DTED (Digital Terrain Elevation Data) Reader/Writer

FME Format Type Identifier

DTED

Reader/Writer

Both

Typical File Extensions

.dt0, .dt1, .dt2

The DTED Digital Elevation Map (DEM) format is documented in the U.S. military standard MIL-PRF-89020B. For more information about the DTED file format, see the National Geospatial Agency website.

DTED is a continuous numeric raster format whose data is stored in 2-byte signed integers. The value -32767 is considered to be Nodata.

DTED Product and System Requirements

Format

Product

Operating System

Reader/Writer

FME Desktop License

FME Server

FME Cloud

Windows

Linux

Mac

Reader

Available in FME Professional Edition and higher

Yes

Yes

64-bit: Yes

Yes

Yes

Writer

Available in FME Professional Edition and higher

Yes

Yes

64-bit: Yes

Yes

Yes

Reader Overview

FME considers a single DTED file, or a folder containing a list of DTED files, to be a dataset. DTED files are raster files containing elevation data. Each elevation sample in each file is translated to a three-dimensional (3D) FME point feature or translated into a single raster feature.

Writer Overview

FME will write a set of point features or a set of raster features to one or more DTED cell files in a folder (the dataset). The folder need not exist before the translation occurs. Any old files in the folder may be overwritten with the new feature data without warning. New cell files are created as needed depending on the locations of point features received by the writer.

The Level (resolution), and various other metadata for the output files can be controlled with writer parameters.

The writer can optionally fill in missing values in the output file by inverse distance weighted interpolation.

Note: The DTED writer assumes that all incoming points and raster are in the LL-84 (lat/longWGS84) coordinate system. If this is not the case, the results will be inaccurate.

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  

DTED only supports rasters with a single numeric band.