Methodology
Evidence classes and geometric authority.
| Class | Meaning |
|---|---|
| A_DOCUMENTED | Direct documentary or plan evidence. |
| B_CORROBORATED | Supported by more than one independent historical constraint. |
| C_PHOTO_CONSTRAINED | Geometry constrained by photographs/model imagery but not fully measured. |
| D_TYPOLOGICAL | Historically plausible typological completion. |
| E_SPECULATIVE | Explicit hypothesis; disabled by default. |
The DGM lineage is Geobasis NRW DGM1 in EPSG:25832. The project uses a rigid plan→UTM transform with θ −67.501905459681°, E0 475837.94729828, N0 5717404.89147737 and scale 1.0. Row 0 of the raster is north and sampling uses the 5 m cell-centre convention.
OSM residuals are not forced to zero; the historical plan geometry is not warped to improve apparent fit. Historical North/East/West tower anchors remain fixed.
DOES NOT PROVE: a reconstructed feature was executed exactly as modelled, that planning documents formed one immutable masterplan, or that topographic fit resolves historical intent.