Offset values

An offset value is a number that is subtracted from all coordinates, leaving only positive values as a remainder.

IBM® Spatial Support for Db2 for z/OS® converts your coordinate data using the following formulas to ensure that all adjusted coordinate values are greater than 0.

Formula notation: In these formulas, the notation min represents the minimum of all. For example, min(x) means the minimum of all x coordinates. The offset for each geographic direction is represented as dimensionOffset. For example, xOffset is the offset value applied to all X coordinates.


min(x) – xOffset ≥ 0 
min(y) – yOffset ≥ 0 
min(z) – zOffset ≥ 0
min(m) – mOffset ≥ 0