**Last updated: Version 8/9.0 (June 2026)**
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**Scientific analysis based on the primary source:** Mildner, S. (2026). *Geodynamic Reinterpretation Model for Ptolemy's Germania Magna: General Model Description, Cartometric Foundations*, (v9.0). EarthArXiv (Preprint). [https://doi.org/10.31223/X5KB51](https://doi.org/10.31223/X5KB51)
([📥 **Download NEW-v9.0-PDF**](https://zenodo.org/records/20758648/files/Geodynamic_Model_Description_for_Ptolemys_Germania_Magna___eartharxiv__c9.0.pdf?download=1))
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***Disclaimer***
*This article is a technical companion piece summarising what is new in Version 8/9.0 of the model. It does not repeat the cartometric, geodynamic, or narrative arguments already presented in the articles listed below — those remain current and are not superseded. Version 9.0 adds three independent robustness checks (a control-region comparison, a sequential Bayesian re-analysis, and a formal statistical power assessment) plus a new monograph part that gives the Long-Transgression hypothesis an explicit falsifiability framework. The model has not been evaluated by peer review.*
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## Why a Fourth Layer of Robustness Checks?
The earlier articles on this site established the cartometric model (the affine baseline and the kinematic corrections), validated it with a formal out-of-sample blind test, and subjected it to a full statistical battery — AIC/BIC, leave-one-out cross-validation, bootstrap, permutation testing, and Moran's I. A subsequent update (v8.2) added an identification-multiverse analysis testing whether the result depends on which modern places are matched to which Ptolemaic names.
