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Article

Fusion of Airborne LiDAR Point Clouds and Aerial Images for Heterogeneous Land-Use Urban Mapping

by 1,*, 1,† and 1,2,†
1
Department of Civil Engineering, Ryerson University, Toronto, ON M5B 2K3, Canada
2
Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editors: Jesús Balado Frías and Lucía Díaz-Vilariño
Remote Sens. 2021, 13(4), 814; https://doi.org/10.3390/rs13040814
Received: 19 January 2021 / Revised: 13 February 2021 / Accepted: 15 February 2021 / Published: 23 February 2021
(This article belongs to the Special Issue Aerial LiDAR Applications in Urban Environments)
The World Health Organization has reported that the number of worldwide urban residents is expected to reach 70% of the total world population by 2050. In the face of challenges brought about by the demographic transition, there is an urgent need to improve the accuracy of urban land-use mappings to more efficiently inform about urban planning processes. Decision-makers rely on accurate urban mappings to properly assess current plans and to develop new ones. This study investigates the effects of including conventional spectral signatures acquired by different sensors on the classification of airborne LiDAR (Light Detection and Ranging) point clouds using multiple feature spaces. The proposed method applied three machine learning algorithms—ML (Maximum Likelihood), SVM (Support Vector Machines), and MLP (Multilayer Perceptron Neural Network)—to classify LiDAR point clouds of a residential urban area after being geo-registered to aerial photos. The overall classification accuracy passed 97%, with height as the only geometric feature in the classifying space. Misclassifications occurred among different classes due to independent acquisition of aerial and LiDAR data as well as shadow and orthorectification problems from aerial images. Nevertheless, the outcomes are promising as they surpassed those achieved with large geometric feature spaces and are encouraging since the approach is computationally reasonable and integrates radiometric properties from affordable sensors. View Full-Text
Keywords: urban land-use; LiDAR-aerial integration; LiDAR-aerial geo-registration; LiDAR classification; supervised machine learning; maximum likelihood; support vector machines; neural networks; bootstrap aggregation; k-fold cross-validation urban land-use; LiDAR-aerial integration; LiDAR-aerial geo-registration; LiDAR classification; supervised machine learning; maximum likelihood; support vector machines; neural networks; bootstrap aggregation; k-fold cross-validation
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MDPI and ACS Style

Megahed, Y.; Shaker, A.; Yan, W.Y. Fusion of Airborne LiDAR Point Clouds and Aerial Images for Heterogeneous Land-Use Urban Mapping. Remote Sens. 2021, 13, 814. https://doi.org/10.3390/rs13040814

AMA Style

Megahed Y, Shaker A, Yan WY. Fusion of Airborne LiDAR Point Clouds and Aerial Images for Heterogeneous Land-Use Urban Mapping. Remote Sensing. 2021; 13(4):814. https://doi.org/10.3390/rs13040814

Chicago/Turabian Style

Megahed, Yasmine, Ahmed Shaker, and Wai Y. Yan. 2021. "Fusion of Airborne LiDAR Point Clouds and Aerial Images for Heterogeneous Land-Use Urban Mapping" Remote Sensing 13, no. 4: 814. https://doi.org/10.3390/rs13040814

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