Object metrics

The metrics of the object of a digital map in Panorama terms can contain 2D or 3D coordinates of object elements.

The metrics of different objects can have the different format of storage and dimension.

Reason of variety - necessity to provide a high speed of data processing and files compactness at observance maximum accuracy of coordinates.

The object metrics of an electronic map can have some components: the metric of properly object and metric of subobjects.

Object metrics may consists of components: metrics of main object and metrics of subobjects.

The assignment of subobjects depends on a type.

For area objects the metric of the object describes an external outline, and metric of a subobject - internal outline ("cheese holes").

For example: an outline of glades in a forest, outline of islands on the river and so on.

For line objects the metric of a subobject is prolongation of the metric of the object after an enforced rupture.

For example: the field road at an intersection of the river can be torn in a place of ford.

But the given recording capability of the metric is not applied to the denotation of dashed objects. The way of object visualization should not influence its coordinates.

The metric of a subobject is applied to subscripts, when the text is necessary to place in some strings or  to place characters by special way or for the description of complex (difficult) subscripts including graphics units as a line or the dot sign.

The coordinate axes direction is based on Russian geodetic system (X - to the north, Y - to the west).