PERDTM Process

To access this process:

Digitize ribbon >> Transform >> Project >> Project Strings to Wireframe.
View the Find Command screen, select PERDTM and click Run.
Enter "PERDTM " into the Command Line and press <ENTER>.

See this process in the Command Table.

Introduction

Convert 2-dimensional perimeters to 3-dimensional perimeters by vertical projection onto a DTM surface.

Values for additional fields in the input perimeter are taken as constant for the string and therefore carried across to each point of that string in the output perimeter.

Note: A perimeter must lie entirely within the area defined by the DTM wireframe, otherwise points lying beyond will have undefined ZP values.

Input Files

Name	Description	I/O Status	Required	Type
PERIMIN	Input perimeter file	Input	Yes	String
WIRETR	Input DTM triangle file	Input	Yes	Wireframe Triangle
WIREPT	Input DTM point file	Input	Yes	Wireframe Points

Output Files

Name	I/O Status	Required	Type	Description
PERIMOUT	Output	Yes	String	Output perimeter file

Example

!PERDTM &PERIMIN(PER),&WIREPT(ZON1PT),&WIRETR(ZON1TR),

&PERIMOUT(PERZ)

Error and Warning Messages

Message	Description
>>> WARNING - POINT IDENTIFIER nnnnnn TOO LARGE >>> AT POINT FILE RECORD NUMBER rrrr.	There is a problem with the point data file.
>>> FIELD aaaaaaaa MISSING FROM TRIANGLE FILE	One of the compulsory triangle fields (PID1,PID2,PID3) is missing.
>>> FIELD aaaaaaaa MISSING FROM POINT FILE	One of the compulsory point fields (XP,YP,ZP,PVALUE,PID,PTN) is missing.