An axis section drawing definition must always include the definition of an axis reference system. All data presented in the axis section drawing will be presented in that selected reference system. I.e. if the definition includes data from features or observations using other spatial reference systems the spatial information will be transformed to the selected axis reference system (if possible).

Additionally the user can define an interval on that reference system to limit the amount of data rendered in the axis section drawing. This interval can be defined using a static or a dynamic axis interval. No matter which features or views are bound to the drawing definition only elements that are located within this interval (possibly after a spatial transformation) will be drawn.

A static axis interval is simply defined by providing two offsets in the axis reference system of the drawing.

A dynamic interval is specified by referencing a feature of type Axis position, specifying a timestamp and specifying two offsets. The basic location reference is the axis location recorded for the selected axis position feature that nearest to the passed timestamp. If no timestamp is given, the latest observation is used. From this basic location reference the interval is calculated by adding offset 1 and offset 2. Table 1 gives some examples of this dynamic interval logic.

Table 1: Examples for settings of a dynamic axis interval.