Development of a Data Exchange Protocol between EMME/2 and ArcInfo

  ly invested in the creation of databases (be it at the city, county, or state levels) to manage spatial information within a GIS, it would be beneficial to be able to share data and analysis results in order to expand the database.

It is costly to maintain different databases for different applications in different departments. Therefore, the goal is to integrate these databases into a common multi-purpose database. Our efforts serve as a contribution towards the compatibility of spatial information, as requested by the GIS community.

In this paper we consider ArcInfo as the GIS software package, and EMME/2 as the transportation planning software package.

B) Objectives

The objectives of this project are:

• To establish the relationship between features and attributes in both software packages;

• To establish guidelines to create a standard information structure that corresponds to a transportation planning infrastructure in ArcInfo;

• To implement a prototype application following these guidelines to ease the data transfer process between the two software packages.

C) Data models of ArcInfo and EMME/2

C1) EMME/2 road and transit network data model

The EMME/2 data model is divided into three main categories:

• Network: it describes the transportation infrastructure, and is defined by the following elements:
  • modes: they are grouped in four types:
    • auto mode
      
    • transit modes (ex.: bus, train, tramway)
      
    • auxiliary transit modes (ex.: pedestrian)
      
    • auxiliary auto modes (ex.: trucks, high occupancy vehicles)

  • base network: both road and transit networks are highly integrated in what is calLED the base network; it consists of nodes and

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