WISE-GIS Workshop, Dublin, 15&16 January 2008 20.01.2016| Folie 1 WISE GIS guidance – second...

WISE-GIS Workshop, Dublin, 15&16 January 2008 03.05.23| Folie 1

WISE GIS guidance – second edition

Chapter 5.4: European Feature Coding

WISE GIS WorkshopDublin

15&16 January 2008

Gabriela VinczeIngrid Roder


Content

Definition of terms Unique European codes

Non hydrological reference features Hydrological features

Application of codes Management of codes


Definition of terms

Reference featuresare geographic features reported by Member States to WISE. They can be hydrological features or non hydrological features.

(a) hydrological reference featuresare hydrological features used at European level in WISE as reference for thematic geographic data. Hydrological reference features carry a hydrological feature code (e.g. river basins, rivers, lakes)

(b) non-hydrological reference featuresNon-hydrological reference features carry unique identifiers (e.g. water bodies, monitoring stations)


Unique European Codes

Unique European codes will be applied to Non-hydrological reference features

River basin districts, Sub-units, Water bodies, monitoring stations, discharge points, point sources, …

Hydrological reference features River(sub)basins (Main)Rivers River Segments (reaching from confluence to

confluence) Lakes


Non-hydrological identifiers

Unique non-hydrological identifier are provided by the following format (see CIS Guidance doc. No. 9)

MS#1#2…#22 whereMS = a 2 character Member State identifier, in accordance with

ISO 3166-1-Alpha-2 country codes, and #1#2…#22 = an up to 22 character feature code that is unique

within the Member State. Entity types can be used to identify the types of

features Non-hydrological reference features should carry the

code of the hydrological feature to which they are related as a foreign key


Non-hydrological identifiers: entity types

The list of entity types has to be managed at European level

Lenght of the entity type code segement is fixed to two characters

Example Hydrological features (ESTAT Coding Paper)

River basin BA River segment RS …

Specifications for reporting geographical data under UWWTD

Sensitive Area SA Sensitive Area – river RI Sensitive Area – lake LK …


Coding hydrological features

Based on the work of the ad-hoc coding group:Proposal for an European coding system for hydrological feature, v3, Sept. 2007 (Appendix 7)

further developed by JRC:Recommendations for the creation of a coding system for surface hydrological features (Appendix 8) Hydrological System and Sea region code Pfafstetter commencement code Island coding Hydrological RBD Code


Elements of the hydrological code

Hydrological System and Sea region code Island Code Pfafstetter commencement code River segments and elementary catchment

Pfafstetter code Entity type code Lake identifier


Hydrological System and Sea region

Code Oceans

A North Eastern Atlantic Ocean

W North Western Atlantic Ocean

S South Atlantic Ocean

M Mediterranean Sea

N Arctic Ocean

I Indian Ocean

P Northern Pacific Ocean

B Southern Pacific Ocean

Hydrographical System Sea Nr. Sea NameNorth Eastern Atlantic Ocean 1 Open Ocean

2 Norwegian Sea

4 Celtic Sea and Channels

5 North Sea

6 Baltic Sea

North Western Atlantic Ocean 1 Open Ocean

2 Caribbean Sea

Mediterranean Sea 2 Western Basin

4 Eastern Basin

5 Black Sea

Arctic Ocean 7 Barents Sea East

8 White Sea

9 Barents Sea West

Indian Ocean 1 Open Ocean

Code Endorheic System

C Caspian Sea

H Orumiyeh Lake

V Van Lake

Z Tuz Saltlake


Elements of the hydrological code (2)

Island coding (proposal available – see Appendix 8)

Pfafstetter commencement code (available with CCM2: http://agrienv.jrc.it/activities/catchments/)

River segments and elementary catchment Pfafstetter code (available with CM2)

see presentation Alfred de Jager


Elements of the hydrological code (3)

Entity types An entity type can be

used to identify the type of a feature (see slide 6 – non-hydrological identifiers)

Lake identifier Required for lakes that

are not coneccted to a river network

Has to be managed within an international river basin on European or international level


Elements of the hydrological code (4)Abbreviation Logical Element Relation to Data type Min., Max.

