Digital Earth Australia Analysis Ready and Derivative Data Collection  

Authors / CoAuthors

Abstract

Analysis Ready Data (ARD) takes medium resolution satellite imagery captured over the Australian continent and corrects for inconsistencies across land and coastal fringes. The result is accurate and standardised surface reflectance data, which is instrumental in identifying and quantifying environmental change. This product is a single, cohesive ARD package, which allows you to analyse surface reflectance data as is, without the need to apply additional corrections. ARD consists of sub products, including : 1) NBAR Surface Reflectance which produces standardised optical surface reflectance data using robust physical models which correct for variations and inconsistencies in image radiance values. Corrections are performed using Nadir corrected Bi-directional reflectance distribution function Adjusted Reflectance (NBAR). 2) NBART Surface Reflectance which performs the same function as NBAR Surface Reflectance, but also applies terrain illumination correction. 3) OA Observation Attributes product which provides accurate and reliable contextual information about the data. This 'data provenance' provides a chain of information which allows the data to be replicated or utilised by derivative applications. It takes a number of different forms, including satellite, solar and surface geometry and classification attribution labels. ARD enables generation of Derivative Data and information products that represent biophysical parameters, either summarised as statistics, or as observations, which underpin an understanding of environmental dynamics. The development of derivative products to monitor land, inland waterways and coastal features, such as: - urban growth - coastal habitats - mining activities - agricultural activity (e.g. pastoral, irrigated cropping, rain-fed cropping) - water extent Derivative products include: - Water Observations from Space (WOfS) - National Intertidal Digital Elevation Model (NIDEM) - Fractional Cover (FC) - Geomedian ARD and Derivative products are reproduced through a period collection upgrade process for each sensor platform. This process applied improvements to the algorithms and techniques and benefits from improvements applied to the baseline data that feeds into the ARD production processes. <b>Value: </b>These data are used to understand distributions of and changes in surface character, environmental systems, land use. <b>Scope: </b>Australian mainland and some part of adjacent nations. Access data via the DEA web page - <a href="https://www.dea.ga.gov.au/products/baseline-data">https://www.dea.ga.gov.au/products/baseline-data</a>

Product Type

collection

eCat Id

144688

Contact for the resource

Keywords

theme.ANZRC Fields of Research.rdf

• EARTH SCIENCES

( {1} )

• HVC_144688

( {1} )

• HVC - High Value Collection

( {1} )

• DC2020

( {1} )

• NCI

( {1} )

• Satellite

( {1} )

• Surface Reflectance

( {1} )

• WofS

( {1} )

• NIDEM

( {1} )

• Landsat

( {1} )

• Sentinel

( {1} )

• Hotspots

( {1} )

• DEA

( {1} )

• Digital Earth Australia

( {1} )

• Published_External

Publication Date

2021-10-27T05:13:17

Creation Date

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

Status

onGoing

Purpose

These data are used to understand distributions of and changes in surface character, environmental systems, land use.

Maintenance Information

annually

Topic Category

geoscientificInformation

Series Information

Lineage

<b>Source: </b>Computed by Geoscience Australia (GA) staff using data from the US Geological Survey's Landsat program, the Copernicus program and it’s range of Sentinel satellites (1,2 and 3), as well as NASA’s Terra and Aqua missions.<br /> <br /> <b>Form: </b>NetCDF4, GeoTIFF <br /> <br /> This Collection record was created to enhance the discoverability and management of the individual products contained in the collection. See the individual eCat records for product specific lineage.

Parent Information

Extents

[-44.00, -9.00, 112.00, 154.00]

Reference System

Spatial Resolution

Service Information

Associations

Association Type - wasDerivedFrom

Digital Earth Australia Landsat Data Collection    

eCat Identifier - 144643,

UUID - f0864320-ccbc-49d0-b0a4-339e09896ca0

Downloads and Links

Source Information