Census boundary evidence
Middle Londonderry — 1881 census geography (NS)
This page identifies a census boundary representation. Source-table records below retain their own reporting-unit identity and geographic qualifications.
- Map snapshot identifier
- NS019004_1881
- Source boundary identifier
- NS019004
- Census vintage
- 1881
- Source label
- Middle Londonderry
- Province code
- NS
- District label
- Colchester
- Level
- csd
- Representation class
- E93_Presence
Census continuity group: Middle Londonderry
TCP UID: NS019004
Census source records
Each link states the assessment that connected the source row to this map. Name candidates remain candidates; no source statistic is silently assigned to the map.
- Middle Londonderry — 1881 · 1881_V1T1, row 303 source_identifier_and_context_agree
- Middle Londonderry — 1881 · 1881_V3T24, row 303 source_identifier_and_context_agree
Boundary intersections across censuses
These are computed polygon intersections in the equal-area CRS ESRI:102001. Fractions describe the area of the earlier and later polygons, respectively. They do not establish historical succession, and population has not been apportioned by area. All positive intersections are retained, including very small contributions.
| Other census representation | Years (earlier → later) | Overlap (m²) | Fraction of earlier area | Fraction of later area | Evidence |
|---|---|---|---|---|---|
| Lower Londonderry · 1871 | 1871 → 1881 | 60422617.52071957 | 0.2489022127882343 | 0.35081322925061037 | PARTIAL_OVERLAPHistorical succession verified: False |
| Upper Londonderry · 1871 | 1871 → 1881 | 111813240.43079312 | 0.3361760541756001 | 0.6491867707493898 | PARTIAL_OVERLAPHistorical succession verified: False |
| Acadia Mines W-O · 1891 | 1881 → 1891 | 32449020.75745719 | 0.18839875240492687 | 1.000000000000001 | LATER_WITHIN_EARLIERHistorical succession verified: False |
| Acadia Mines E · 1891 | 1881 → 1891 | 22111903.075994965 | 0.1283815306463062 | 1.0000000000000004 | LATER_WITHIN_EARLIERHistorical succession verified: False |
| Middle Londonderry · 1891 | 1881 → 1891 | 117674934.11806048 | 0.6832197169487668 | 0.9999999999999997 | LATER_WITHIN_EARLIERHistorical succession verified: False |
Continuity assessments
- Middle Londonderry (1881) → Middle Londonderry (1891): supported_continuity_with_area_separation
Area separations
| Earlier area | Continuing area | Separate area | Retained fraction | Separated fraction | Comparison status |
|---|---|---|---|---|---|
| Lower Londonderry · 1871 | Lower Londonderry · 1881 | Middle Londonderry | 0.7510977872117651 | 0.2489022127882343 | later_totals_require_geographic_reconciliation |
| Upper Londonderry · 1871 | Upper Londonderry · 1881 | Middle Londonderry | 0.6638239458243992 | 0.3361760541756001 | later_totals_require_geographic_reconciliation |
| Middle Londonderry · 1881 | Middle Londonderry · 1891 | Acadia Mines W-O | 0.6832197169487668 | 0.1883987524049268 | approximately_common_geography_subject_to_variable_and_source_review |
| Middle Londonderry · 1881 | Middle Londonderry · 1891 | Acadia Mines E | 0.6832197169487668 | 0.1283815306463062 | approximately_common_geography_subject_to_variable_and_source_review |
Individual records from the 1881 census
The individual census transcription is a separate dataset. Existing person citation anchors and the published geographic grouping are preserved. These records are not population totals derived from the rebuilt aggregate tables.