Spatial Aggregation

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

A measurement that aggregates entities located within a spatial region, yielding a scalar result such as a count, density, or average. The aggregation region is the observedFeature; the result is a ScalarQuantity. The actual computation is performed by the solver layer (Principle 12), not materialised as asserted triples in the OWL core.

Structure

Subclass of: gmeow:Measurement

Practical Pattern

Use gmeow:SpatialAggregation as a specialized kind of gmeow:Measurement. Add statement metadata or a standpoint when the assertion needs provenance, confidence, or vantage.

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:Measurement

Projects To

External Equivalences

Equivalent or closely aligned targets: qb

Linkages

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

Term Equivalences

Projection Coverage