Census boundary evidence
Isle aux Grues — 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
- QC163008_1871
- Source boundary identifier
- QC163008
- Census vintage
- 1871
- Source label
- Isle aux Grues
- Province code
- QC
- District label
- Montmagny
- Level
- csd
- Representation class
- E93_Presence
Census continuity group: Isle aux Grues
TCP UID: QC163008
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.
- Isle aux Grues — 1871 · 1871_V1T1, row 1219 source_identifier_and_context_agree
- Isle aux Grues — 1871 · 1871_V3T23, row 1219 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 |
|---|---|---|---|---|---|
| Grosse Isle · 1861 | 1861 → 1871 | 1830209.4548526644 | 1.0000000000000004 | 0.06301904692688744 | EARLIER_WITHIN_LATERHistorical succession verified: False |
| Isle aux Grues · 1861 | 1861 → 1871 | 8315466.758472842 | 1.0000000000000002 | 0.28632394422492935 | EARLIER_WITHIN_LATERHistorical succession verified: False |
| Isle aux Oies · 1861 | 1861 → 1871 | 17051007.598075543 | 1.0000000000000009 | 0.587112171847205 | EARLIER_WITHIN_LATERHistorical succession verified: False |
| Isle aux Canots · 1861 | 1861 → 1871 | 507167.5480551122 | 1.0 | 0.017463146322371337 | EARLIER_WITHIN_LATERHistorical succession verified: False |
| Isle Ste Marguerite · 1861 | 1861 → 1871 | 1338311.9880157951 | 1.0000000000000004 | 0.04608169067860754 | EARLIER_WITHIN_LATERHistorical succession verified: False |
| Ile aux Grues · 1881 | 1871 → 1881 | 29042163.34747194 | 1.0000000000000002 | 1.0000000000000002 | APPROXIMATELY_EQUAL_EXTENTHistorical succession verified: False |
Continuity assessments
- Isle aux Grues (1871) → Ile aux Grues (1881): name_change_requires_review