Special variables

A number of special variables are available within an EASI model region. These variables may not be assigned to, but rather are set to appropriate values by EASI, and are available for use within the model.

@x current x (pixel) processing location
@y current y (line ) processing location
@dbx size of database in x (pixel) direction
@dby size of database in y (line ) direction
@meterx size of a pixel in x direction in meters
@metery size of a pixel in y direction in meters
@geox x georeferenced center of current pixel
@geoy y georeferenced center of current pixel
@sizex x size of a pixel in georeferenced units
@sizey y size of a pixel in georeferenced units

In addition to the Modeling expressions described above, the body of a MODEL statement may include other EASI statements, such as IF statements, to perform more complex operations.