trilateration
C2Technical
Definition
Meaning
The process of determining absolute or relative locations of points by measuring distances, using the geometry of circles, spheres, or triangles.
A mathematical and surveying technique where the position of an unknown point is calculated from known distances to three reference points, foundational to modern GPS and other positioning systems.
Linguistics
Semantic Notes
Contrast with 'triangulation', which uses angles; trilateration uses distances. Often used in geodesy, surveying, navigation, and wireless communication networks.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. Spelling follows standard conventions (e.g., 'metre' vs. 'meter' in related context).
Connotations
Technical, precise, mathematical. No regional connotative differences.
Frequency
Equally rare in general discourse but standard in technical fields (engineering, geodesy, robotics) in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
trilateration of [object]trilateration using [tool/method]trilateration based on [data]trilateration to determine [location]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[No common idioms for this technical term]”
Usage
Context Usage
Business
Rare. Possibly in logistics or tech companies discussing asset tracking: 'The fleet management system uses cellular trilateration.'
Academic
Common in engineering, computer science, and geodesy papers: 'The node's position was resolved via 3D trilateration.'
Everyday
Virtually never used. A user might encounter it in advanced GPS device manuals.
Technical
Core term in surveying, robotics, navigation, and wireless sensor network design.
Examples
By Part of Speech
verb
British English
- The system will trilaterate the signal's source using three towers.
- We need to trilaterate the precise position of the rover.
American English
- The software trilaterates the tag's position in real time.
- They successfully trilaterated the emergency beacon.
adverb
British English
- [Not standardly used]
American English
- [Not standardly used]
adjective
British English
- The trilateration approach proved more accurate for this terrain.
- A trilateration survey was conducted.
American English
- They used a trilateration algorithm to solve for x, y, z coordinates.
- The trilateration method is fundamental to GPS.
Examples
By CEFR Level
- [Sentence too complex for A2]
- GPS finds your location using trilateration.
- Trilateration is a way to find where something is.
- Surveyors sometimes use trilateration to map an area accurately.
- Unlike triangulation, trilateration relies on measuring distances, not angles.
- The research paper compared the accuracy of triangulation and trilateration in urban canyons.
- Multilateration, an extension of trilateration using more reference points, reduces localization error.
Learning
Memory Aids
Mnemonic
Think: TRI (three) + LATERAL (side) + -TION. It's finding a point using the lengths of the three sides (distances).
Conceptual Metaphor
FINDING YOUR SPOT BY MEASURING STEPS (like finding a treasure by pacing out exact steps from three known trees).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'triangulyatsiya' (триангуляция). Russian may use 'trilateratsiya' or 'dal'nomernoye pozitsionirovaniye' (дальномерное позиционирование). The core distinction (distance vs. angle) must be preserved.
Common Mistakes
- Confusing 'trilateration' with 'triangulation'. Using 'trilateration' for a two-point system (bilateration). Incorrect stress: /trɪˈlætəreɪʃən/.
Practice
Quiz
What is the key geometric measurement used in trilateration?
FAQ
Frequently Asked Questions
Triangulation uses measured angles from known points to calculate location. Trilateration uses measured distances from known points.
In 2D, measuring distance to one point gives a circle of possible locations. Two distances give two intersection points (an ambiguity). Three distances uniquely determine a single point (ideally).
GPS is based on trilateration (technically, multilateration). It measures the time for signals to travel from satellites (converted to distance) to compute position.
Yes, but with challenges. Indoor positioning often uses Wi-Fi or Bluetooth signal strength (as a proxy for distance) for trilateration, though walls and reflections reduce accuracy.