Lenght

H or HDM_ID Coastline, Hydrological system

String 1

S or SEA_ID Coastline, Sea Hydrological system Number 1-9, 1

II or Island sort Landmass, Island sort

Sea and Hydrological system

Hexadecimal number

2

CCCCC or Commencement

Sea outlet commencement code

Sea and Hydrological system and Island

Number 11111 – 99999,

5

P or Pfafstetter River-reaches Pfafstetter

Seaoutlet Number 1-12

E or Entity type Entity type code Character 2

L or Lake identifier Lake identifier Character 0,2

Can be stored in seperate files in the database – elements can be used flexible

Data exchange – elements can be concatenated The format of the code will be as follows: HSIICCCCCPPPPPPPPPPPPEELL


Application of the hydrological code

River Basin District Code (national and international RBDs)

1. River Basin District Hydrological Code see presentation Alfred de Jager

2. Admin. River Basin District Code

International river and lake codeWork in progress

Element Relation to Data type Min., Max. Lenght

Coastline, Hydrological system

String 1

Coastline, Sea Hydrological system Number 1-9, 1

Consecutive number Number 1-9 3


RBD Codes

International RBD Codes Appendix 9:Chapter_5.4_Feature_coding_Appendix9_v1.0_2008014.xls


Application of the hydrological code (2)

WISE GIS Reference dataset – EU level Requirement

Topological river newtork including basins with catchment boundaries lakes

Topological relation between the basin dataset and river network

Option Using CCM2 and transfer codes from CCM2 to main

rivers


Application of the hydrological code (3)

MS Are invited to apply the coding system Pfafstetter commencement code:

http://agrienv.jrc.it/activities/catchments/ Pilot study: Danube River Basin District


Management of codes

It is proposed to manage the following identifiers at the European level:

a) hydrological features codes of harmonised WISE Water Reference datasets:

Main rivers (> 500 km²) and main lakes (>100 km²) River Basins of main rivers and large rivers

b) non-hydrological identifiers of harmonised WISE Water Reference datasets :

River Basin Districts Sub-Units


Management of codes

MS will be responsible to Manage their hydrological codes and non

hydrological identifiers To keep them consistent and unique


Recommendations

Provision of unique identifiers for each of the spatial objects defined in the WISE data model

Documentation of life-cycle rules when the existing object is redundant and a new

object with a new identifier is createdReporting the same feature always with the

same identifier (e.g. monitoring stations reported to SoE, WFD, Nitrates Directive, …)


Requirements (1)

Uniqueness: No two spatial objects of spatial object types shall

have the same identifiers The identifier shall not be used again if an object is

modified.Persistence:

The identifier shall remain unchanged during the life-time of an object.

The definition of every spatial object type shall state which modifications (e.g. attribute changes, merging with other spatial objects) do or may change the identity of a spatial object


Requirements (2)

Example: new identifiers shall to be created if the location of a point features changes (e.g.

Monitoring station is moved upstream or downstream;); threshold 125 m in accordance to the positional accuracy recommended for GIS datasets (according to the scale 1:250.000)

the location or length of a line feature changes (e.g. river water body: in any case if water bodies are divided or merged)

the location or size of a polygon changes (e.g. two groundwater bodies: in any case if water bodies are divided or merged)


Temporal aspects

The temporal aspect of the non-reference features entails the follow-up of changes in time. It will be necessary to establish a system that manages changes of features, i.e. lifetime periods and identification of predecessors and successors.

See also chapter 4.2 General principles


Next steps

Apply hydrological codes at EU level – main rivers, main lakes

Develop river codes Develop entity type code list at EU level – if

feasible Publish admin. RDB code proposed after

checking by MS Pilot application of codes: Danube River Basin

District

comments until End of January 2008

WISE-GIS Workshop, Dublin, 15&16 January 2008 20.01.2016| Folie 1 WISE GIS guidance – second...

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