ADRG (ARC Digitized Raster Graphics) Reader

Licensing options for this format begin with FME Desktop Professional Edition.

The ADRG Reader module enables FME to access data in the ADRG (ARC Digitized Raster Graphics) format.


ADRG is a standard National Imagery and Mapping Agency (NIMA) digital product designed to support applications that require a raster map background display.

ADRG is a military format that conforms to the ISO 8211 standard.

ADRG data is divided into geographic data sets as Distribution Rectangles (DRs). ADRG folders contain a general information file (.GEN extension) and one or more ADRG zone distribution rectangle (ZDR) image files (.IMG extension). The GEN file provides image parameters and support data for the ZDR image files associated with a DR. For each dataset, image data within a ZDR image file is returned as a single feature, since this feature will contain the entire image data of one ZDR image file.

All ADRG data is assumed to be in LL84. Data in polar zones will be automatically converted to LL84, which may result in some distortion of the image.

Reader Overview

FME considers a single ADRG general information file to be a dataset. The ADRG general information file contains the ZDR image file names. The image files are raster files containing pixel data, and each pixel in the file is a point in a single FME raster feature.

FME Raster Features

FME raster features represent raster data and use several concepts that are unlike those used in the handling of vector data. The topics below describe how FME processes raster data.

About FME Rasters Tiling and Mosaicking
Raster Properties Band Combining and Separating
Band Properties Band and Palette Selection
Palette Properties Raster Processing
Compression Raster versus Vector Features
Pyramiding Raster File Naming
Interleaving World Files
Interpretation and Data Type TAB Files
Palette Resolution  

ADRG only supports rasters that have a Red8 band, a Green8 band, and a Blue8 band.