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TIFF Feature Representation

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

TIFF features specify a matrix of x, y, and z coordinates. For each raster, there will only be a single feature returned.

Attribute Name

Reader or Writer Attribute

Contents

tiff_type

 

This will always be tiff_raster.

tiff_area_or_point

Reader attribute

Indicates whether each raster pixel represents an area or point. The value can be Area or Point.

tiff_subdataset_name

 

When this is present on a feature, the feature is a subdataset. This attribute shows the name of the subdataset.

tiff_subdataset_description

 

When this is present on a feature, the feature is a subdataset. This attribute gives a description of the subdataset.

tiff_documentname

 

Represents the name of the document from which this image was scanned.

tiff_imagedescription

 

Represents a string that describes the subject of the image.

tiff_datetime

 

Represents a date and time of image creation. When writing, the string must have the following format to be accepted: “YYYYMMDDHHMMSS”, without any separator or delimiter. Hours range from 0 to 23.

tiff_software

 

Represents the name and version number of the software package(s) used to create the image.

tiff_resolutionunit

 

The unit of measurement for tiff_xresolution and tiff_yresolution. The possible values are 1, which means that there is no absolute unit of measurement and is usually used for images, 2, which means inches, and 3, which means centimeters.

tiff_xresolution

 

Represents the number of pixels per tiff_resolutionunit in the x direction.

tiff_yresolution

 

Represents the number of pixels per tiff_resolutionunit in the y direction.

tiff_artist

 

Represents the person who created the image. Some older TIFF files used this tag for storing copyright information.

tiff_copyright

 

Represents the copyright notice of the person or organization that claims the copyright to the image. The complete copyright statement should be listed in this field including any dates and statements of claims. For example, “Copyright, John Smith, 19xx. All rights reserved.”

tiff_hostcomputer

 

It represents the computer and/or operating system in use at the time of image creation.

tiff_maxsamplevalue   The maximum data value used.
tiff_minsamplevalue   The minimum data value used.
tiff_pyramid_num_levels   The number of generated pyramid levels (reader). Note that this does not include the original raster data.

tiff_pyramid_level{}.num_rows

tiff_pyramid_level{}.num_columns

 

The number of rows and columns in each pyramid level.

Note that pyramid level 0 indicates the original raster data, whereas level 1 indicates the first reduced-resolution pyramid level.