Technical Issues in NOAA's Nautical Chart Program (1996) / Chapter Skim
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4 Technical Path to an Open System
4 Technical Path to an Open System
Pages 25-33
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From page 25... ...
CURRENT SOFTWARE TOOLS ANCS II is a digital chart production system developed for NOAA through a private vendor. ANCS II comprises six major custom software modules in addition to commercial software (approximate number of lines of custom code for each module is shown in parentheses)
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products and chart-finishing software used in ANCS II to compile and edit raster chart images. The data repository associated with SCARS/CAC consists of raster images representing each chart product.
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Task Management Automated task management is important for the efficient maintenance of nautical chart data and products. Migration and maintenance costs of the ANCS II task management components should be compared to the costs of COTS products that provide similar functions.
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From page 28... ...
As with the other elements of the ANCS II system, migration and maintenance costs of the NIDB software component could be compared to the cost of a COTS solution to the vector database requirement and serve as the basis for a decision to either (1) migrate all or part of the NIDB software to a sustainable operating environment or (2)
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From page 29... ...
Vector editing of output. Migrate ANCS II CGDB and chart-finishing software to a sustainable operating environment and develop software to convert vector data from the CGDB to a format suitable for export to electronic chart vendors and users (this requires loading the CGDB)
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, _ ., ~ . NAUTICAL CHART PROGRAM I Alternative 1 | ~ ANCS II ANCS II _ SourceP.' _ Source Logging ~Ed aluation Pit' ~ ANCS II NIDB Software I , ANCS II EC (to be den eloped)
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. NOAA has several choices for achieving the population of the NIDB: · using original hydrographic source data and compiling it into vector data · using the digitizing capabilities of ANCS II to populate the NIDB from paper-source photographic separates · using commercial contractors to digitize paper-source photographic separates · using digital data automated by the Defense Mapping Agency in the digital nautical chart format ANCS II Source p.v / _' Vector Themes Alternative 2 ANCS II Source .
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The requirement to move toward production of ECDIS (Electronic Chart Display and Information System) vector data would imply that a vector database of some type would still exist with content similar to the proposed ANCS II NIDB.
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From page 33... ...
recognizes that decisions must be made in the near future about the best options for fulfilling the functions of the digital nautical data management and production system. In light of the choices available to NOAA and discussed in this report, the plan would benefit from being modified to reflect more explicit decisions and to ensure that the necessary information to support these decisions is generated in a timely fashion.
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