Coordinate
Summary
Coordinates are OsidPrimitives that represent a spatial position.
OSID Package
Coordinates are defined in the osid.mapping package.
Coordinates
Coordinate Types
Coordinates are used to communicate positions on any kind of map or spatial system. Coordinates across spatial systems differ in meaning as well as the number of dimensions in play. The Coordinate Type identifies the spatial system and indirectly identifies the format of the coordinate data.
Coordinate Data
Coordinates have a set of coordinate values. Each value corresponds to a dimension. The number of dimensions is likely dependent upon the Coordinate Type.
| Coordinate Type | Dimensions | Example Values |
|---|---|---|
| line | 1 | {6} |
| Universal Transverse Mercator (UTM) | 2 | {43.642567, 79.387139} |
| Earth-Centered, Earth Fixed (ECEF) | 3 | {-1787.072, -4513.034, 128.622} |
| Equatorial Coordinate System (ECS) | 2 | {18.61564898611111, 38.78368894444444} |
Uncertainty
As a measurement, Coordinates may also include the amount of uncertainty. Uncertainties are communicated in both the positive and negative direction. If defined, an uncertainty exists for each dimension for how much above and below the value is in the uncertainty range.
See Also