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  1. xdem_nk_bias_coupling xdem_nk_bias_coupling Public

    Minimal reproduction on xDEM's bundled example DEMs: a single NuthKaab fit returns an affine shift contaminated by elevation-dependent bias, scaling with bias magnitude - and invisible in the align…

    Jupyter Notebook

  2. nuth-and-kabb-coupling nuth-and-kabb-coupling Public

    Nuth & Kaab (2011) DEM coregistration implemented from scratch - characterising the coupling between its two correction steps, and why alternating to convergence removes it.

    Jupyter Notebook

  3. high-alpine-dsm-dtm-difference-study high-alpine-dsm-dtm-difference-study Public

    DSM - DTM difference over high-alpine glacier terrain (Weisshorn, swisstopo). Includes a public retraction of the original conclusion and a post-mortem on why it did not hold.

    Jupyter Notebook

  4. gpx-audit gpx-audit Public

    Deterministic audit layer for GPX tracks - makes timestamp, sampling and motion anomalies explicit as schema-versioned JSON. Observes, never corrects.

    JavaScript