GRTOOL
A Link-to-Grid Interface

by
Lukas and Heinz Spiess, EMME/2 Support Center

February 1994

Abstract:

GRTOOL is a set of macro and utility programs which provide an efficient link-to-grid interface in the context of the EMME/2 transportation planning software. Link based data, usually derived from network assignment results, can be transformed to a grid cell level, by splitting the link data according to the link's overlap with different grid cells, and accumulating it for each grid cell. Besides the program performing the link-to-grid conversion, GRTOOL also provides an EMME/2 macro for extracting link data, as well as a program to generate annotation files for displaying grid data within the framework of EMME/2 plots.

Copyright ©1994 EMME/2 Support Center, Aegerten, Switzerland. All rights reserved.

• Contents
• Introduction
• Link-to-Grid Conversion
• Installation of GRTOOL
  • Installation on MS-DOS Systems
  • Installation on UNIX Systems
• Working with GRTOOL
  • GRMACRO - EMME/2 Macro to Generate a Link Data File
  • GRLINK - Transform Link Data to Grid Data
  • GRPARAM - Define a Graphic Parameter File
  • GRANNOT - Generate Annotation from Grid Data File
• GRTOOL File Formats
  • Link Data File
  • Grid Data File
  • Graphic Parameter File
  • Annotation File
• An Example