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Criteria of potential forest area of the research area_
| Criterion | Attribute values A | Ranking of criteria | Weighting w |
|---|---|---|---|
| Extent of forests on the Schrötter map | 1 | 1 | 0.33 |
| Extent of wetlands based on the Schrötter map and maps of Polish wetlands | 1 | 2 | 0.27 |
| Extent of modern forests | 1 | 3 | 0.20 |
| Wetness index (SAGA WI) | 1 | 4 | 0.13 |
| Relative altitudes | 1 | 5 | 0.07 |
| Sum: | 1.00 | ||
| Hypothetical extent of agricultural land | −1 | 1 | 0.50 |
| Soils favourable to agriculture | −1 | 2 | 0.33 |
| Density of archaeological sites | −1 | 3 | 0.17 |
| Sum: | 1.00 | ||
Variants of the hypothetical forest area in 13th-century Chełmno Land_
| Grade of classification as forest area | Surface | Share in the area | Variant A sum | Variant B sum |
|---|---|---|---|---|
| [km2] | [%] | |||
| 8 | 77 | 3 | 16 | 28 |
| 7 | 119 | 4 | ||
| 6 | 238 | 9 | ||
| 5 | 329 | 12 | 22 | |
| 4 | 276 | 10 | 72 | |
| 3 | 507 | 18 | 62 | |
| 2 | 379 | 14 | ||
| 1 | 840 | 30 | ||