Ordinate dimensions measure the perpendicular distance from an origin point called the datum to an element. These dimensions prevent escalating errors by maintaining accurate offsets of the features from the datum.
You can create baseline and ordinate dimensions for linear dimension styles. Linear dimension styles include aligned, horizontal, and vertical dimensions. To create a baseline or ordinate dimension for these linear dimension styles, you need to edit the Dimension String type parameter. Since this is a type parameter, you may want to create a new baseline or ordinate linear dimension style so that any continuous dimensions in the project are not affected when you edit the parameter.