hemisphere of the Earth
Let an agent explain the hemispheres of the Earth and how they are defined, relay their geography, seasons and climate from reference sources, describe cartographic and cultural uses, and distinguish geographic hemispheres from celestial hemispheres and from political usages such as the Western Hemisphere in diplomacy.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain the hemispheres of the Earth and how they are defined, relay their geography, seasons and climate from reference sources, describe cartographic and cultural uses, and distinguish geographic hemispheres from celestial hemispheres and from political usages such as the Western Hemisphere in diplomacy.
Half of the Earth s surface as divided by a great circle, most commonly the Northern and Southern Hemispheres separated by the equator and the Eastern and Western Hemispheres separated by the prime meridian and its antimeridian, with other divisions such as the land and water hemispheres that maximise land or ocean area; hemispheres are shown on double hemisphere world maps and used in climate, navigation and cultural geography.
What it is for: Dividing the Earth for geography, navigation and climate.
It can be explain definitions; relay geography and climate; describe cartographic uses; distinguish related senses.
Distinguishing features
Great circle division
Seasonal contrast
Multiple conventions
Cartographic tradition
What it looks like
Half a globe on a map.
Physical character
land in Northern Hemisphere: about 68 percent - of world land
land hemisphere land share: about 47 percent - centred near Nantes
water hemisphere land share: about 11 percent - centred near New Zealand
How it is recognised
Half of the Earth by a great circle
Northern, Southern, Eastern, Western, land and water hemispheres; double hemisphere maps
Celestial hemispheres are of the sky; the political Western Hemisphere means the Americas
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is divided by - for north and south
is contrasted with - of the sky
In practice
Families and kinds
Northern and Southern Hemispheres
Eastern and Western Hemispheres
land and water hemispheres
hemispheres on double hemisphere maps
political and cultural usages
Standards and regulation
IERS reference meridian conventions
No regulation
Failure modes and hazards
Confusing geographic and political hemispheres
Assuming seasons are the same worldwide
Inconsistent east-west boundaries
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What hemispheres are.
Definition.
Definition
Definition.
Definition
Definition.
- What are the hemispheres of the Earth, and how are the northern, southern, eastern, western, land and water hemispheres defined? definition
- Is the question about geography, the sky or political usage? boundary
Geography
Geography.
Geography
Geography.
- How are land, oceans and population distributed between hemispheres? definition
- Which entry fits the specific hemisphere? action
Science Seasons and climate.
Science.
Seasons
Seasons.
Seasons
Seasons.
- Why are seasons reversed between hemispheres, and how does the Coriolis effect differ? provenance
- Which references are standard? provenance
Climate
Climate.
Climate
Climate.
- How do the hemispheres differ in climate and ocean circulation? provenance
- Which sources are cited? provenance
Maps Cartography.
Practice.
Projections
Double hemisphere maps.
Projections
Projections.
- What are double hemisphere world maps, and how were they drawn historically? provenance
- Which entry fits map projection? action
Navigation
Navigation.
Navigation
Navigation.
- How do hemispheres matter in navigation and coordinate systems? provenance
- Which entry fits geographic coordinate system? action
Context Culture and politics.
Context.
Culture
Culture.
Culture
Culture.
- How are hemispheres used in cultural and economic terms such as the Global North and South? provenance
- Which entry fits Global North and Global South? action
Politics
Political usage.
Politics
Politics.
- What does Western Hemisphere mean in diplomacy, such as the Monroe Doctrine? provenance
- Which entry fits Western Hemisphere? action
What the second pass must settle
- Should each hemisphere be a separate entry?
- How should geographic references be linked?
- How should the double hemisphere map alias be recorded?