My GeoNetwork catalogue
DEA GeoMAD (Landsat 8 OLI-TIRS)
DEA Geometric Median and Median Absolute Deviation (Landsat 8 OLI-TIRS)
This product provides statistical tools to exploit the time series of Earth Observation data available in Digital Earth Australia, providing annual images of general conditions and how much an area changes for a given year.
The geomedian part of the product provides an "average" cloud-free image over the given year. The geomedian image is calculated with a multi-dimensional median, using all the spectral measurements from the satellite imagery at the same time in order to maintain the relationships among the measurements.
The median absolute deviation part of the product uses three measures of variance, each of which provides a 'second order' high dimensional statistical composite for the given year. The three variance measures show much an area varies from the "average" in terms of 'distance' based on factors such as brightness and spectra:
Euclidean distance (EMAD)
Cosine (spectral) distance (SMAD)
Bray Curtis dissimilarity (BCMAD)
Together, they provide information on variance in the landscape over the given year and are useful for change detection applications.
For more information, see https://docs.dea.ga.gov.au/data/product/dea-geometric-median-and-median-absolute-deviation-landsat/
For service status information, see https://status.dea.ga.gov.au
Simple
Identification info
- Status
Point of contact
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
Extent
))
- Maintenance and update frequency
- As needed
- Keywords (Theme)
-
- mangrove
- australia
- geomedian
- WOfS
- time-series
- landsat
- HLTC
- bare-earth
- burn characteristics
- NIDEM
- fractional-cover
- Keywords (Place)
-
- World
Resource constraints
- Access constraints
- Other restrictions
- Other constraints
- no conditions apply
Resource constraints
- Use limitation
- no conditions apply
Resource constraints
- Use limitation
- https://creativecommons.org/licenses/by/4.0
- Access constraints
- Licence Unrestricted
- Use constraints
- Licence Unrestricted
- Language
- English
- Character encoding
- UTF8
Distribution Information
- OnLine resource
-
ga_ls8c_nbart_gm_cyear_3
DEA GeoMAD (Landsat 8 OLI-TIRS)
Resource lineage
- Hierarchy level
- Dataset
Metadata
- Metadata identifier
- urn:uuid/f00ab50a7d7b4d9eb1b3594209a689f2964fa451
- Language
- English
- Character encoding
- anyValidURI
Point of contact
Point of contact
Type of resource
- Resource scope
- Dataset
Metadata linkage
- Function
- Complete Metadata
- Metadata linkage
- http://portal.auscope.org/geonetwork/srv/api/records/177abe2c-9efe-4fd2-a66e-0f1e099c3047
- Date info (Revision)
- 2022-10-25T02:20:38
- Date info (Creation)
- 2024-01-22T22:38:11
Metadata standard
- Title
- ISO 19115-3
Overviews
Spatial extent
Provided by
