Anthromes 12K DGG (V1) analysis code and R research compendium

This R research compendium reproduces all the analyses and non-map visualizations in the paper Ellis et al. (2021). \"People have shaped most of terrestrial nature for at least 12,000 years\". Proceedings of the National Academy of Sciences, doi:10.1073/pnas.2023483118. It contains scripts and R Markdown vignettes for generating the hexagonal discrete global grid system, extracting HYDE3.2 data layers, applying the anthrome classification algorithm, and analyzing and visualizing the results. The analysis.rmd contains the source code for the main analyses in the paper, while the DGG_preparation.rmd and anthrome_classification.rmd files include the computationally intensive preprocessing steps. Refer to the included README file for details of the compendium structure and directions for running the compendium on your local computer. Raw, intermediate, and output data from this analysis are available as the \"Anthromes 12K DGG (V1) Full Dataset\" at doi:10.7910/DVN/E3H3AK. For a more up-to-date version of this codebase including additional features, performance improvements, and documentation, please refer to the associated R package at https://github.com/nick-gauthier/anthromes.

本R语言研究汇编复现了Ellis等人（2021）发表于《美国国家科学院院刊》（*Proceedings of the National Academy of Sciences*，DOI:10.1073/pnas.2023483118）的论文《人类至少在12000年前便已塑造了绝大多数陆地自然生态系统》中的全部分析与非地图类可视化内容。
本汇编包含用于生成六边形离散全球网格系统（hexagonal discrete global grid system）、提取HYDE3.2数据图层、应用人类生态系统（anthrome）分类算法，以及对分析结果进行可视化的脚本与R Markdown vignettes文档。
其中`analysis.rmd`包含论文核心分析的源代码，而`DGG_preparation.rmd`与`anthrome_classification.rmd`文件则涵盖了计算密集型的预处理步骤。
如需了解本汇编的结构详情与本地运行指南，请参阅随附的README文件。
本分析所用的原始数据、中间数据与输出数据均以"Anthromes 12K DGG (V1) Full Dataset"的形式发布，DOI为10.7910/DVN/E3H3AK。
如需获取包含新增功能、性能优化与补充文档的本代码库更新版本，请访问关联的R语言包仓库：https://github.com/nick-gauthier/anthromes。