Process Help

WFTREND - extend a wireframe along a planar trend beyond the data limits

 

Process Name

Menu Path

Link to Command Table

WFTREND

Structure ribbon | Process | Trend Surface

Click here

 

Introduction

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This is a Superprocess and running it may have an effect on other Datamine files in the project. More...

 

This process creates a DTM wireframe surface which can be extended beyond the data limits by a specified distance using a planar trend surface.

The data limits are detected automatically and the trend surface is only used beyond the limits of the actual data. The input data is a set of points which should be sorted.


Files, Fields and Parameters

Input Files

Name

Description

I/O Status

Required

Type

POINTIN

Input point data file.

Input

Yes

Point Data

Output Files

Name

I/O Status

Required

Type

Description

WIRETR

Output

Yes

Wireframe Triangle

Output wireframe triangle file.

WIREPT

Output

Yes

Wireframe Points

Output wireframe point file.

POINTOU

Output

No

Point Data

Output point data file. This includes both the input point data, and the points which were extrapolated using the trend surface.

Fields

Name

Description

Source

Required

Type

Default

XPT

X field in input point data file.

POINTIN

Yes

Numeric

XPT

YPT

Y field in input point data file.

POINTIN

Yes

Numeric

YPT

ZPT

Z field in input point data file.

POINTIN

Yes

Numeric

ZPT

Parameters

Name

Description

Required

Default

Range

Values

EXTN

The extension distance required beyond the data points for the triangulation.

Yes

Undefined

0.1,+

Undefined

GRIDINC

Grid interval for the interpolated points beyond the limits of the original point data.

Yes

Undefined

0.1,+

Undefined

TR

Flag to indicate whether the field in the wireframe triangle file should have different values depending on whether or not the triangle is in the extrapolated area: 0 = all triangles have colour defined by parameter 1 . 1 = triangles in the area covered by POINTIN data are coloured 1 and those in the extrapolated area are coloured 2.

No

0

0,1

0,1

1

Colour field for the output points and wireframe triangles for data lying within the area covered by POINTIN data.

No

1

1,64

Undefined

2

Colour field for the output point data file for data points which have been extrapolated. If parameter TR is set to 1, then triangles in the extrapolated area will also have this colour; otherwise they will be 1. If the parameter 2 is undefined then it will be set equal to 1.

No

Undefined

1,64

Undefined