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Research dossier · Places & Architecture

Aabach (Greifensee)

river in canton of Zürich, Switzerland

Architectural plans, a scale model, maps and brass measuring instruments
Places and architectureInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionSep 12, 2026
Entity authorityQ689956 ↗
Source-derived summary

The Aabach (also Aa, or Ustermer Aa for disambiguation with the Mönchaltorfer Aa) is a minor river in the canton of Zürich, Switzerland. At a length of 11.2 kilometres (7.0 mi), it flows from Pfäffikersee to the Greifensee. Its valley is known as

Aatal ("Aa Valley"), eponymous of the settlement Aathal.

Editorial summary

The public source identifies “Aabach (Greifensee)” as river in canton of Zürich, Switzerland. This brief keeps that definition visible, then builds a research path around Aabach, Greifensee and river.

Editorial reviewA valuable geographic starting point for tracing changing names, boundaries, uses and administrative responsibility. The current 51-word lead offers orientation but no explicit four-digit date, so chronology should not be assumed. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with Aabach, Greifensee and river providing the first useful test.
Editorial analysis

Why this record matters

A short description can identify a subject without explaining its stakes. For “Aabach (Greifensee)”, the useful work is to connect “river in canton of Zürich, Switzerland” to the records capable of establishing context and consequence.

Evidence profile

Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Sep 12, 2026. The linked authority identifier is Q689956. Authority coordinates are 47.352, 8.689. 2 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.

Critical limits

Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.

Best used for
  • Historic place names
  • Jurisdictional context
  • Routes into maps and plans
Verify next

Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.

Three-step research path

  1. Establish the record: confirm the title “Aabach (Greifensee)”, its source revision and the description used here.
  2. Expand the search: follow Aabach (Greifensee) primary sources, Aabach (Greifensee) archive and Aabach research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Aabach (Greifensee)”?
  2. What physical evidence or contemporary plan supports the description?
  3. Which earlier names or jurisdictions may reveal additional records?
Subject index

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Source & attribution

This entry incorporates text from “Aabach (Greifensee)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.