Process Help PERDTM - create 3D perimeters by projecting 2D perimeters onto a DTM surface

 

Process Name	Menu Path	Link to Command Table
PERDTM	Structure ribbon | Process | Project Strings to Wireframe Edit ribbon | Project | Project | Project String to Wireframe	Click here

 

• Introduction
• Files, Fields and Parameters
• Notes
• Example
• Errors

Introduction

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

How to use

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.

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Files, Fields and Parameters

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

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Notes

It should be ensured that the perimeter lies entirely within the area defined by the DTM wireframe, otherwise points lying beyond will have undefined ZP values.

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Example

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

&PERIMOUT(PERZ)  

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Error and Warning Messages

Message	Description	Solution
>>> 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.

 

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