VertexCreator

Appends coordinates to null, point, text, line, and arc geometry, or replaces existing geometry with point geometry.

If the feature turns into a closed polygon as a result of adding the point, it will be tagged as an area feature; otherwise, it will be tagged as a line or a path ending in a line for arcs. (However, if this was the first point added, it will be tagged as a point.)

Configuration

Input Ports

Input

If the Mode parameter is set to Add Point, this transformer accepts features with null, point, text, line, or arc geometries. In this case, the transformer has no effect on features containing other types of geometries.

The table below shows input features and their resulting geometries.

Input Feature	Add Point - Resulting Geometry
null geometry	point
point geometry	line
text geometry	line
line geometry	line or polygon
arc geometry	path or polygon (with path boundary)
other geometry	untouched original geometry

Text features are treated as though their geometry is a point at the text's location.

If the input feature has 3D geometry and only the X and Y parameters are specified, The added point will inherit a z value from the nearest vertex on the input feature.

If the Z parameter is an attribute whose value is null, missing or an empty string, the resulting geometry will also be 3D with z from the nearest original vertex.

Conversely, if the input feature has 2D geometry and the X, Y, and Z parameters are all specified, then the resulting geometry will be promoted to 3D and any pre-existing 2D coordinates will gain the same Z value specified for the added vertex.

If the Mode parameter is set to Replace with Point, then this transformer accepts features with all types of geometries.

If the Mode parameter is set to Insert Point at Index or Replace Point at Index, then this transformer will accept only lines, paths, and polygons. If the input is a path, the last point in one segment and the first point in the next segment will be treated as two separate points (but with the same coordinates), and will therefore take up two index positions. For example, a path consisting of two segments and a total of 5 points will technically have 6 points (and consequently, 6 index positions that can be replaced/inserted to).

For polygons, the transformer will operate on the polygon's boundary as a curve, then replace the polygon's old boundary with the modified one.

Output Ports

Parameters

General

Mode	The features with the new point geometry appended to, or replacing, the existing geometry. If the Mode parameter is set to Add Point, the VertexCreator will attempt to append the specified coordinates as a point on the given feature geometry. This geometry must be of the type null, point, text, line, or arc. Other types of input feature geometry will be ignored. If this parameter is set to Replace with Point, the VertexCreator will replace any existing geometry on the feature with a point geometry at the specified coordinates. If this parameter is set to Insert Point At Index, the VertexCreator will insert a point with x, y, and z (if the input geometry is 3D, a Z value will be interpolated if not specified) coordinates into the input geometry at the index specified. If this parameter is set to Replace Point At Index, the VertexCreator will replace the current point at the index specified of the input geometry with a new point that has the coordinates specified. The measures at that index will not be replaced. If the Z value is blank, the Z value at that index will not be replaced.
X Value	You can either choose coordinates from the value of a feature attribute by selecting the attribute name from the pull-down list, or enter numbers. If a selected attribute has a value that is null, missing or an empty string, the feature will be output through the <Rejected> port.
Y Value	You can either choose coordinates from the value of a feature attribute by selecting the attribute name from the pull-down list, or enter numbers. If a selected attribute has a value that is null, missing or an empty string, the feature will be output through the <Rejected> port.
Z Value	You can either choose coordinates from the value of a feature attribute by selecting the attribute name from the pull-down list, or enter numbers. If the optional Z Value parameter is specified, the resulting feature will have a 3D geometry. You can either choose coordinates from the value of a feature attribute by selecting the attribute name from the pull-down list, or enter constants. See the “Advanced Parameters” section for information on how to deal with elevation when vertices do not have the same dimension as the input geometry. Note The SurfaceDraper transformer can be used to supply interpolated elevation values to the vertices of 2D features based on a 3D grid or set of 3D features.
Index	If the Mode parameter is set to Insert Point At Index or Replace Point At Index, then the VertexCreator transformer will insert or replace a point at the Index specified. Negative index values count back from the last vertex in the input feature.

