Sustainability of Digital Formats
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| Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact | |


| Full name | TIFF Bitmap with LZW Compression |
|---|---|
| Description | A tag-based file format for storing and interchanging raster images; in this subtype, TIFF wraps a bitmap compressed using LZW (Lempel-Ziv-Welch Compression Encoding). |
| Production phase | Most often an initial-state or middle-state format; may serve as final-state format. |
| Relationship to other formats | |
| Subtype of | TIFF_6, TIFF, Revision 6.0 and earlier |
| Contains | LZW, LZW Compression Encoding |

| LC experience or existing holdings | See TIFF_6 |
|---|---|
| LC preference | TIFF is one of the preferred formats for bitmapped images, although TIFF_UNC and TIFF_G4 are preferred to TIFF_LZW. |

| Disclosure | See TIFF_6 |
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| Documentation | See TIFF_6 |
| Adoption | TIFF_LZW has seen some use in digital library projects but has not been as widely deployed as TIFF_UNC and TIFF_G4. TIFF_LZW is listed but not preferred for raster images in the list of FCLA recommended formats (Florida Center for Library Automation; www.fcla.edu/digitalArchive/pdfs/recFormats.pdf). |
| Licensing and patents | See LZW |
| Transparency | See LZW |
| Self-documentation | See TIFF_6 |
| External dependencies | None |
| Technical protection considerations | None |

| Still Image | |
|---|---|
| Normal rendering | Good support. |
| Clarity (high image resolution) | See TIFF_6. |
| Color maintenance | See TIFF_6 |
| Support for graphic effects and typography | See TIFF_6 |
| Functionality beyond normal rendering | See TIFF_6 |

| Tag | Value | Note |
|---|---|---|
| Filename extension | See related format. |
See TIFF_6 |
| Internet Media Type | See related format. |
See TIFF_6 |
| Magic numbers | See related format. |
See TIFF_6 |

| General | |
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| History |

See TIFF_6
See TIFF_6
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