Lost Person Search Area Prediction Based on Regression and Transfer Learning Models

• Main Authors: Ljiljana Šerić, Tomas Pinjušić, Karlo Topić, Tomislav Blažević
• Format: Article
• Language: English
• Published: MDPI AG 2021-02-01
• Series: ISPRS International Journal of Geo-Information
• Subjects: search and rescue; machine learning; regression; transfer learning; cellular automata simulation
• Online Access: https://www.mdpi.com/2220-9964/10/2/80

In this paper, we propose a methodology and algorithms for search and rescue mission planning. These algorithms construct optimal areas for lost person search having in mind the initial point of planning and features of the surrounding area. The algorithms are trained on previous search and rescue missions data collected from three stations of the Croatian Mountain Rescue Service. The training was performed in two training phases and having two data sets. The first phase was the construction of a regression model of the speed of walking. This model predicts the speed of walking of a rescuer who is considered a well-trained and motivated person since the model is fitted on a dataset made of GPS tracking data collected from Mountain Rescue Service rescuers. The second phase is the calibration of the model for lost person speed of walking prediction with transfer learning on lost person data. The model is used in the simulation of walking in all directions to predict the maximum area where a person can be located. The performance of the algorithms was analysed with respect to a small dataset of archive data of real search and rescue missions that was available and results are discussed.