Package ilog.views.maps.format.cadrg

This package contains classes for reading CADRG files.

See: Description

Class Summary

Class	Description
IlvCADRGCoverage	This class stores information about a CADRG coverage as described in a CADRG table of contents.
IlvCADRGFrame	This class defines a CADRG frame as described in the CADRG table of contents.
IlvCADRGFrameReader	This class is used to read CADGR frames.
IlvCADRGLayer	This class implements a CADRG layer that displays a CADRG coverage using the load-on-demand mechanism.
IlvCADRGTocReader	This reader reads the table of contents of a CADRG file.

Package ilog.views.maps.format.cadrg Description

This package contains classes for reading CADRG files.

About the CADRG Format

The Compressed ARC Digitized Raster Graphics (CADRG) format is a map format for scanned maps, which is published by the US National Imagery and Mapping Agency (NIMA).

The CADRG readers provided in this package are based on the specification document MIL-C-89038 of October 6th, 1994. Specification can be downloaded from http://earth-info.nga.mil/publications/specs/

Basically, a CADRG data base covers an area with scanned maps of various scales. It is composed of a main directory that includes a table of contents file, called A.TOC, which can be read with an IlvCADRGTocReader. This main directory is divided into subdirectories, each corresponding to a specific coverage. These subdirectories contain the CADRG frames that make up the coverage. These frames can be read with a IlvCADRGFrameReader.

To automatically read a CADRG coverage using the Perforce JViews load-on-demand mechanism, you can use an IlvCADRGLayer.

CADRG data is distributed on CD-ROM by NGA. A sample CADRG data base is provided on the data disk.

Since:

Perforce JViews 3.0