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High dimensional pixel composites from Earth observation time series

Created 19/11/2025

Updated 19/11/2025

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High-quality and large-scale image composites are increasingly important for a variety of applications. Yet a number of challenges still exist in the generation of composites with certain desirable qualities such as maintaining the spectral relationship between bands, reduced spatial noise, and consistency across scene boundaries so that large mosaics can be generated. We present a new method for generating pixel-based composite mosaics that achieves these goals. The method, based on a high-dimensional statistic called the `geometric median,' effectively trades a temporal stack of poor quality observations for a single high-quality pixel composite with reduced spatial noise. The method requires no parameters or expert-defined rules. We quantitatively assess its strengths by benchmarking it against two other pixel-based compositing approaches over Tasmania, which is one of the most challenging locations in Australia for obtaining cloud-free imagery. Citation: D. Roberts, N. Mueller and A. Mcintyre, "High-Dimensional Pixel Composites From Earth Observation Time Series," in IEEE Transactions on Geoscience and Remote Sensing, vol. 55, no. 11, pp. 6254-6264, Nov. 2017, doi: 10.1109/TGRS.2017.2723896

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Additional Info

Field Value
Title High dimensional pixel composites from Earth observation time series
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/en/dataset/0219521f-c753-4f3f-ba3e-ae58bebbbe65
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 28/07/2025
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        112.0,
        -44.0
      ],
      [
        154.0,
        -44.0
      ],
      [
        154.0,
        -9.0
      ],
      [
        112.0,
        -9.0
      ],
      [
        112.0,
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      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "High dimensional pixel composites from Earth observation time series". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/high-dimensional-pixel-composites-from-earth-observation-time-series1