Object Reference Data

Data about an individual object begins with a record containing the keyword OBJ. This record specifies the object's classification code and localization character, separated by spaces.

The record format is as follows:

.OBJ classification_code localization_character

The classification code defines the type of objects.

For example: 31410000 - rivers, 41100000 - cities, and so on.

The localization character specifies the rules for metric description (coordinates) of objects and can take the following values:

LIN — linear objects;

SQR — areal objects;

DOT — point objects;

TIT — labels;

VEC — vector objects.

Following this, in any order, the following may be specified: the object's unique number, visibility range boundaries, object group number, number of subobjects, and other information that can be filled in as needed.

The object's unique number is specified in a record of the following format:

.KEY object_unique_number

The unique number is a positive integer (up to 2147483647). It can be used in data update procedures and for organizing logical connections with other objects or records in an external database.

The visibility range boundaries are specified in a record of the following format:

.GEN lower_bound upper_bound

Visibility boundaries indicate the range of map display scales at which the object should be visible. These are integers from 0 to 40 million. The visibility boundary value must not contain spaces, as they serve as field separators in the record.

The object group number is specified when several objects need to be logically connected. The record format is as follows:

.GRP group_number

The group number is an integer from 0 to 65535.