Census boundary evidence
Ryley, VL — 1921 census geography (AB)
This page identifies a census boundary representation. Source-table records below retain their own reporting-unit identity and geographic qualifications.
- Map snapshot identifier
- AB198034_1921
- Source boundary identifier
- AB198034
- Census vintage
- 1921
- Source label
- Ryley, VL
- Province code
- AB
- District label
- Division No. 10
- Level
- csd
- Representation class
- E93_Presence
Census continuity group: Ryley, VL
TCP UID: AB198034
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.
- Ryley, VL — 1921 · 1921_V1T16, row 5276 unique_contextual_name_candidate
- Ryley — 1921 · 1921_V1T27, row 4809 unique_contextual_name_candidate
- Ryley — 1921 · 1921_V1T38, row 4809 unique_contextual_name_candidate
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 |
|---|---|---|---|---|---|
| 270 townships · 1911 | 1911 → 1921 | 0.27265081488120013 | 1.111376940402663e-11 | 1.0194055104413735e-07 | PARTIAL_OVERLAPHistorical succession verified: False |
| Ryley vl (T50 R17 MW4) · 1911 | 1911 → 1921 | 2674605.780470795 | 0.9999998700609105 | 0.9999998980594565 | APPROXIMATELY_EQUAL_EXTENTHistorical succession verified: False |
Continuity assessments
- Ryley vl (T50 R17 MW4) (1911) → Ryley, VL (1921): name_change_requires_review