Habitat maps from surveys

 

This page provides information about the "Habitat maps from surveys" layers shown on the EMODnet Seabed Habitats interactive map.

EUNIS classification system

EUNIS Habitat maps

The EUNIS Habitat maps  layer is a compilation of habitat maps from surveys in the EMODnet Seabed Habitats project area that contain habitat data in the EUNIS classification system. Surveys previously submitted to the long-running MESH and MESH Atlantic projects have also been included within this dataset.

 

It is worked on constantly and updated periodically with data submitted voluntarily to EMODnet Seabed Habitats through the contributing data process. If you have habitat data which you would like to display on EMODnet Seabed Habitats, please follow the data submission process.

 

The data are separated into three rough scale categories: Broad, Medium and Fine.

  • Broad scale maps reflect coarse-resolution habitat maps that should be viewed at larger scales. They are visible between the scales of 1:433k and 1:7M.
  • Medium scale maps reflect moderate-resolution habitat maps that can be viewed at scales smaller than broad scale maps. They are visible between the scales of 1:100k and 1:900k.
  • Fine scale maps reflect detailed habitat maps that can be viewed at small scales. They are visible between the scales under 1:217k.

 

Outside of their visible scales, the study area bounding boxes of the maps will be displayed to aid the user in determining potential data coverage.

 

Where there are overlapping mapping studies, the MESH confidence assessment system is used to determine which is shown on top. 

 

These three layers are available to download in ESRI Shapefile format from the download page.

EUNIS - Confidence in habitat maps

The Confidence in habitat maps layer is made up of outlines of habitat mapping studies (same layer as Study Areas) linked to a database of confidence assessment scores. An important part of the MESH process was to focus on the integrity of existing maps and to encourage an honest, open approach to assessing the suitability of each map to the intended purpose.  The project developed a ‘confidence assessment methodology’ where the evaluation process addresses three main questions which remain in use by EMODnet Seabed Habitats:


1. How good is the remote sensing?
2. How good is the ground truthing?
3. How good is the data interpretation?

 

These questions were selected because MESH promoted the creation of habitat maps through the interpretation of remote sensing data and ground truthing data. Each question contains several factors, with each factor being given a score between 0 and 3 according to the MESH confidence assessment guidelines. The Confidence assessment map layer presents the overall confidence rating for each map so that end-users can determine their adequacy for decision-making. The layer is coloured using the following thresholds (x = overall confidence rating as a percentage):

      
Confidence Range (%) Confidence Level Explanation
0 < x ≤ 20  Very low confidence -
20 < x ≤ 37 Low confidence Upper limit is the highest possible score for maps that use only physical ground truthing data
37 < x ≤ 58 Moderate confidence Upper limit is the highest possible score for maps that use only physical and biological ground truthing data.
58 < x ≤ 79 High confidence Upper limit is the highest possible score for maps that use only physical ground truthing and remote sensing data.
79 < x ≤ 100 Very high confidence Maps with confidence scores higher than 79 % definitely include biological ground truthing and remote sensing data.

 

Full details of the MESH confidence assessment guidelines can be downloaded here.

 

EUNIS - Bounding boxes

This layer shows the geographic bounding boxes of EUNIS habitat maps held by EMODnet Seabed Habitats. The data are coloured by scale:

  • Blue for broad scale.
  • Green for medium scale.
  • Red for fine scale.

 

Using the Info tools displays further information about the study and gives a hyperlink to its entry in the  metadata catalogue.

 

The Bounding boxes map layers are available at all map scales.

 

EUNIS - Sample points (UK)

The Samples Points (UK) map layer is an extract of the UK Marine Recorder benthic sample database, which is maintained and updated by JNCC. This layer was generated as part of the MESH Project from the sample points collected and analysed by the Marine Nature Conservation Review (MNCR) surveys, since then more data has been added to the Marine Recorder database, which is updated periodically. Users can query the points with the Info for point tool to view additional information about the sample point as well as to return details about the survey in which the sample was collected. The information boxes also show seabed photographs where the points relate to those sample data that were collated by the MESH project. The photographs are stills taken from video transects carried out by Envision Mapping Ltd over a 12 year period and analysed as part of the MESH Project.

 

The Habitat Samples Points (UK) is not downloadable directly; however, the Marine Recorder Snapshot, from which it is derived can be downloaded from the JNCC website.

 

Other classification systems

Other maps - Habitat maps (various classifications)

The Other Habitat maps  layer is a compilation of habitat maps from surveys in the EMODnet Seabed Habitats project area that contain habitat data in classification systems other than the European standard EUNIS. Surveys previously submitted to the long-running MESH and MESH Atlantic projects have also been included within this dataset.

 

It is worked on constantly and updated periodically with data submitted voluntarily to EMODnet Seabed Habitats through the contributing data process. If you have habitat data which you would like to display on EMODnet Seabed Habitats, please follow the data submission process.

 

The data are separated into three rough scale categories: Broad, Medium and Fine.

  • Broad scale maps reflect coarse-resolution habitat maps that should be viewed at larger scales. They are visible between the scales of 1:433k and 1:7M.
  • Medium scale maps reflect moderate-resolution habitat maps that can be viewed at scales smaller than broad scale maps. They are visible between the scales of 1:100k and 1:900k.
  • Fine scale maps reflect detailed habitat maps that can be viewed at small scales. They are visible between the scales under 1:217k.

 

Outside of their visible scales, the study area bounding boxes of the maps will be displayed to aid the user in determining potential data coverage.

 

Where there are overlapping mapping studies, the MESH confidence assessment system is used to determine which is shown on top. 

 

These three layers are available to download in ESRI Shapefile format from the download page.

Other maps - Confidence in habitat maps

This layer is equivalent to the "EUNIS - Confidence in habitat maps" layer, but for non-EUNIS habitat maps.

 

Other maps - Bounding boxes

This layer is equivalent to the "EUNIS - Bounding boxes" layer, but for non-EUNIS habitat maps.

 

 

EU Habitats Directive Annex I

Habitats Directive Annex I habitat maps

The Habitats Directive Annex I habitat maps  layer is a compilation of habitat maps from surveys in the EMODnet Seabed Habitats project area that contain habitat data relating to those habitats described in Annex I of the EU's Habitats Directive.

 

It is worked on constantly and updated periodically with data submitted voluntarily to EMODnet Seabed Habitats through the contributing data process. If you have habitat data which you would like to display on EMODnet Seabed Habitats, please follow the data submission process.

 

Outside of the appropriate viewing scale, the study area bounding boxes of the maps will be displayed to aid the user in determining potential data coverage.

 

Other maps - Confidence in habitat maps

This layer is equivalent to the "EUNIS - Confidence in habitat maps" layer, but for non-EUNIS habitat maps.

 

 

Study area bounding boxes

This layer shows the study area bounding boxes for the habitat maps collated under the  Habitats Directive Annex I habitat maps  layer.

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