Geospatial Interoperability Reference Architecture (GIRA): Increased Information Sharing Through Geospatial Interoperability [open pdf - 4MB]
"The Geospatial Interoperability Reference Architecture (GIRA) is aligned with current Federal policy, principles, and practices for Enterprise Architecture and further adds to the authoritative body of knowledge of geospatial architecture documentation. It is an unclassified document aimed at an audience consisting of; Executive Leaders, Program Managers, and Solution Architects across Federal, State, Local, Territorial and Tribal governments and private sector stakeholders. It is intended to be a practical roadmap to increase government geospatial information sharing through interoperable capabilities that result in reduced operational costs within and across mission systems. It documents geospatial and architecture policy alignment, references authoritative practices and provides practical guidance including; templates, charters, exchange agreements, baseline requirements matrices, architecture artifacts and tools. The GIRA is expected to have the following benefits:  Provide a reference guide for geospatial interoperable architectures to guide solutions to effectively govern, manage, support and achieve information sharing through geospatial system integration, acquisition and/ or development.  Provide documented architecture artifacts that can be used to support geospatial program technical oversight and technical assessments for geospatial investments. The GIRA provides a framework for the management, design and development of new or alignment of existing geospatial system/solution investments. It recommends guidance considerations in the areas of governance, business, data, applications/services, infrastructure, standards and security; and performance measures for validating and reporting results."
U.S. Information Sharing Environment: http://ise.gov/