First Advisor

Ric Vrana

Term of Graduation

Fall 2000

Date of Publication

11-20-2000

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Geography

Department

Geography

Language

English

Subjects

Bus lines -- Oregon -- Portland Metropolitan Area, Geographic information systems, Global Positioning System, Tri-County Metropolitan Transportation District of Oregon

Physical Description

1 online resource (vii, 87 pages)

Abstract

Global Positioning System (GPS) technology is a viable tool for the collection and creation of Geographic Information System (GIS) databases. Organizations have turned their attention to using this tool to develop new databases for their existing GIS. The integration of these new GPS derived databases with older existing databases leads to both technical and organizational repercussions. With the integration of GPS derived data, an organization's existing GIS requires enhancements to GIS databases and the organization must be prepared to manage the integration.

This thesis examines the technical issues that occur due to integration and conflation of GPS data in an existing GIS and the resulting implications on organization management of the GIS. The primary investigation is a case study of a recent project by the Tri-County Metropolitan Transportation District of Portland, Oregon (Tri-Met) to develop a new bus stop database using GPS technology. Tri-Met's primary goal of this project was to develop and maintain an accurate database of bus stop locations and their attributes. Tri-Met began this project with the assumption that the GPS technology would produce a greater level of positional accuracy to better link with data produced by computer navigation and tracking system used on every bus.

The case study identifies technical issues involved with the integration of the GPS derived bus stop data. The GPS data integration 1) solved the bus data incompatibility problem, 2) solved the lack of spatial accuracy in areas where multiple bus stops exist at route intersections, and 3) enhanced the TIGER-based street centerlines (the base map of all Tri-Met operations). The case study also identifies the influence of the enhancements, to a series of databases, on the organization's management a practices.

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In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/

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Persistent Identifier

https://archives.pdx.edu/ds/psu/44692

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