{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.latitude","code":"thing-q34027","url":"https://ver.cy/models/thing/q34027/","name":"latitude","alternateNames":["south latitude","north latitude","geocentric latitude","corrected mean latitude"],"kind":"thing","status":"published","version":"0.2.0-wave.3","language":"en","classifiers":{"family":"Thing Registry","category":"Cross-cutting context","entryKind":"thing","plane":"XCT","domain":["XCT.QLT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"The angular distance of a point on the Earth surface north or south of the equator, measured from 0 degrees at the equator to 90 degrees at the poles, as geodetic latitude relative to the reference ellipsoid or, in other definitions, geocentric or astronomical latitude; latitude is one of the two coordinates of geographic position, determines climate zones and day length, and is measured today by satellite positioning and historically by observing the sun and stars.","purpose":"Let an agent explain latitude and its definitions, relay how it is measured and expressed, describe its role in navigation, mapping and climate, and distinguish geodetic from geocentric and other latitudes.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Equator as origin","Multiple definitions by reference surface","Determines climate zones","Measured by celestial and satellite methods"],"structure":{"bundles":[{"id":"define","name":"Define","description":"What latitude is.","layers":[{"id":"definition","name":"Definition","description":"Definition and kinds.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is latitude, and how do geodetic, geocentric and astronomical latitudes differ?","kind":"definition"},{"text":"Is the question about latitude, longitude or a specific parallel?","kind":"boundary"}]}]},{"id":"notation","name":"Notation","description":"Notation.","findings":[{"id":"notation-finding","name":"Notation","description":"Notation.","questions":[{"text":"How is latitude written in degrees, minutes and seconds or decimal form, and with what standards?","kind":"provenance"},{"text":"Which entry fits geographic coordinate system?","kind":"action"}]}]}]},{"id":"measure","name":"Measure","description":"Measurement.","layers":[{"id":"methods","name":"Methods","description":"Methods.","findings":[{"id":"methods-finding","name":"Methods","description":"Methods.","questions":[{"text":"How is latitude measured, from sextant observations to GNSS?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"compute","name":"Compute","description":"Calculation.","findings":[{"id":"compute-finding","name":"Compute","description":"Compute.","questions":[{"text":"How are distances and conversions between latitude kinds computed?","kind":"action"},{"text":"What is the result for the values in question?","kind":"measurement"}]}]}]},{"id":"effects","name":"Effects","description":"Climate and daylight.","layers":[{"id":"climate","name":"Climate","description":"Climate zones.","findings":[{"id":"climate-finding","name":"Climate","description":"Climate.","questions":[{"text":"How does latitude determine climate zones and seasons?","kind":"provenance"},{"text":"Which entry fits climate zone?","kind":"action"}]}]},{"id":"daylight","name":"Daylight","description":"Day length.","findings":[{"id":"daylight-finding","name":"Daylight","description":"Daylight.","questions":[{"text":"How does latitude affect day length and the position of the sun?","kind":"provenance"},{"text":"Which entry fits solar geometry?","kind":"action"}]}]}]},{"id":"context","name":"Context","description":"History and teaching.","layers":[{"id":"history","name":"History","description":"History.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How did latitude measurement develop from ancient Greece to modern geodesy?","kind":"provenance"},{"text":"Which entry fits the history of navigation?","kind":"action"}]}]},{"id":"teach","name":"Teach","description":"Teaching.","findings":[{"id":"teach-finding","name":"Teach","description":"Teaching.","questions":[{"text":"How is latitude taught, and which misconceptions arise?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Compute and convert latitudes, stating the datum and whether geodetic, geocentric or astronomical.","Check coordinates for range and sign errors before use."],"mustNot":["Mix datums or latitude definitions so that positions shift without notice.","Swap latitude and longitude or drop the hemisphere sign in navigation or emergency data.","Publish precise latitudes of private homes or sensitive sites without a reason."],"requiresHuman":["Relying on coordinates for search and rescue or emergency dispatch."]},"ethics":{"considerations":["Coordinate errors can send rescuers to the wrong place.","Precise positions can expose people to surveillance or harm."],"affectedParties":["Travellers and crews","Emergency services","People at located addresses"]},"owners":{"steward":"Nobody owns a coordinate; geodetic agencies define the reference systems.","roles":[],"masterSystems":[]},"relations":[{"target":"Q107715","type":"parent","note":"registry parent class"},{"target":"Q11352","type":"parent","note":"registry parent class"},{"target":"angle","type":"related","note":"in registry terms"},{"target":"physical quantity","type":"related","note":"in registry terms"},{"target":"longitude","type":"related","note":"in geographic coordinates"},{"target":"reference ellipsoid","type":"related","note":"for geodetic latitude"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.latitude","Wikidata: Q34027 (https://www.wikidata.org/wiki/Q34027)","notation: degrees N or S, or signed decimal degrees"]},"properties":{"applicability":"not-applicable","items":["range: 0 to 90 degrees - north or south","length of one degree: about 111 km - varies slightly with latitude"]},"recognition":{"applicability":"optional","items":["Angle north or south of the equator","Geodetic, geocentric and astronomical kinds","Longitude is east-west; parallels are the lines of constant latitude","Not a visible object; parallels drawn on maps and globes."]},"capabilities":{"applicability":"required","items":["explain definitions and notation","relay measurement methods","describe role in climate and navigation","distinguish kinds of latitude"]},"hazards":{"applicability":"required","items":["Confusing latitude kinds","Datum mismatches","Sign and hemisphere errors"]},"interfaces":{"applicability":"required","items":["World Geodetic System and other datums","ISO 6709 for geographic point locations","Nautical conventions for latitude notation"]},"context":{"applicability":"required","items":["Locating positions north or south on the Earth.","geodetic latitude","geocentric latitude","astronomical latitude","north and south latitude","corrected mean latitude and other navigational quantities","special parallels such as the tropics and polar circles"]}},"sources":[{"title":"Wikidata item Q34027: latitude","url":"https://www.wikidata.org/wiki/Q34027","note":"identity and sense of the item"},{"title":"Wikipedia: Latitude","url":"https://en.wikipedia.org/wiki/Latitude","note":"general description of the item"}],"openQuestions":["Should geographic coordinate system be the primary entry?","How should datum standards be linked?","The registry entry has merged aliases naming kinds and navigational terms; should they be split off?"],"resources":{"spec":"/models/things/publications/thing-q34027/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q34027/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T23:20:25Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"not-applicable","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-06T19:51:59+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane XCT: no invented physical properties."},"score":1.0}}