Meta Raster Format (MRF) Feature Representation

In addition to the generic FME feature attributes that FME Workbench adds to all features (see About Feature Type Attributes), this format also adds format-specific attributes (Format Attributes).

User attributes are not supported.

Because an MRF raster contains multiple pyramided levels, a single MRF will usually contain many features. Each of these features will have the following attributes.

Attribute Name

Contents

mrf_type

This will always be mrf_raster.

mrf_compression_strategy

JPEG, PNG, JPNG, TIFF, or NONE, indicating how the raster was compressed.

mrf_interleave_strategy

BIP (band interleaved by pixel) or BSQ (Band sequential interleave), indicating how the bands were interleaved.

mrf_pyramid_level

Indicates which level of the pyramid this raster defines.

mrf_pyramid_level{n}_num_[columns/rows]

Indicates the dimensions nth pyramid level. Will only be present on the base (0) pyramid level raster.

mrf_subdataset_description

A brief description of the subdataset.

mrf_subdataset_name

The internal name of the source subdataset.

mrf_tile_columns/rows

The dimensions of the current raster.

mrf_z_size

The number of z-slices. Will only be on the base (0) pyramid level raster.

mrf_z_slice

Identifies which z-slice this raster came from.