See: Description
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.
|
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 Rogue Wave 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.
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