Graphic Information - Attributes
Levels of measurements - Nominal, Ordinal, Interval, Ratio.
- Nominal: Assign a label or class to a feature, e.g. 1 is a well, 2 is a catch basin.
- Ordinal: Have a
rank assigned to them e.g. 1 is light, 2 moderate, 3 heavy.
- Interval: Values measured on relative scale e.g. elevations measured from some datum.
- Ratio: Values measured on an absolute scale e.g. coordinates or total precipitation.