The directives that are processed by the NetCDF reader are listed below. The suffixes shown are prefixed by the current <ReaderKeyword>_ in a mapping file. By default, the <ReaderKeyword> for the NetCDF reader is NETCDF.
DATASET
The value for this keyword is the name of a single NetCDF file.
The normal extension for the file is .nc.
Required/Optional
Required
Mapping File Syntax
NETCDF_DATASET “C:\DATA\NETCDF\latvert.nc”
Workbench Parameter
Source NetCDF File
FEATURE_TYPE_NAME
The values for this directive are listed in the table below. The Feature Type Name depends on the value used.
| Value | Feature Type Name | Example |
|---|---|---|
|
FORMAT_NAME (default value) |
<reader_type_name> |
NETCDF |
| FILE_NAME | <filename> |
A0132 |
| SUBDATASET_NAME | <subdataset_name> |
SUBDATASET_IMAGE_1 |
| FILE_NAME_AND_SUBDATASET_NAME | <filename_subdataset_name> |
A0132_SUBDATASET_IMAGE_1 |
Required/Optional
Required
Mapping File Syntax
FEATURE_TYPE_NAME FORMAT_NAME
Workbench Parameter
Feature Type Name(s)
REVERSE_VERTICAL_ORDER
NetCDF data may be ambiguous about whether the first row of data in the file corresponds to the top or bottom row of the raster. If data appears upside-down when reading a file, this option may be toggled to correct the problem.
Required/Optional
Optional
Values
YES | NO
WRITER_COMPATIBLE_ATTRIBUTES
Specifies whether the NetCDF reader should generate attributes that are compatible with the NetCDF writer. The format attributes in this document describe the case where this keyword is Yes.
Required/Optional
Optional
Values
YES | NO
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
EXPOSED_ATTRS
This directive allows the selection of format attributes to be explicitly added to the reader feature type.
This is similar to exposing format attributes on a reader feature type once it has been generated; however, it is even more powerful because it enables schema-driven applications other than Workbench to access and leverage these attributes as if they were explicitly on the schema as user attributes.
The result of picking a list of attributes is a comma-separated list of attribute names and types that will be added to the schema features. Currently all reader feature types will receive the same set of additional schema attributes for a given instance of the reader.
Required/Optional
Optional
Mapping File Syntax
Not applicable.
While it is possible for FME Objects applications to invoke this directive, the required format is not documented.
This directive is intended for use in our GUI applications (for example, Workbench) only.
Workbench Parameter
Additional Attributes to Expose