Data Structures Technical Panel - DSTP
The Data Structures Technical Panel (DSTP) addresses the structural elements and semantics of data. It develops database structures and content models for classes of information that may be stored in "encyclopaedic databases" of geographic information from which data could be extracted to dynamically generate products.
The responsibilities of the DSTP are to:
- Develop standards for data structures for use in information
exchange and as the information elements within data services.
- Review interoperability requirements to determine which standards
are required to support interoperability and to establish Projects
to develop these standards.
- Ensure that the developed standards satisfy the interoperability
requirements while maintaining backward compatibility as required
with existing DIGEST based data products, and to ensure that the
standards are compatible with international standards and industrial
implementation specifications.
The Technical Panel interfaces externally with the standardization
efforts in ISO TC211, ISO/IEC JTC1 SC24, IHO, and other liaison
organizations. This interfacing will include making use of formal
liaison relationships and cooperative agreements as required, including
participating in, and preparing papers for ISO committees.
The DSTP is chaired by the USA (National Geospatial Intelligence
Agency)
DSTP Projects
The active DSTP Projects are:
D06 DGIWG Portrayal Registry Schema
SCOPE:
Develop an information model for portrayal of geospatial information and a schema for a portrayal registry, based on ISO 19117 (Geographic Information Portrayal), ISO 19135 (Geographic Information, Procedures for Item Registration), and portrayal-related OGC specifications and services.
DESCRIPTION:
The DGIWG Portrayal Registry will be an on line resource for authoritative symbol sets defined by symbol development organizations, and also for portrayal rule sets that link symbols with specific geographic features in a data set. The intended users are symbol and rule development organizations that maintain their symbols and rules in the registry, and also the general user community which uses the symbols and rules either directly, or through a feature or coverage portrayal service to render map images. This project is for the technical design of the registry. Implementation is covered in Project D22-Implementation of Prototype DGIWG Portrayal Registry.
D14 Topographic Symbols for Digital Display
SCOPE:
Develop the 'symbolizer' component of Open Geospatial Consortium (OGC) Symbology Encoding (SE) for the portrayal of topographic data on digital displays, in accordance with the DGIWG portrayal registry schema, for population of the DGIWG portrayal registry. Scope of this project EXCLUDES portrayal rules component of SE which links features/attributes to symbols, and will vary by nation.
DESCRIPTION:
Develop symbols for the digital display of topographic data for population in the DGIWG Portrayal Registry. This project will build upon previous work in DGIWG Projects D06-Schema for DGIWG Portrayal Registry, D22-Implementation of prototype DGIWG Portrayal Registry.
D15 Standard Symbols for 1:50,000 Topographic Line Map
SCOPE:
Develop symbols for the portrayal for geospatial information shown on a Topographic Line Map (1:50,000). Scope of project EXCLUDES portrayal rules which link features/attributes to symbols, and will vary by nation.
DESCRIPTION:
Build upon previous work in DGIWG Projects D06-Schema for DGIWG Portrayal Registry, D22-Implementation of prototype DGIWG Portrayal Registry, and D28-DGIWG Portrayal Standard for MGCP Data, and develop symbols to portray a standard 1:50,000 Scale Topographic Line Map by expanding and modifying where necessary the DGIWG Portrayal Standard for MGCP Data (D28) and hosting them in the DGIWG Portrayal Registry.
D22 Implementation of Prototype DGIWG Portrayal Registry
SCOPE:
Use schema from Project D06 to implement a prototype DGIWG Portrayal Registry using GeoSym as the initial registry content. Additionally, determine transfer/delivery format for symbols and rules in standards-based service oriented architecture.
DESCRIPTION:
This project builds on the schema design from Project D06 and implements a prototype DGIWG Portrayal Registry. The initial content of the portrayal registry is NGA Geospatial Symbols for Digital Display (GeoSym) and the DGIWG Portrayal Standard for Multinational Geospatial Co-Production Program (MGCP) Data. The registry will be developed in phases that deliver additional capabilities, including registration and register management, input of change proposals, and output of portrayal data in Open Geospatial Consortium (OGC) Symbology Encoding (SE) and human readable form.
D26 Register Administration
SCOPE:
The project is to define and create an administrative tool for the management of geospatial information item registers and respective content.
DESCRIPTION:
The management of the DGIWG Registers is a manual operation. In order to start a maintenance mode, and to establish the DFDD management procedures described in the 'Implementation Guide to the DGIWG Feature Data Dictionary,' an administration tool is needed. The intent of this project is to define the requirements for a register management tool; create and establish a register management tool based on defined requirements; and prepare documentation which defines procedures for using the register management tool.
D30 NATO MGID Transformation (MGID Support)
SCOPE:
Create a set of topographic base models and schemas that will enable the discovery, exchange, and usage of geospatial information.
DESCRIPTION:
Address the transformation of the NATO Military Geographic Information and Documentation (MGID). Create a single topographic base model, and thematic extensions, for the derivation of geospatial products.
D31 Metadata profiles and guidelines for use within the military
SCOPE:
Establish DGIWG metadata profiles and guidelines for use within the military community considering the revision of the ISO/TC 211 standards.
DESCRIPTION:
To follow the revisions of the ISO metadata related standards and to revise the DGIWG profile and metadata register to align with these changes, and to address additional DGIWG metadata requirements.
D32 Elevation Surface Model (ESM)/ High Resolution Elevation (HRE)
SCOPE:
Develop standard data model(s) for elevation data for DGIWG nations through profiling of existing international standards (e.g ISO 19123 : coverage). The profile shall address the various options for elevation surface types (bare earth, reflective surface, bathymetric...) and data structure (grid, contour line, TINs, points). Collection and exploitation methods shall not be addressed.
DESCRIPTION:
This project aims to provide a standard data model(s) and exchange guidance for elevation data which addresses the needs and requirements of military community, especially for higher resolutions of elevation data.
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