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Table 5 Examples of application of dimension reduction methods towards SDGs using EO data

From: Monitoring sustainable development by means of earth observation data and machine learning: a review

SDGs

Field

Main finding

References

SGD 2 (Zero Hunger)

Agriculture

Partial Least Square Regression was applied with success, as a FS method, on crop yield estimation

[115]

The FS results demonstrated that the proposed Maximum Separability and Minimum Dependency method was more accurate than filter methods

[116]

SGD 6 (Clean Water and Sanitation)

Water resources

The proposed approach proved to be effective and accurate to assess water resources at catchment scale

[117]

Water Sources

Stepwise Discriminant Analysis and PCA improved the accuracy of water source recognition

[118]

SDG 7 (Affordable and Clean Energy)

Electricity

The proposed method improved the forecasting of electricity price and it was more accurate than the Independent Electricity System Operator prediction

[119]

SGD 9 (Industry, Innovation and Infrastructure)

Structural Reliability

The Bivariate Dimension Reduction Method proved to be effective for structural reliability analysis

[120]

SGD 11 (Sustainable Cities and Communities)

Land Cover

The results demonstrated that FS improves the classification accuracy of land cover classification

[121]

The proposed method demonstrates better results compared to other methods for land cover classification in almost all tests

[122]

Dimensionality Reduction was considered a key step in the land cover classification process

[123]

The experiments shown that the impervious surface extraction accuracy of Classification and Regression Tree was higher than Seperability and Thresholds algorithm

[124]

Land use

FS with Classification Optimisation Score metric reduces the processing time and produces higher classification accuracy for land use and land cover classification using VHR data

[125]

SDG 13 (Climate Action)

Pollution

The new Dimension Reduction method demonstrated to be a powerful approach to optimise the knowledge that emerges from atmospheric observations of N2O

[126]

SGD 15 (Life on Land)

Forest

Proposed a FS SVM-Recursive Feature Elimination method to explore the relationship between the biomass and parameters derived from Landsat-8 imagery. The results demonstrated that this method was able to accurately estimate the aboveground biomass.

[127]

Terrestrial ecosystem

FS methods allow the extraction of valuable information to create accurate maps of areas infested by invasive plant species

[128]