GIS-T APPLICATIONS

Introduction to GIS-T

Technological and conceptual developments led to the rise of Transportation-GIS (GIS-T) during 1980’s

GIS has got wide applications in transportation field

GIS packages like TransCAD and EMME are developed specifically for GIS-T

GIS and transportation Four major components of GIS which has specific

considerations for transportation are :

Encoding Management

Analysis Reporting

Encoding - Deals with issues concerning the representation of a transport system and its spatial components

Management - The encoded information is stored in a GIS database management system so that it can be organised

Analysis - Considers the wide array of tools and methodologies available for transport issues

Reporting - A GIS would not be complete without all its visualization and data reporting capabilities for both spatial and non-spatial data

GIS and transportation Contd.

Representation of a transportation system and components of GIS-T

GIS-T capabilities and applications

General GIS operations

Matrix operation

Modeling procedures

Data editing

Display

Buffering

Spatial search

Conditional query

General GIS operations

Data is stored in the form of matrix

Both rows and columns represent the same set of geographical features, either points such as cities or areas such as traffic analysis zones

Rows are usually regarded as the origins and the columns the destinations

It is called matrix view in GIS-T

Matrix operation

Typical Matrix (City Distance) Constructed using GIS

Topologically Integrated Geographic Encoding and Referencing (TIGER)

Shortest Path Analysis (SPA)

Vehicle (VRo) & Arc Routing (AR)

Spatial Interaction and Gravity Models

The Urban Transportation Systems Planning (UTSP)

GIS in Land Use Modeling

Freight Modeling

Public Policy Making

Modeling procedures

TransCAD

Mapinfo

EMME

Arc View

Geomedia

ESRI

Softwares for GIS-T

Developed by Caliper Corporation

First and only Geographic Information System (GIS) designed for use by transportation professionals

Used to store, display, manage, and analyze transportation data

TransCAD combines GIS and transportation modeling capabilities in a single integrated platform

TransCAD

Can be used for all modes of transportation, at any scale or level of detail

Can create high-quality map output using many of thematic mapping styles and options, unlimited colors, and fully-scalable line styles and true type map symbols

Provides specialized mapping functions for transportation applications

Includes sophisticated GIS features such as polygon overlay, buffering, and geocoding

TransCAD Contd.

It has an open system architecture that supports data sharing on local and wide-area networks

TransCAD is the only software package that fully integrates GIS with demand modeling and logistics functionality

Advantages :

Accurate, Efficient modeling process, brings new and much-needed capabilities for measuring geographic accessibility, provides a graphical solution that is easily understood

TransCAD Contd.

Provides location intelligence solutions through combining software, data (both spatial and non spatial) and consultancy with project management, systems design and development, training and support

Produces a wide range of software including Spatial Cartridges for databases (Spatial Ware), Routing, Geocoding (Mapmaker), Site Analysis, Risk Analysis, Market Analysis, and the Envies web services suite

Mapinfo

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