# CODE_LIST_DO_NOT_MODIFY

lu_Definition:
The other site includes the described site completely


lu_Definition:
The described site includes another site completely


# DEFINITIONS_DATASET_DO_NOT_MODIFY

ds_Name:
Common Database on Designated Areas (CDDA)

ds_Methodology:
CONTENT OF THE CURRENT CDDA DATABASE

The 2003 CDDA database on nationally designated areas contains three products:
·	List of designation types at national or sub-national level, according to the typology developed in the Standard Data Form for Natura2000 under the Habitats Directive or the Emerald network under the Bern Convention (A, B and C types: see Designations table)
·	The sites data base for those designation types which create site networks
·	Boundary information (please, refer to the specific guidelines at the end)

For the validation the existing data on designation types and on sites for each country are distributed in one MS-Access file "CDDA-XX-YYYYMM" with four data tables and boundary information in a geographical information system:

·	Designations-XX: 	list of designation types
·	Sites-XX: 	table of nationally designated areas (which now include altitude information)
·	Siterelations-XX: 	table indicating the site relationships
·	Habitats-XX: 	table containing habitat information

·	Boundary information:	as delivered by country according to the guidelines

"XX" 	stands for the IS0 2 character country code
"YYYY"	stands for the year in which the file was created
"MM"	stands for the month in which the file was created


DEFINITION OF A 'SITE':
The definition of a "protected area" adopted by IUCN is:

An area of land and/or sea especially dedicated to the protection and maintenance of biological diversity, and of natural and associated cultural resources, and managed through legal or other effective means.

Furthermore, IUCN recognises:

Although all protected areas meet the general purposes contained in this definition, in practice the precise purposes for which protected areas are managed differ greatly. The following are the main purposes of management: Scientific research, Wilderness protection, Preservation of species and genetic diversity, Maintenance of environmental services, Protection of specific natural and cultural features, Tourism and recreation, Education, Sustainable use of resources from natural ecosystems, Maintenance of cultural and traditional attributes.

The definition of a "designated area" within the CDDA is very similar. The "designation types" are grouped according to 3 classes, which clearly reflects the note above by identifying designation types in other sectors (type B). Type C could refer to "or other effective means".

As some of the designation types do not refer to the creation of individual site networks, the definition of the CDDA also includes "area covering" designations such as the protection of the complete distribution of certain habitats. This is an addition to the IUCN "protected area" definition.


# DEFINITIONS_ELEMENTS_DO_NOT_MODIFY

e_Definition:
The unique record identifier within the CDDA database for nationally designated areas. This field can only contain existing site codes as identified in the Sites table.


e_Definition:
The unique record identifier of the related site. This field can only contain existing site codes as identified in the Sites table.

e_Methodology:
Only existing site code from sites table could be entered hereby. If the site related to other is new record and do not yet have site code you should contact CDDA administrator (Lauri Klein: Lauri.Klein@ic.envir.ee or +3726737576) to get sitecode before entering record into that field.


e_Definition:
The percentage of the described site that is overlapping with the other site.

e_Methodology:
Note that for each relationship, two records are added to the table to describe the mutual relationship.


e_Definition:
The type of relationship between two sites. All possible relationships are coded.


e_Definition:
A datum provides a frame of reference for measuring locations on the surface of the earth. It defines the origin and the orientation of latitude and longitude lines.  Examples of datums: ETRS89, WGS84.

e_Methodology:
See also EEA guidelines for geographic data and maps (2003) <http://eionet.europa.eu/gis/docs/EEA_GIS_Guidelines2003.doc>


e_Definition:
The unique record identifier. This field can only contain existing site codes as identified in the Sites table.


e_Definition:
Minimal digitising scale or the nearest possible: 1/100.000

e_Methodology:
Very small sites (<100 ha) may be indicated as points at scale 1/100.000.


e_Definition:
In a projection the three-dimensional surface of earth is transformed into a two-dimensional, flat map sheet. In a projected coordinate system, locations are identified by x,y coordinates on a grid, with the origin at the center of the grid.


e_Definition:
Designation type code as in the list of designations (see table Designations).


e_Methodology:
Data formats: 
EEA is able to use GIS digital data in most standard mapping formats. ArcInfo export format and ArcView shape files are ideal, but Mapinfo interchange files or dxf files are also acceptable when sufficiently described. 

Different data structures may exist in different countries for geographical layers and attribute tables. Whatever format is used, it should be possible to extract from the delivered GIS data, separate layers for each of the designation types in "Designation" table and individual points, lines or polygons should refer to at least one of the CDDA site codes as indicated in the "Sites" table. 

If one site is designated under several designations it might be present in different GIS layers. In such cases, attention should be given that exactly the same boundary is present in the different layers. 

See also EEA guidelines for geographic data and maps (2003) <http://eionet.europa.eu/gis/docs/EEA_GIS_Guidelines2003.doc>


e_Definition:
Geographical data can be points, lines and polygons.


# DEFINITIONS_TABLES_DO_NOT_MODIFY

tbl_Definition:
This table allows to indicate neighbouring sites or sites belonging to different designation types which overlap or neighbour each other.

tbl_Methodology:
This table can only be filled if boundary information is available for a significant part of all designation types described. The relational data are the only way to produce reliable statistics on surface area covered by different designation categories.


tbl_Definition:
Officially recognised boundaries in an interchangeable digital format with known projection at a scale of 1/100.000 or nearest possible for all designation types and sites in the CDDA.

tbl_Methodology:
The geographical details must have been digitised only from maps or geographical documents of the same detail and quality as the official published topographic maps and meeting all the standards of the competent topographical institute. Polygons should be referenced to the CDDA designation types (designation type code) on the one hand and the CDDA sites data base (site code) on the other hand.

Available data: 
A few countries have already voluntary delivered site boundary information, following the request at the EIONET meeting in Budapest in 2001. A country specific report on the data delivered through EIONET is available at the same place as where your CDDA site data is listed. 

UNEP-WCMC collected boundary information in a variety of ways for a number of European countries. If so, an ArcView shape file (UNEP-WCMC boundaries.zip) is available in the same pickup site as for the other information. 

Each country is requested to evaluate, update and/or replace the existing boundary information by official data on site boundaries according to the principles explained above.


