The spatial, temporal, quantitative and analytical dimensions used to measure and study any phenomenon.
- The temporal scale is comprised of two properties:
- temporal extent – the total length of the time period of interest for a particular study (e.g. 10 years, 50 years, or 100 years);
- temporal grain (or resolution) – the temporal frequency with which data are observed or projected within this total period (e.g. at 1-year, 5-year or 10-year intervals).
- The spatial scale is comprised of two properties:
- spatial extent – the size of the total area of interest for a particular study (e.g. a watershed, a country, the entire planet);
- spatial grain (or resolution) – the size of the spatial units within this total area for which data are observed or predicted (e.g. fine-grained or coarse-grained grid cells).