Hugo Mercier

Open source engines for trip planning are growing in popularity. We are part of the movement by creating our own engine and a framework for the development of new algorithms.

Tempus focuses on planning trips that involve all possible transport modalities, mixing private and public modes as well as shared vehicles, and on requests with multiple objectives.

It relies on well-known open source components and standards like PostGIS, QGIS, WPS, boost graph and offers tools for importing routing data from various sources, including OpenStreetMap.

This presentation will illustrate the overall modular architecture of Tempus built around a C++ core and will detail recent additions to the engine, like the integration of Contraction Hierarchies, thanks to industial parternships.

Open source engines for trip planning are growing in popularity. We are part of the movement by creating our own engine and a framework for the development of new algorithms. Tempus focuses on planning trips that involve all possible transport modalities, mixing private and public modes as well as shared vehicles, and on requests with multiple objectives. It relies on well-known open source components and standards like PostGIS, QGIS, WPS, boost graph and offers tools for importing routing data from various sources, including OpenStreetMap. This presentation will illustrate the overall modular architecture of Tempus built around a C++ core and give some insights on how to use it either as a user or as a developer of planning algorithms.

Polygonal meshes are the most common way of representing 2D geometries for simulation purposes. Integrating simulation to a GIS requires storing georeferenced meshes in a databases (or using standard SIG file formats), and being able to use simulation values interpolated over the elements as a map layer.

This presentation reviews what is the closest you can get with existing FOSS GIS solutions and what is needed to bridge the gap, both on the simulation side and on the GIS side.

We show the few lines that need to be added to the simulation code to read a mesh from the GIS and write the results to the GIS. We also present a prototype mesh layer for QGIS that has been implemented as a PluginLayer.