Description of symbols file (D14)

File of symbols is applied at converting of map into DXF format.

File of symbols is a text file, has an any name and standard name extension .d14

File contains the description of conventional symbols of a map of the fixed scale, prepared by means of AutoCAD. It can be used at processing of only point objects. As a rule, one file of symbols is created for one type and scale of maps.

For example: a file 2000.d14 - for the cadastral plan of city of scale 1:2000.

Structure of symbols file looks like:

.DXL (one line)

.SCALE MASHT (one line)

SYMBOL (some lines)

.END (one line)

where:

.DXL - an obligatory line constant

.SCALE MASHT

.SCALE - an obligatory line constant

MASHT - a denominator of map scale, number (for example 2000)

.END - an obligatory line constant

Description "SYMBOL" is consist of 3 parts:

MARKER of OBJECT (one line)

SEMANTICS (is not always obligatory) (if it is present, one or two lines)

DESCRIPTION of the SYMBOL (some lines)

MARKER of OBJECT looks like:

.OBJ EXTERNAL_CODE DOT

where:

.OBJ - an obligatory line constant

EXTERNAL_CODE - an external code of object (8 numerals) in a format of Map 2011 package

DOT - the obligatory line constant specifies, that object is a dot (a point) object

SEMANTICS looks like:

.SEM NUMBERS_CODES

CODE_CHARACTERISTICS VALUE_CHARACTERISTICS

and number of lines is equal to NUMBER_CODES and each code from a new line

.SEM - an obligatory line constant

SEMANTICS field is filled only for objects having different graphic representation and the same external code. Attributing of semantics to object is carried out in view of the map classifier.

CODE_CHARACTERISTICS, VALUE_CHARACTERISTICS - integers

SYMBOL description represents the block (in terms of AutoCAD package) of DXF format, consisting of aggregate of graphic primitives which display a dot object.

Create file of symbols is carried out by means of any text editor and AutoCAD package.

Example of the prepared file of symbols.