Reader Directives

The suffixes shown below are prefixed by the current <ReaderKeyword> in a mapping file. By default, the <ReaderKeyword> for the AIXM 4.5 reader is AIXM.

DATASET

Required/Optional: Required

The value for this directive is the path of the AIXM file to be read. A typical mapping file fragment specifying an input AIXM dataset looks like:

AIXM_DATASET /usr/data/aixm.xml

Workbench Parameter: Source Aeronautical Information Exchange Model (AIXM) File(s)

INTERPOLATE

Required/Optional: Optional

The value for this directive determines whether non-linear interpolation will be performed between two vertices of an area or line geometry. This keyword will also determine the representation of geometry data. Further information on this topic can be found under the Feature Representation heading. An example mapping file fragment specifying that interpolation should be performed looks like:

INTERPOLATE Yes

SEARCH_ENVELOPE

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 interact with the bounding box are returned.

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

Mapping File Syntax

<ReaderKeyword>_SEARCH_ENVELOPE <minX> <minY> <maxX> <maxY>

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

Required/Optional

Optional

Workbench Parameter

Minimum X, Minimum Y, Maximum X, Maximum Y

SEARCH_ENVELOPE_COORDINATE_SYSTEM

This directive specifies the coordinate system of the search envelope if it is different than the coordinate system of the data.

The COORDINATE_SYSTEM directive, which specifies the coordinate system associated with the data to be read, must always be set if the SEARCH_ENVELOPE_COORDINATE_SYSTEM directive is set.

If this directive is set, the minimum and maximum points of the search envelope are reprojected from the SEARCH_ENVELOPE_COORDINATE_SYSTEM to the reader COORDINATE_SYSTEM prior to applying the envelope.

Required/Optional

Optional

Mapping File Syntax

<ReaderKeyword>_SEARCH_ENVELOPE_COORDINATE_SYSTEM <coordinate system>

Workbench Parameter

Search Envelope Coordinate System

CLIP_TO_ENVELOPE

This directive specifies whether or not FME should clip features to the envelope specified in the SEARCH_ENVELOPE directive.

Values

YES | NO (default)

Mapping File Syntax

<ReaderKeyword>_CLIP_TO_ENVELOPE [yes | no]

Workbench Parameter

Clip To Envelope