# EPANET: [BACKDROP]

[BACKDROP]

Purpose:

Identifies a backdrop image and dimensions for visualizing the network's layout.

Formats:

DIMENSIONS | LLx LLy URx URy
UNITS | FEET/METERS/DEGREES/NONE
FILE | filename
OFFSET | X Y

Definitions:

DIMENSIONS provides the X and Y coordinates of the lower-left and upper-right corners of the network's bounding rectangle. Defaults are the extents of the nodal coordinates supplied in the [COORDINATES] section.

UNITS specifies the units that the network's dimensions are given in. Default is NONE.

FILE supplies the name of the file that contains a backdrop image for the network.

OFFSET lists the X and Y distance that the upper-left corner of the backdrop image is offset from the upper-left corner of the network's bounding rectangle. Default is zero offset.

Remarks:

1. The [BACKDROP] section is optional and only provides support for an external GUI program that uses the EPANET engine.
2. Only Windows Enhanced Metafiles and bitmap files can be used as backdrops.