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. 2022 Dec 8;12:21254. doi: 10.1038/s41598-022-25175-5

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Comparing the starting point of our results with high-precision population density dataset published by Worldpop. (a) is the heat map based on the starting point of the trajectory we generated (created by Gaode Map JS API, version 2.0, https://lbs.amap.com/api/jsapi-v2/summary). (b) is the heat map based on the population density dataset published by Worldpop. We have marked the area we generated with black dashed lines e.