Census boundary evidence
Berthier — 1881 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
- QC086003_1881
- Source boundary identifier
- QC086003
- Census vintage
- 1881
- Source label
- Berthier
- Province code
- QC
- District label
- Berthier
- Level
- csd
- Representation class
- E93_Presence
Census continuity group: Berthier
TCP UID: QC086003
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.
- Berthier — 1881 · 1881_V1T1, row 1149 source_identifier_and_context_agree
- Berthier — 1881 · 1881_V3T24, row 1149 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 |
|---|---|---|---|---|---|
| Berthier · 1871 | 1871 → 1881 | 70621878.16070561 | 0.8934448765179297 | 1.0000000000000007 | LATER_WITHIN_EARLIERHistorical succession verified: False |
| Berthier · 1891 | 1881 → 1891 | 70621878.16070561 | 1.0000000000000007 | 1.0000000000000007 | APPROXIMATELY_EQUAL_EXTENTHistorical succession verified: False |
Continuity assessments
- Berthier (1871) → Berthier (1881): supported_continuity_with_area_separation
- Berthier (1881) → Berthier (1891): supported_spatial_name_continuity
Area separations
| Earlier area | Continuing area | Separate area | Retained fraction | Separated fraction | Comparison status |
|---|---|---|---|---|---|
| Berthier · 1871 | Berthier · 1881 | Isle du Pad | 0.8934448765179297 | 0.1065551234820707 | later_totals_require_geographic_reconciliation |
People and biographical connections
These published connections come from the separate LINCS / Dictionary of Canadian Biography layer. A life event or overlapping lifespan does not establish residence at a census date. The association remains attached to this published page; it is not assigned to every revised census group.
| Name | Lifespan | Connection |
|---|---|---|
| Abraham Joseph | 1815–1886 | born here |
| Jacques Grenier | 1823–1909 | born here |
| Joseph Alfred Mousseau | 1838–1886 | born here |
| Gualbert Gervais | 1844–1888 | born here |
| Alphonse Lavallée-Smith | 1873–1912 | born here |
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.