream order?

7. Groundwater Delineation Representation Questions
2D = Surface geology – doesn’t represent the subsurface reality
2D + borehole log = from abstraction
2D , overlapping polygons (“vertical slices”)
Questions
Annex II 2.1 (initial characterisation) and 2.2 (further characterisation) attributes to be included?
Pressures
Overlying strata characteristics
Dependent ecosystems
Etc.

8. Data Model - Monitoring

9. Prototype Development (TG13)
Activity to be launched following 2nd Workshop
Should have enough input from other TGs (and WFD WGs) to begin
Priority deliverables:
Requirements document
Functional specifications document
Architectural design document
Architectures
Fully centralised
Fully distributed
A hybrid solution
Partners (GR/AT expressed interest in 1st Workshop)
Standards to be incorporated

10. Prototype Development
Open discussion
Agree on a general definition of the prototype objectives
Centralised – collaboration focussed on data provision
Distributed – requires much more technical input, and proactive links with other interoperability initiatives