GEM Raster

File Format
Name	GEM Raster
Ontology	Electronic File Formats Graphics GEM Raster
Extension(s)	.img
PRONOM	x-fmt/159
Released	1985

GEM Raster (or GEM VDI Bit Image, GEM Bit Image, GEM Image, GEM Bitmap) is an image file format originally associated with the GEM operating environment by Digital Research. It was used by GEM Paint and Ventura Publisher, and apparently was widely supported by Atari ST software.

Identification

Files begin with hex bytes 00 01 00 08 or 00 01 00 09.

Specifications

• http://www.fileformat.info/format/gemraster/spec/index.htm
• GEM VDI Reference Guide (v2.0), Appendix G
• GEM/3 Programmer's Toolkit, Release 3.1 Supplement, sec. 9 p. 22
• Format of GEM bitmap

Software

• Netpbm: pbmtogem, gemtopnm

Sample files

• http://www.fileformat.info/format/gemraster/sample/index.htm
• http://cd.textfiles.com/clipart1996/BUSI/OTHER/
• http://cd.textfiles.com/clipart1996/TYPE/OTHER/
• http://cd.textfiles.com/fantaziasampler/CLIPART/IMG/

See also

• GEM VDI Metafile

Links

• GEM Raster File Format Summary, from the Encyclopedia of Graphics File Formats