Vector Product Format Database (VPF_DB) Reader Parameters

The value for this parameter is the path to the DHT file.

The folder in which this file exists is the root folder of the VPF database. This folder directly and indirectly contains all the libraries, coverages, feature classes and related metadata for the database. A typical file path that selects a VMap database from drive e: would be:

e:/vmaplv0/dht

This parameter is used to limit the available feature classes that are read. If this parameter is not specified, all available feature classes are read.

The value for this parameter is the character that is used in a feature’s feature type to separate the library and coverage names from the metadata table and feature class names. If this attribute is not specified, then the ‘\’ separator is used.

This optional parameter is used to limit geometric features that are produced. Only feature class features that exist in the specified tiles will be output. If no value is specified, then all the tiles in the library will be used.

Syntax

<tileId0>, <tileId1>,...

To specify a range of tiles:

<tileId0>-<tileIdN>

This parameter is ignored if a tiled subset is specified for a nontiled library.

This parameter specifies the regional extents of the tiled subsection.

Syntax

[xmin, ymin, xmax, ymax]

This parameter is ignored if the data is not tiled.

Use this parameter to expose Format Attributes in Workbench when you create a workspace:

• In a dynamic scenario, it means these attributes can be passed to the output dataset at runtime.
• In a non-dynamic scenario where you have multiple feature types, it is convenient to expose additional attributes from one parameter. For example, if you have ten feature types and want to expose the same attribute in each one, it is easier to define it once than it is to set each feature type individually in the workspace.

Using the minimum and maximum x and y parameters, define a bounding box that will be used to filter the input features. Only features that intersect with the bounding box are returned.

If all four coordinates of the search envelope are specified as 0, the search envelope will be disabled.

Select this parameter to remove any portions of exported features outside the area of interest.

The illustration below shows the results of the Search Envelope when Clip to Search Envelope is set to No on the left side and Yes on the right side.

• No: Any features that cross the search envelope boundary will be read, including the portion that lies outside of the boundary.
• Yes: Any features that cross the search envelope boundary will be clipped at the boundary, and only the portion that lies inside the boundary will be read. The underlying function for the Clip to Search Envelope function is an intersection; however, when Clip to Search Envelope is set to Yes, a clip is also performed in addition to the intersection.