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• Description
• Release Information
• Features
• Limitations
• System Requirements
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DESCRIPTION

This free tool converts National Geospatial-Intelligence Agency (NGA) Digital Terrain Elevation Data (DTED) elevation, ArcInfo ASCII Grid, and U.S. Geological Survey (USGS) DEM ASCII data into SEDRIS Transmittal Format (STF).

NOTE: For a complete description of the DTED specification, please refer to MIL-PRF 89020B, which can be found at the NGA web site.

This application was formerly known as the DTED to STF Converter. The name was changed with this version release specifically because the application is capable of much more than just conversion of DTED to STF, and it is easily expandable to encompass the conversion of other grid or raster formats to STF as well.

RELEASE INFORMATION

The current release version of this application is 4.0.0.2. This tool is SEDRIS 4.0.1 compliant.

The application is linked statically, and additional documentation is included in the download. You do not need to download or install the SEDRIS SDK to use this tool.

FEATURES

This release of the GRIDS application, which is compatible with SEDRIS SDK 4.0.1, has the following features:

• Processes all levels of DTED.
• Processes multiple-levels of DTED in one STF.
• Represents accuracy records as Data Quality <Areal Feature> instances.
• Incorporates DMED data into STF and associates it with the corresponding DTED data.
• Incorporates all header data from UHL, DSI, and ACC into appropriate SEDRIS classes.
• Uses ONC.DIR file to provide a <Cross Reference> for each DTED cell to an Operational Nautical Chart (ONC).
• Allows path specifications to each level of DTED data, which allows access to multiple DTED levels on different CDs or mounted hard drives.
• The user may select a range of DTED cells, a specific number of individual DTED cells, or all DTED cells under the specified DTED paths.
• Allows path specifications to multiple ArcInfo ASCII Grid data sources, which allows access to data on different CDs or mounted hard drives.
• The user may select a specific number of individual ArcInfo ASCII data sources, or may select all data sources with a specific file extension under the specified data paths.
• The user may select a specific number of individual USGS DEM data sources, or may select all data sources with a specific file extension under the specified data paths.
• Allows multiple DEM SRFs through building of multiple <Environment Root>s
• Handles all 5 types of USGS DEM ASCII.
• The user can add references to multiple media files, which are stored as <Browse Media> objects on the resulting transmittal.
• The application's GUI creates an easy to use, intuitive interface, which accentuates the application's setup flexibility.

GRIDS Main Window

GRIDS Processing Status Window

LIMITATIONS

• Some real-valued <Property Value> instances are created from DTED data using EUC_UNITLESS rather than the correct units of measure for the quantity being represented.
• Some <Property Grid> instances are created from DTED data using an incorrect offset from the corresponding <Property Grid Hook Point>.
• The feature_topology_level of the Data Quality topology is always set to level zero, regardless of the actual level of the topology.
• The current maximum number of different source data paths is limited to 10.
• No support for hierarchy summaries.
• It doesn't publish anything for use with ITR.
• Mixed case file / directory names are not supported on Unix platforms.

SYSTEM REQUIREMENTS

Hardware

• Recommended minimum CPU speed for Intel based machines is 200 MHz.
• Recommended minimum RAM for all supported platforms is 32 MB.
• Minimum disk space required is 10 MB. When converting data, it is recommended to have at least as much free disk space available as the size of the data to be converted.

Software

• Operating Systems Supported:
  • Microsoft Windows 98/ME/NT/2000/XP
  • Linux (2.4.20-8 kernel) with glibc(2.3.2)
  • Mac OS X
• Software Requirements:
  • Java JRE version 1.4 or better (needed for GUI)

POINT OF CONTACT

Send email to help@sedris.org for questions or assistance in using this application.

As a minimum, please provide the following in your email:

• application name
• application version
• hardware architecture
• OS name and version
• detailed problem description

PLANNED IMPROVEMENTS

• Currently looking into adding new data formats (for example GeoTIFF).
• Working on adding a DTED directory / file layout validator, to help users with non-standard DTED directory / file layouts. The validator will assist the user to fix the non-standard layout for use with this application as per the NGA DTED specification.
• Enhancing GUI use and help documentation.
• Support for automatic creation of resolution file for <Browse Media> objects that have been added to the transmittal.

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