详情

原文传递 GEOGRAPHIC INFORMATION SYSTEMS/GLOBAL POSITIONING SYSTEMS DESIGN FOR NETWORK TRAVEL TIME STUDY.

题名：	GEOGRAPHIC INFORMATION SYSTEMS/GLOBAL POSITIONING SYSTEMS DESIGN FOR NETWORK TRAVEL TIME STUDY.
作者：	Guo-B; Poling-AD
关键词：	GEOGRAPHIC-INFORMATION-SYSTEMS; GLOBAL-POSITIONING-SYSTEMS; TRANSPORTATION-NETWORKS; TRAVEL-TIME; PHOENIX-ARIZONA; MODULES-; SYSTEMS-DESIGN
摘要：	In October 1993, Maricopa Association of Governments (MAG) conducted travel speed and delay studies in the metropolitan Phoenix area. This paper concentrates on a Geographic Information System (GIS)/data base system approach to process the field data collected with Global Positioning System (GPS) units and portable computers after a brief discussion of the travel route selection and preparation and a brief comparison of the several different travel time survey techniques using the test vehicle method. The three system modules are described: the Field Data Conversion and Validation module uses the data base approach to combine the GPS data (position and speed) and event data into a data base format and uses ARC/INFO to check GPS run validity; the Link Topology Definition module extracts topological information of the selected travel routes by data base programming and ARC/INFO's Dynamic Segmentation; the Data Analysis and Reporting module structures the continuous GPS data on a link-by-link basis and calculates travel time, delay, and speed information for each link. This module also feeds the results to a SAS program for statistical analysis and to ARC/INFO for generating graphics reports. The system design is based on the interface between ARC/INFO 6.11 on the SUN Sparc Station and FoxPro 2.5 for DOS on PC.
总页数：	Transportation Research Record. 1995. (1497) pp135-139 (3 Fig., 2 Ref.)
报告类型：	科技报告