Census boundary evidence
St. Thomas de Pierreville — 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
- QC057004_1881
- Source boundary identifier
- QC057004
- Census vintage
- 1881
- Source label
- St. Thomas de Pierreville
- Province code
- QC
- District label
- Yamaska
- Level
- csd
- Representation class
- E93_Presence
Census continuity group: St. Thomas de Pierreville
TCP UID: QC057004
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.
- St. Thomas de Pierreville — 1881 · 1881_V1T1, row 840 source_identifier_and_context_agree
- St. Thomas de Pierreville — 1881 · 1881_V3T24, row 840 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 |
|---|---|---|---|---|---|
| Pierreville · 1871 | 1871 → 1881 | 95593460.81538069 | 0.9999999999999949 | 0.9999999999999949 | APPROXIMATELY_EQUAL_EXTENTHistorical succession verified: False |
| Pierreville & Abenakis, Villages · 1891 | 1881 → 1891 | 1204980.4627955314 | 0.012605260365274353 | 1.0 | LATER_WITHIN_EARLIERHistorical succession verified: False |
| St. Elphège · 1891 | 1881 → 1891 | 22346799.902761277 | 0.23376912722010826 | 0.5258607151042104 | PARTIAL_OVERLAPHistorical succession verified: False |
| St. Thomas de Pierreville · 1891 | 1881 → 1891 | 72041680.44982399 | 0.7536256124146133 | 0.9999999999999998 | LATER_WITHIN_EARLIERHistorical succession verified: False |
Continuity assessments
- Pierreville (1871) → St. Thomas de Pierreville (1881): name_change_requires_review
- St. Thomas de Pierreville (1881) → St. Thomas de Pierreville (1891): supported_continuity_with_area_separation
Area separations
| Earlier area | Continuing area | Separate area | Retained fraction | Separated fraction | Comparison status |
|---|---|---|---|---|---|
| St. Thomas de Pierreville · 1881 | St. Thomas de Pierreville · 1891 | Pierreville & Abenakis, Villages | 0.7536256124146133 | 0.0126052603652743 | later_totals_require_geographic_reconciliation |
| St. Thomas de Pierreville · 1881 | St. Thomas de Pierreville · 1891 | St. Elphège | 0.7536256124146133 | 0.2337691272201082 | later_totals_require_geographic_reconciliation |
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.