EASI provides an interface to image data built on top of GDB, a technology allowing access to data in many geomatics file formats in a uniform way. A database is a grouping of data layers usually referring to a single file, and can contain raster layers (channels), vector layers (or segments), lookup tables, and a variety of other auxiliary information.
A complete description may be found in the GDB documentation. Of particular interest is the section on the GDB data model.
Documentation on each of the EASI database access intrinsics is available in the CATALYST Professional Online Help. To illustrate various techniques, examples are presented there with detailed explanations.
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