Introduction > File types

During any typical session a number of files will be written to the project folder to store sections, ground models, vertical alignments and other road design related information. A logical file naming system will help manage the various files created. Some files (e.g. string files) may not be specific to one project and should be saved at an appropriate location. The main files used (in the sequence of a typical training course) are :-

.sek

Section or cross sections (created from drawing entities, models and design functions)

.kgm

Ground model. Mathematical representation of an existing or proposed surface as a number of triangles. Models are created from drawing entities or .xyz files and are also used in analytical applications.

.vtg

Vertical alignment geometry. Created by menu item Design, Vertical, Extract geometry

.stg

Design string definitions created by menu item Design, Strings, Define or Edit. Stores the relationship between the Master String and one or many design strings such as centre, channels, kerbs, verges fixed by offset and gradient etc.

Note that no KTF files are linked or related in a dynamic way to any drawing or other file.

Other files include :-

.caf

Colour allocation file used to store user defined real colours related to model Z values used in Ground Modelling, Analysis and Colour mapping, Z value.

.ele

Stores elevation band colour assignments relating model Z values to user defined AutoCAD colour numbers. Created by Ground Modelling, Analysis and Colour mapping, Z value.

.hou

House corner co-ordinates.

.hzg

Stores horizontal alignment geometry and may include transitions.

.kdr

Design report files from a number of menu items in Design, Strings.

.lsc

Horizontal alignment chainage data (e.g.) every 10 metres output by menu item Design, Horizontal, Extract geometry.

.lst

Horizontal alignment elements (IPs, bearings etc.) output by menu item Design, Horizontal, Extract geometry.

.sky

ZVI target data, visual barriers and parameters.

.txt

Simple ascii format in columns to store Easting, Northing, Level, Point no. and Feature code.

See the Land Survey section for a full description.