- Extension
- .cal
- .xpm
- Format
- Binary
- Text
- Category
- Raster Image
- Raster Image
- Developer
- U.S. Department of Defense
- X Consortium
- Description
- The CALS raster file format, commonly known by the extension ".cal" or ".cals," is a bitmap file format designed primarily for the storage and interchange of digital images, especially in the field of computer-aided design (CAD) and engineering. Developed by the United States Department of Defense, it was intended to standardize the exchange of graphics data for electronic publishing of technical manuals. This format supports monochrome (1-bit) images and is distinguished by its efficient compression methods for reducing file sizes, facilitating easier storage and transmission. Despite its specific initial use case, the CALS raster format has found application in various industries for the archiving and sharing of high-resolution, scanned documents.
- The XPM (X11 Pixmap Graphic) file format is a plain text file format used to store pixmap images, which are pixel-based graphics. It is designed for use with the X Window System, commonly used in Unix and Linux environments. XPM files define images in a structured format, using ASCII text to describe each pixel's color and location within the image. This format supports both monochrome and color images and allows for the definition of custom color palettes.
- MIME Type
- image/cals
- image/x-xbitmap
