Ordinal

Overview

Ordinal refers to a type of categorical data that has a defined order or ranking among its categories, often used in GIS to represent qualitative attributes such as land use suitability or risk levels. Unlike interval data, the differences between ordinal values are not necessarily equal.

Key Concepts

Ranked categories have a meaningful order (low < medium < high). Non-equal intervals mean the difference between ranks may vary. Classification groups continuous data into ordered categories. Natural breaks is a classification method respecting data distribution.

Examples in GIS

AttributeOrdinal Values
Flood riskLow, Medium, High, Extreme
Soil drainagePoor, Moderate, Well, Excessive
Road conditionFailed, Poor, Fair, Good, Excellent
SuitabilityUnsuitable, Marginal, Suitable, Optimal

Measurement Scales

ScalePropertiesGIS Example
NominalCategories onlyLand use type
OrdinalOrder/rankRisk level
IntervalEqual intervalsTemperature (°C)
RatioTrue zeroDistance, area

Appendix

Created: 2025-12-13 | Modified: 2025-12-13

See Also