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NCJ Number: NCJ 237987     Find in a Library
Title: Semi-Automated Processing and Incorporation of 3D Geo-Coding Extensions to Commercial Buildings for Emergency Response Applications
  Document URL: PDF 
Author(s): Bill Ribarsky ; Kalpathi Subramanian ; Jianfei Liu ; Kyle Lyons ; Onyewichi Obirieze
Date Published: 03/2012
Page Count: 10
  Annotation: This report describes new automation tools for processing two-dimensional data on a commercial building’s geometry, so as to facilitate the visualizing of the building’s layout, which is important in planning a law enforcement response to a critical incident in the building.
Abstract: The report presents new tools for automatically processing building data from their original two-dimensional (2D) CAD (computer aided design) files into a three-dimensional (3D) graph representation. This involves four steps. The first step involves data acquisition/preprocessing. This step starts with the raw CAD files, georeferences the data to a base map, and does ensures that data are accurate and consistent. The second step involves the creation of an “adjacency graph,” which consists of deriving spatial adjacency relationships from the raw polygon data in the CAD files, resulting in a 2D graph for each floor of the building. The third step pertains to “centerline extraction.” In this step, a distance transform-based algorithm is used to extract automatically the centerline (medial axis) of the hallway polygons that typically compose the evacuation routes for the building. The final step involves the “building graph construction.” In this step, the adjacency graph and extracted centerline are used to determine the rooms adjacent to the centerline and build a 2D network for each floor. These 2D networks are then combined with the stairways, elevators, and building entrances, resulting in the 3D building network. This report also describes initial work on extending the system to a mobile platform. In addition, work is reported on integrating an evacuation model into the framework. The proposed methodology has been used to process 22 academic buildings at the University of North Carolina at Charlotte. 9 figures, 2 tables, and 24 references
Main Term(s): Police policies and procedures
Index Term(s): Emergency procedures ; Police emergency planning ; Police planning ; Building searches ; NIJ final report
Sponsoring Agency: National Institute of Justice (NIJ)
US Department of Justice
Office of Justice Programs
United States of America
Grant Number: 2007-DE-BX-K010
Sale Source: National Institute of Justice/NCJRS
Box 6000
Rockville, MD 20849
United States of America

NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
Type: Instructional Material ; Program/Project Description
Country: United States of America
Language: English
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