National Spatial Reference System
E50885
The National Spatial Reference System is the official coordinate framework used in the United States to define precise locations, elevations, and boundaries for mapping, surveying, and navigation.
All labels observed (3)
| Label | Occurrences |
|---|---|
| National Spatial Reference System canonical | 6 |
| Census Bureau geographic coordinate systems | 1 |
| North American National Spatial Reference System | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T402117 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: National Spatial Reference System Context triple: [National Geodetic Survey, responsibleFor, National Spatial Reference System]
-
A.
Public Land Survey System
The Public Land Survey System is a standardized method used in the United States to divide and describe land into rectangular parcels for ownership and development.
-
B.
Geographic Names Information System
The Geographic Names Information System is the official federal database of geographic feature names in the United States, providing standardized names and related information for use in maps and government publications.
-
C.
WGS84
WGS84 is the global geodetic reference system and standard coordinate framework used for GPS and most modern mapping applications.
-
D.
National Geodetic Survey
The National Geodetic Survey is the U.S. federal agency responsible for defining, maintaining, and providing access to the national coordinate system used for mapping, charting, and navigation.
-
E.
Principles, Policies, and Procedures for Domestic Geographic Names
Principles, Policies, and Procedures for Domestic Geographic Names is the official guideline document that sets the standards and rules for naming geographic features within the United States.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: National Spatial Reference System Target entity description: The National Spatial Reference System is the official coordinate framework used in the United States to define precise locations, elevations, and boundaries for mapping, surveying, and navigation.
-
A.
Public Land Survey System
The Public Land Survey System is a standardized method used in the United States to divide and describe land into rectangular parcels for ownership and development.
-
B.
Geographic Names Information System
The Geographic Names Information System is the official federal database of geographic feature names in the United States, providing standardized names and related information for use in maps and government publications.
-
C.
WGS84
WGS84 is the global geodetic reference system and standard coordinate framework used for GPS and most modern mapping applications.
-
D.
National Geodetic Survey
The National Geodetic Survey is the U.S. federal agency responsible for defining, maintaining, and providing access to the national coordinate system used for mapping, charting, and navigation.
-
E.
Principles, Policies, and Procedures for Domestic Geographic Names
Principles, Policies, and Procedures for Domestic Geographic Names is the official guideline document that sets the standards and rules for naming geographic features within the United States.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
geodetic reference system
ⓘ
national spatial reference system ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| defines |
boundaries
ⓘ
elevations ⓘ geometric coordinates ⓘ geopotential coordinates ⓘ horizontal positions ⓘ precise locations ⓘ vertical positions ⓘ |
| goal | ensure spatial data consistency across the United States ⓘ |
| historicalComponent |
NAD 83
ⓘ
NAVD 88 ⓘ North American Datum of 1983 ⓘ North American Vertical Datum of 1988 ⓘ |
| includes |
CORS network
ⓘ
bench marks ⓘ continuously operating reference stations ⓘ coordinate transformation tools ⓘ geodetic control points ⓘ geoid models ⓘ geometric reference frame ⓘ geopotential reference frame ⓘ gravity data ⓘ survey marks ⓘ |
| legalStatus | official U.S. civilian spatial reference system ⓘ |
| maintainedBy |
NGS
ⓘ
National Geodetic Survey ⓘ |
| parentOrganization |
National Oceanic and Atmospheric Administration
ⓘ
surface form:
NOAA
National Oceanic and Atmospheric Administration ⓘ |
| partOf | U.S. geospatial infrastructure ⓘ |
| referenceEpoch | time-dependent coordinates ⓘ |
| scope |
United States territories
ⓘ
surface form:
U.S. territories
coastal waters of the United States ⓘ land areas of the United States ⓘ |
| shortName | NSRS ⓘ |
| supports |
GNSS positioning
ⓘ
GPS surveying ⓘ height modernization ⓘ |
| usedFor |
GIS applications
ⓘ
coastal zone management ⓘ engineering projects ⓘ floodplain management ⓘ infrastructure planning ⓘ mapping ⓘ navigation ⓘ property boundary determination ⓘ surveying ⓘ |
| willBeModernizedBy |
modernized geometric reference frame
ⓘ
modernized geopotential reference frame ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: National Spatial Reference System Description of subject: The National Spatial Reference System is the official coordinate framework used in the United States to define precise locations, elevations, and boundaries for mapping, surveying, and navigation.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
National Geodetic Survey
subject surface form:
National Geodetic Survey
this entity surface form:
North American National Spatial Reference System
United States Census Bureau places in Oklahoma
→
spatialReferenceSystem
→
National Spatial Reference System
ⓘ
this entity surface form:
Census Bureau geographic coordinate systems