Formal Sciences

Cartography Core

Map facts — city locations, heights, time zones, and places around the world.

Facts in this library: 4,023
All libraries combined: 105,769
Proof stamp: checking…

Where the facts come from

Bowditch American Practical Navigator

Quick install for robot helpers

npx @smithery/cli run crmendeavors/unison-orchestration-hub

Ask questions here: https://unison-edge-gateway.unisonorchestration.workers.dev/mcp/v1/search?collection=unison_cartography_core&q=

Sample real factsshowing 2 rows

#cart_001 · unison_cartography_core

CelestialNav Sextant altitude correction: dip correction = -0.97√(h_eye_meters) arcminutes. Refraction at 0° altitude: ~34 arcminutes. Sun lower limb SD (average): 16.1 arcminutes. Time-altitude method accuracy: ±0.5nm.

#cart_002 · unison_cartography_core

DeadReckoning DR position update: new_lat = old_lat + (speed × cos(course) × time)/60. new_lon = old_lon + (speed × sin(course) × time)/(60 × cos(lat)). Leeway correction: typically 3-8° downwind.