91st meridian east
line of longitude east of the Greenwich Meridian
The meridian 91° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole.
The 91st meridian east forms a great ellipse with the 89th meridian west.
Begin with the source’s own compact description: “91st meridian east” is line of longitude east of the Greenwich Meridian. The dossier treats that line as a proposition to test through 91st, meridian and east, not as a finished interpretation.
Why this record matters
The phrase “line of longitude east of the Greenwich Meridian” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jul 1, 2025. The linked authority identifier is Q2702802. Authority coordinates are 0.000, 91.000. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. 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
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
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- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “91st meridian east”, its source revision and the description used here.
- Expand the search: follow 91st meridian east primary sources, 91st meridian east archive and 91st research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “91st meridian east”?
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This entry incorporates text from “91st meridian east” 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.