Remote Sensing Phase 1 Habitat Survey Update

Up-to-date habitat survey of Wales produced by analysis of remote sensing data. The dataset is comprised of contiguous habitat polygons classified into phase 1 categories. It is the product of a large scale remote sensing project aimed at updating the Phase 1 habitat survey carried out in Wales between 1979 and 1999. It was produced in order to have key dataset for Wales which can be used to inform the core work of former Countryside Council for Wales (CCW) and its partners, and map specialist habitats or interpretations of habitats. The maps will be checked through field visits and feedback from CCW staff with local knowledge.

Identifier: NRW_DS111197

Alternative Title

Phase 1 remote sensed.LYR
Synhwyro o bell - arolwg cynefinoedd Cam 1 - y diweddaraf

Metadata Language: English

Lineage: Remote sensing is basically any method of collecting information about objects such as lakes, trees, fields and habitat type 'from a distance' - in this case, predominantly by satellite images. Original source data is predominantly satellite images (see metadata entry 'Remote sensing image catalogue'). Other data was derived from aerial photographs and a range of other GIS data sources. A draft map has been produced for the whole of Wales. This has been broken down into 50 projects, eight of which have been refined and re-processed into phase 1 maps (this process will be ongoing subject to funding with the ultimate aim of completing all 50 projects thus having all Wales coverage). Production of the draft map began in 2006 and was completed by the end of the financial year 2007/08, however the training of the systems began in 2004/05. The re-processing of the 50 project areas should be completed over the next two years. A draft map for the whole of Wales has been produced to assess the quality of the general rule base. The rules were fine-tuned one project at a time to get the best local result and to allow quality checking. The images have been combined and analysed to derive an interpretation of the habitat type present. The appearance of habitats varies throughout the year therefore images were compared from different times of year to identify habitats by their characteristic pattern of phenological changes. A draft map of Wales was produced which was then divided into around 50 areas (known as projects) within which it is possible to apply the same interpretation to the colour information form a satellite image. A set of rules were created in a computer programme to interpret the images and determine habitat type present. Ground truth work has also been carried out in the field to calibrate and train the analytical systems to come up with the best interpretation of the habitat type. Maps will be merged using a method known as DS Belief Functions.

Dataset Reference Date (Publication): 2021-11-09

Temporal Extent

Begin date: 2004-01-01

End date: 2021-11-09

Topic category

Imagery base maps earth cover
Biota

Owner

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Originator

Countryside Council for Wales (CCW)

Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW

http://naturalresourceswales.gov.uk/splash?orig=/

Originator

Environment Systems Ltd

8G Vefn Llan Science Park, Aberystwyth, Ceredigion, SY23 3AH, Wales

http://www.envsys.co.uk/

Extent

Geographic Extent: Wales (WLS)

Format Type and Description

Geographic Information System ( )

Specification

GIS Layers

Data quality

Quality Scope: Dataset

Conformity: 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
Explanation
Degree: false

Lineage: Remote sensing is basically any method of collecting information about objects such as lakes, trees, fields and habitat type 'from a distance' - in this case, predominantly by satellite images. Original source data is predominantly satellite images (see metadata entry 'Remote sensing image catalogue'). Other data was derived from aerial photographs and a range of other GIS data sources. A draft map has been produced for the whole of Wales. This has been broken down into 50 projects, eight of which have been refined and re-processed into phase 1 maps (this process will be ongoing subject to funding with the ultimate aim of completing all 50 projects thus having all Wales coverage). Production of the draft map began in 2006 and was completed by the end of the financial year 2007/08, however the training of the systems began in 2004/05. The re-processing of the 50 project areas should be completed over the next two years. A draft map for the whole of Wales has been produced to assess the quality of the general rule base. The rules were fine-tuned one project at a time to get the best local result and to allow quality checking. The images have been combined and analysed to derive an interpretation of the habitat type present. The appearance of habitats varies throughout the year therefore images were compared from different times of year to identify habitats by their characteristic pattern of phenological changes. A draft map of Wales was produced which was then divided into around 50 areas (known as projects) within which it is possible to apply the same interpretation to the colour information form a satellite image. A set of rules were created in a computer programme to interpret the images and determine habitat type present. Ground truth work has also been carried out in the field to calibrate and train the analytical systems to come up with the best interpretation of the habitat type. Maps will be merged using a method known as DS Belief Functions.

Keywords

GEMET - INSPIRE themes, version 1.0

Habitats and biotopes

Type: Theme

Citation

Date (Publication): 2008-06-01

Code: geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus

remote sensing
satellite images
Phase 1 Survey (Phase I)
satellite remote sensing
habitat surveys (habitat monitoring)
imagery

Type: Theme

Citation

Date (Publication): 2024-06-19

Code: geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

NRW SMNR Keywords

Management Areas (SMNR)
Landscape (SMNR)
Sustainable Management of Natural Resources (SMNR)
Natural Resources (Incl. Features and Processes) (SMNR)
Physical Geography (Physiography) (SMNR)

Type: Theme

Citation

Date (Publication): 2024-06-26

Code: geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords

Code: British National Grid (EPSG::27700)

Content Information

NRW Profile

Custom Elements

Constraints

Limitations on Public Access and Use

Restriction type: Other restrictions

Access Constraints Directive

Limitations: no limitations

Access Constraints Text

Other constraints: The following data is considered OS derived data and is therefore jointly owned by NRW and the Ordnance Survey. NRW may release, publish or disseminate this data freely; providing recipients are made aware of use restrictions (See general use restrictions).

Use Constraints

Use constraints type: Other restrictions

Other constraints: © CNC/NRW and © Crown copyright 2014. All rights reserved. Natural Resources Wales, AC0000849444 Third parties seeking to re-use this data require a Licence issued by NRW. It allows re-use, reproduction and dissemination in any format or medium but only for non-commercial purposes, according to the terms and conditions of the Licence. Those seeking commercial re-use require a commercial licence available from the OS.

Metadata

File Identifier: 4f4c4942-4343-5764-6473-313131313937 XML

Metadata Language: English

Resource type: Dataset

Metadata Date: 2024-08-02T16:20:53.637Z

Metadata Standard Name: NRW

Metadata Standard Version: 1.0

pointOfContact

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Publishing Body

Access the portal

Full access to the portal and metadata.

Remote Sensing Phase 1 Habitat Survey Update

Identification

Temporal Extent

Extent

Extent

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

Keywords

Citation

Spatial Reference System

Content

Content Information

NRW Profile

Custom Elements

Constraints

Constraints

Limitations on Public Access and Use

Access Constraints Directive

Access Constraints Text

Use Constraints

Metadata

Metadata

Publishing Body