aggregation function

• CURIE: gmeow:aggregationFunction
• IRI: https://blackcatinformatics.ca/gmeow/aggregationFunction
• Category: property
• Defined by: gmeow:slices/aggregation
• Box roles: RBox role (What is this?)

The statistical function applied to the entities in the aggregation region — count, sum, average, density, minimum, maximum, or centroid.

Structure

Property shape: object property; gmeow:SpatialAggregation -> gmeow:AggregationFunction; functional

Practical Pattern

Use gmeow:aggregationFunction from gmeow:SpatialAggregation to gmeow:AggregationFunction when the relationship itself belongs in the native GMEOW graph.

Example Snippets

These snippets are generated from canonical slice examples and trimmed to the Turtle blocks where this term appears.

Spatial Bins

• Source: slices/extensions/aggregation/examples/spatial-bins.ttl
• Examples catalog: open in catalog#example-slices-extensions-aggregation-examples-spatial-bins

# SPDX-FileCopyrightText: 2026 Blackcat Informatics® Inc. <paudley@blackcatinformatics.ca>
# SPDX-License-Identifier: CC-BY-4.0
#
# Worked example: spatial aggregation IS a measurement, with a privacy floor
# . A gmeow:SpatialAggregation is a gmeow:Measurement (so it carries the
# observation bundle: observedFeature, vantage, observationMethod, result) that
# applies a gmeow:aggregationFunction (average / count / density …) over
# gmeow:SpatialBins. gmeow:minimumPopulation is the k-anonymity floor: bins with
# fewer than that many people are NOT reported, so the aggregate can be published
# without re-identifying individuals (P12 — the safe public projection).
@prefix gmeow: <https://blackcatinformatics.ca/gmeow/> .
@prefix ex:    <https://blackcatinformatics.ca/gmeow/examples/aggregation/> .
@prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd:   <http://www.w3.org/2001/XMLSchema#> .

# --- The aggregation: average household size over the region, by survey, with a
#     1000-person minimum-population floor for safe publication.
ex:householdAgg a gmeow:SpatialAggregation ;
    gmeow:observedFeature     ex:metro ;
    gmeow:vantage             ex:censusBureau ;
    gmeow:observationMethod   gmeow:methodSurvey ;
    gmeow:aggregationFunction gmeow:aggAverage ;
    gmeow:minimumPopulation   "1000"^^xsd:nonNegativeInteger ;
    gmeow:hasBin              ex:downtownBin ;
    gmeow:observationResult   ex:avgHouseholdSize .

Common Companion Terms

gmeow:SpatialAggregation, gmeow:AggregationFunction

Projects To

Linkages

Generated from the canonical mapping DSL. SSSOM files are the generated public interchange form for term equivalences.

Projection Coverage