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. 2022 Jun 7;12:9408. doi: 10.1038/s41598-022-13678-0

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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/.

PMC Copyright notice

Location of Zhanyi karst tiankeng group in Yunnan Province. The map at the top is from the ArcGIS 10.2 software (https://www.esri.com) by vector processing based on the administrative map. The map below is from remote sensing image obtained by United States Geological Survey (USGU, https://www.usgs.gov/), and preprocessed by ENVI 5.0 software (http://www.harrisgeospatial.com). These maps were merged by the Photoshop CS6 software (http://www.adobe.com) and marked the names of these tiankengs.