Census boundary evidence
Northfield — 1871 census geography (QC)
This page identifies a census boundary representation. Source-table records below retain their own reporting-unit identity and geographic qualifications.
- Map snapshot identifier
- QC093011_1871
- Source boundary identifier
- QC093011
- Census vintage
- 1871
- Source label
- Northfield
- Province code
- QC
- District label
- Ottawa Ouest
- Level
- csd
- Representation class
- E93_Presence
Census continuity group: Northfield
TCP UID: QC093011
Census source records
No source row has a supported or candidate endpoint here in the current assessment. This does not mean the population was zero.
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 |
|---|---|---|---|---|---|
| Northfield · 1861 | 1861 → 1871 | 135087850.244704 | 1.0 | 1.0 | APPROXIMATELY_EQUAL_EXTENTHistorical succession verified: False |
| Northfield · 1881 | 1871 → 1881 | 135087850.244704 | 1.0 | 1.0000000000000004 | APPROXIMATELY_EQUAL_EXTENTHistorical succession verified: False |
Continuity assessments
- Northfield (1861) → Northfield (1871): supported_spatial_name_continuity
- Northfield (1871) → Northfield (1881): supported_spatial_name_continuity