The Linear Reference System (LRS) can localise events along a linear element using a measure. It is suitable for representation of data related to linear features like roads and rivers. The article describes a first implementation of the LRS in GRASS GIS. The data model and the new modules v.lrs.create, v.lrs.segment, v.lrs.stationing, v.lrs.where are discussed. These modules can be used to generate the LRS from input linear layer and mileposts, to georeference points and segments from the LRS to 2D/3D space and query LRS measure for points in 2D plane. An example is given for a large scale project MITRIS, in which thousands of events have been automatically georeferenced via LRS.
