Identification info

Metadata Language

English (en)

Dataset Reference Date ()

2022-11-24

Identifier

http://data.bgs.ac.uk/id/dataHolding/13608017

Maintenance and update frequency

notApplicable

GEMET - INSPIRE themes

• Geology

BGS Thesaurus of Geosciences

• Imagery

• Volcanic activity

• Satellite imagery

Keywords

• NERC_DDC

Limitations on Public Access

otherRestrictions

Other constraints

licenceOGL

Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Use constraints

otherRestrictions

Other constraints

The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Spatial representation type

vector

Topic category

• Geoscientific information

Extent

TO

Dataset Reference Date ()

2009

Extent

TON

Dataset Reference Date ()

2009

Extent

TONGA [id=936000]

Dataset Reference Date ()

1979

Begin date

2017-04-01

End date

2022-04-30

 

Distribution Information

Data format

• Shapefile

  ()

 

Quality Scope

dataset

Other

dataset

Statement

The Sentinel-2 images used as input to the workflow comprised Level-1C image products. These are composed of 100 × 100 km2 tiles that are ortho-images in cartographic geometry according to the UTM/WGS84 projection, with radiometric corrections applied to convert each pixel value from the digital number (DN) to Top of Atmosphere (TOA) reflectance. We use median values within a month period, pending availability of the data due to cloud coverage. The remaining images have been thresholded based on the Normalized Difference Water Index (NDWI) is used to as a basis to discriminate between the land and sea based on their spectral characteristics. Methodology is described in detail in Novellino et al., (2021) at https://doi.org/10.3390/app10020536

Metadata

File identifier

f287da43-4913-77ff-e053-0937940a0d43 XML

Metadata Language

English (en)

Resource type

dataset

Metadata Date

2023-05-24

Metadata standard name

UK GEMINI

Metadata standard version

2.3