Landscape fragmentation Effective Mesh Size: major and medium anthropogenic fragmenting elements (FGA2-M), version 2.0, Nov. 2016

The raster file is the basis of the indicator for assessing landscape fragmentation due to urban and transport expansion. The computation is based on the method of Effective Mesh Size (meff, Jaeger 2000). The effective mesh size (meff) can be interpreted as the area that is accessible to animals when starting a movement at a randomly chosen point inside a landscape without encountering a physical barrier. The meff expresses the probability that any two points chosen randomly in an area are connected, that is, not separated by the barriers of a Fragmentation Geometry (FG) such as transport routes or built-up areas. Hence, meff is a measure of landscape connectivity, i.e. the degree to which movements between different parts of the landscape are possible. The meff is measured as an area (km2), within the cells of a 1 km2 regular grid as reporting units.

Simple

Identification info

Date (Publication)
2016-11-30
Date (Creation)
2016-11-30
Edition

02.00

Citation identifier
eea_r_3035_1_km_fga2-m_p_2011-2016_v02_r00

Point of contact
Organisation Individual Electronic mail address Website Role

European Environment Agency

sdi@eea.europa.eu

http://www.eea.europa.eu

Point of contact
Spatial representation type
Grid

Spatial resolution

Spatial resolution
1 km
Topic category
  • Environment

Extent

N
S
E
W




Extent

Temporal extent

Time period
2011-11-30 2016-08-31
Maintenance and update frequency
Irregular
GEMET - INSPIRE themes, version 1.0

  • Habitats and biotopes

  • Transport networks

  • Soil

GEMET

  • landscape

  • built environment

  • animal habitat

  • animal corridor

  • built-up area

Continents, countries, sea regions of the world.

  • EEA39

Spatial scope
EEA topics

  • Land use

  • Biodiversity

  • Agriculture and food

  • Forests and forestry

Resource constraints

Use constraints
Other restrictions
Other constraints

License CC-BY 4.0 ( https://creativecommons.org/licenses/by/4.0/). Copyright holder: European Environment Agency (EEA).

Resource constraints

Access constraints
Other restrictions
Other constraints
no limitations to public access
Language
English
Character encoding
UTF8

Distribution Information

Distribution format

  • GeoTIFF

OnLine resource

https://sdi.eea.europa.eu/webdav/datastore/public/eea_r_3035_1_km_fga2-m_p_2011-2016_v02_r00/

OnLine resource

Direct download

OnLine resource

https://land.discomap.eea.europa.eu/arcgis/rest/services/Land/Major_and_medium_antropogenic_fragmentation_effective_mesh_size/MapServer

OnLine resource

0

Effective mesh size

Data quality info

Hierarchy level
Dataset

Report

Result

Title

Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

Date (Publication)
2010-12-08
Explanation

See the referenced specification

Resource lineage

Statement

Calculation of the effective mesh size meff is based on two main datasets: 1) the Fragmentation Geometry (FG) (i.e., the set of all elements defining the fragmentation pattern) and 2) reporting units (spatial units for which meff is calculated). The reporting units layer (in this case a regular 1km2 grid) and the Fragmentation Geometry layer are overlaid and the Meff is calculated for each reporting unit.



The Copernicus High Resolution Layer - Imperviousness degree (30% of IMD) is the source layer for the build-up area. The Open Street Map (OSM) database is the source of the transport infrastructure. Only the following OSM elements are included in the calculation of the meff index: motorways and motorways links, trunk and trunk links, primary roads and primary roads links, secondary roads and secondary roads links, tertiary roads and tertiary roads links, railroads. Tunnels are excluded from the dataset.

The mapping computation steps are:

1) selection of build-up areas from the Copernicus High Resolution Imperviousness Degree layer

2) selection of transport routes relevant to the fragmentation geometry

3) deleting of tunnels from the transport routes

4) creating of buffers around the transport routes. A buffer size is dependent on the route class

6) erasing of build-up areas and the buffered transport routes from the seamless EEA39 territory layer

7) computation of meff values for each 1km sq reporting unit



References:

Jaeger, J. A.G.(2000): Landscape division, splitting index, and effective mesh size: New measures of landscape fragmentation. Landscape ecology 15(2), pp 115-130, http://link.springer.com/article/10.1023/A%3A1008129329289

Hierarchy level
Dataset

Reference System Information

Reference System Information

Code
EPSG:3035

Metadata

Metadata identifier
53bb9d36-0e28-4486-aa06-dc488671c84e

Language
English
Character encoding
UTF8
Contact
Organisation Individual Electronic mail address Website Role

European Environment Agency

sdi@eea.europa.eu

Point of contact

Type of resource

Resource type
Dataset
Metadata linkage

https://sdi.eea.europa.eu/catalogue/srv/api/records/53bb9d36-0e28-4486-aa06-dc488671c84e

Date info (Creation)
2018-04-23T07:02:39Z
Date info (Revision)
2025-10-09T10:50:39.526331Z

Metadata standard

Title

ISO 19115/19139

Edition

1.0

 
 
Access to the catalogue

Overviews

Spatial extent

Keywords

EEA topics

Agriculture and food Biodiversity Forests and forestry Land use
GEMET

animal corridor animal habitat built environment built-up area landscape
GEMET - INSPIRE themes, version 1.0

Habitats and biotopes Soil Transport networks
Spatial scope

European


Provided by

Access to the catalogue