Identification

Title

LiDAR for Outer Hebrides 2019 - 25cm DTM

Abstract

A lidar survey of the Outer Hebrides was commissioned by the Scottish Environment Protection Agency (SEPA) to improve the topographic data available for modelling coastal and surface water flood risk. The aerial survey was carried out by Bluesky International Ltd. between June and September 2019. The point cloud data was captured at 16 points per square metre (ppm) and processed by Bluesky using the OSGM15 geoid model, OSTN15 horizontal transformation and Newlyn datum. The whole Outer Hebrides survey area had 11 ground control areas with RMSE values from 0.020m to 0.097m. The data is available as open data under an Open Government Licence. The 25 cm resolution data covers approximately 200 km² of the main settlement areas, including Stornoway. This dataset reflects the Digital Terrain Model (DTM) produced from the point cloud data.

Resource type

dataset

Resource locator

https://srsp-ows.jncc.gov.uk/ows?service=wms&version=1.3.0&request=GetCapabilities

protocol: OGC:WMS

function: information

https://remotesensingdata.gov.scot/data#/list?lidar/outerheb-2019

protocol: WWW:LINK-1.0-http--link

description: Digital Terrain Model (DTM) Download Service

function: download

https://remotesensingdata.gov.scot/

protocol: WWW:LINK-1.0-http--link

description: Scottish Remote Sensing Portal

function: search

Unique resource identifier

code

SEPA_OUTER_HEBRIDES_LIDAR_2019_25CM_DTM

codeSpace

www.gov.scot

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

imageryBaseMapsEarthCover

elevation

Keywords

Keyword set

keyword value

Orthoimagery

Elevation

originating controlled vocabulary

title

GEMET - INSPIRE themes, version 1.0

reference date

date type

publication

effective date

2008-06-01

Geographic location

West bounding longitude

-8.88

East bounding longitude

-5.58

North bounding latitude

59.14

South bounding latitude

56.74

Extent

Extent group

authority code

code identifying the extent

Vertical extent information

Minimum value

-4.3819999694824

Maximum value

185.81300354004

Coordinate reference system

authority code

code identifying the coordinate reference system

http://www.opengis.net/def/crs/EPSG/0/5701

Temporal reference

Temporal extent

Begin position

2019-06-07

End position

2019-09-21

Dataset reference date

date type

creation

effective date

2021-04-01

Frequency of update

notPlanned

Quality and validity

Lineage

Commissioned by SEPA in 2019, the contract was awarded to Bluesky International Ltd. who conducted and processed the data. Airborne LiDAR was collected between June and September 2019 for 200 km². The point density was a minimum of 16 points/sqm. By Feb 2020 Bluesky had delivered raw LAS files alongside Digital Terrain and Digital Surface Models at 25cm resolution (ASCII format). A survey report was provided detailing the accuracy of the data captured.

Conformity

Conformity report

specification

title

reference date

date type

publication

effective date

2010-12-08

degree

false

explanation

Data format

name of format

WMS

version of format

1.0

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Responsible organisations

Responsible party

organisation name

Scottish Environment Protection Agency

full postal address

Strathallan House, Castle Business Park

Stirling

FK9 4TZ

United Kingdom

email address

foi@sepa.org.uk

responsible party role

owner

Metadata on metadata

Metadata point of contact

organisation name

Scottish Environment Protection Agency

full postal address

Strathallan House, Castle Business Park

Stirling

FK9 4TZ

United Kingdom

email address

foi@sepa.org.uk

responsible party role

pointOfContact

Metadata date

2021-07-12T09:36:27

Metadata language

eng