Production Date of Each Version

2022-08-01 Produced the 2020 administrative-division vector data, CTAmap version 1.0.1

2022-08-18 Produced the 2021 administrative-division vector data and corrected related errors, CTAmap version 1.0.2

2022-08-31 Produced the 2022 administrative-division vector data, CTAmap version 1.0.3

2022-12-21 Produced the 2019 administrative-division vector data and corrected related errors, CTAmap version 1.0.4

2022-12-22 Produced the 2018 administrative-division vector data, CTAmap version 1.0.5

2022-12-23 Produced the 2017 administrative-division vector data, CTAmap version 1.0.6

2022-12-24 Produced the 2016 administrative-division vector data, CTAmap version 1.0.7

2022-12-30 Produced the early-2015 administrative-division vector data, CTAmap version 1.0.8

2023-1-2 Produced the end-of-2022 administrative-division vector data, CTAmap version 1.0.9

2023-1-31 Produced the 2014 administrative-division data, CTAmap version 1.0.10

2023-2-12 Produced the 2013 administrative-division data and corrected related errors, CTAmap version 1.0.11

2023-10-15 Summarized relevant feedback and modified the data, CTAmap version 1.1

2024-11-21 Updated the early-2009 to early-2024 version and released CTAmap version 1.2

2025-04-25 Produced the early-2000 to early-2008 version, updated the 2009 to early-2024 data, and released CTAmap version 1.3

Acknowledgements

Thanks to netizen gou and Wang Yanjun (王艳君), a student at Southwest Jiaotong University (西南交通大学), for their help in producing this dataset.