MIL-PRF-89040A

Abstract

This specification defines the content and format requirements of the Defense mapping Agency's (DMA) Interim Terrain Data (ITD) product in the Vector Product Format (VPF). This product will replace the current ITD for users requiring this data on Compact Disc - Read Only Memory (CD-ROM). The data base from which VITD is produced is referred to as the Terrain Analysis Data Set (TADS). <br>The purpose of this specification is to assure uniformity of treatment among all mapping and charting elements engaged in a coordinated production program for this product. VITD is a vector-based digital product that portrays selected military geographic information containing features of tactical military significance in a standardized georelational structure. VITD is designed to support tactical military and Geographic Information System (GIS) applications for selected geographic areas. <br>The VITD is primarily based on the feature content of the ITD (MIL-I-89014) produced by DMA. In turn, the ITD is based on the content and feature definitions contained <strong><b>Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Director, Defense Mapping Agency, ATTN: ATC, ST A-13, 8613 Lee Highway, Fairfax, VA 22031-2137, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.</b></strong> in DMA's Tactical Terrain Analysis Data Base (TTADB) (MIL-T-89304). Sources used in the compilation of this product may include information derived from aerial photography, topographic maps, soil surveys, hydrographic studies, land use inventories, and transportation reports. Information may have been derived from hardcopy TTADBs at a scale of 1:50,000 or conversion from ITD in Standard Linear Format (SLF). VITD, ITD, and TTADB are all individually organized into single subject thematic overlays, files, or layers/coverages consisting of Surface Configuration (Slope), Vegetation, Surface Materials (Soils), Surface Drainage, Transportation (ITD and VITD have enhanced road networks), and Obstacles. Thus, VITD feature and attribute content is consistent with associated hardcopy TTADB products. These products cover only selected areas of the world. <b><u>Intended Use:</u></b> The VITD is a product developed to satisfy the armed services short and mid-term requirements for digital terrain analysis data on CD-ROM to support tactical military and C³I GIS systems, emphasizing use among ground forces. The analytical use of VITD data at a scale greater than 1:50,000 may be limited as the result of source material used in compilation. <br>