Advanced Parameters

Measures/Z Conflict Value	This parameter specifies how to deal with geometries that have a measure, but are missing at least one value, or that have z values, but are missing at least one value. None (Drop Values): Remove incomplete measures or z values. Compute(default): Look at the values on either side of the missing value, and compute an estimate. Custom Value: The missing values are filled in with the specified custom default value. In Add Point mode, if the feature geometry is 3D, and the coordinate to add is 2D and its x and y values match one of the endpoints of the feature geometry, the transformer will attempt to use the z value of one of those points before using the specified conflict value.
Treat Measures as	When using the Compute mode to compute missing measure values, measures can be considered Continuous, and linearly interpolated from their neighbors, or they can be Discrete, and taken exactly from the nearest neighbor.
Ignore Duplicated Coordinates	In Add Point mode, this parameter specifies whether to add a coordinate if it is the same as the existing last coordinate of the feature geometry. If Yes, existing consecutive duplicate coordinates are removed when closing a line into a polygon. If No, existing consecutive duplicate coordinates are not removed when closing a line into a polygon.
Closed Line Handling	In Add Point mode, this parameter specifies whether to attempt to close lines into polygons or to keep them as lines.

Editing Transformer Parameters

Transformer parameters can be set by directly entering values, using expressions, or referencing other elements in the workspace such as attribute values or user parameters. Various editors and context menus are available to assist. To see what is available, click beside the applicable parameter.

How to Set Parameter Values

Defining Values

There are several ways to define a value for use in a Transformer. The simplest is to simply type in a value or string, which can include functions of various types such as attribute references, math and string functions, and workspace parameters.

Using the Text Editor

The Text Editor provides a convenient way to construct text strings (including regular expressions) from various data sources, such as attributes, parameters, and constants, where the result is used directly inside a parameter.

Text Editor

Using the Arithmetic Editor

The Arithmetic Editor provides a convenient way to construct math expressions from various data sources, such as attributes, parameters, and feature functions, where the result is used directly inside a parameter.

Arithmetic Editor

Conditional Values

Set values depending on one or more test conditions that either pass or fail.

Parameter Condition Definition Dialog

Content

Expressions and strings can include a number of functions, characters, parameters, and more.

When setting values - whether entered directly in a parameter or constructed using one of the editors - strings and expressions containing String, Math, Date/Time or FME Feature Functions will have those functions evaluated. Therefore, the names of these functions (in the form @<function_name>) should not be used as literal string values.

Content Types

String Functions	These functions manipulate and format strings.
Special Characters	A set of control characters is available in the Text Editor.
Math Functions	Math functions are available in both editors.
Date/Time Functions	Date and time functions are available in the Text Editor.
Math Operators	These operators are available in the Arithmetic Editor.
FME Feature Functions	These return primarily feature-specific values.
FME Parameters	FME and workspace-specific parameters may be used.
Creating and Modifying User Parameters	Create your own editable parameters.

Dialog Options - Tables

Table Tools

Transformers with table-style parameters have additional tools for populating and manipulating values.

Row Reordering

Enabled once you have clicked on a row item. Choices include:

Add a row
Remove a row
Move current row up one
Move current row down one
Move current row to top
Move current row to bottom

Cut, Copy, and Paste

Enabled once you have clicked on a row item. Choices include:

Cut a row - delete and copy to clipboard
Copy a row to the clipboard
Paste a row from the clipboard

Cut, copy, and paste may be used within a transformer, or between transformers.

Filter

Start typing a string, and the matrix will only display rows matching those characters. Searches all columns. This only affects the display of attributes within the transformer - it does not alter which attributes are output.

Import

Import populates the table with a set of new attributes read from a dataset. Specific application varies between transformers.

Reset/Refresh

Generally resets the table to its initial state, and may provide additional options to remove invalid entries. Behavior varies between transformers.

Note: Not all tools are available in all transformers.

For more information, see Transformer Parameter Menu Options.

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Keywords: 2DPointAdder 3DPointAdder 2DPointReplacer 3DPointReplacer