Last week OC Transpo, the City of Ottawa’s transit service, unveiled a new network map (PDF) that shows the transit routes that will be in effect after the new LRT opens, which is (at the moment) scheduled to take place in November. From a cartographic perspective, what’s interesting is that OC Transpo’s new map adopts a diagrammatic, non-geographical design after years of their maps simply overlaying transit lines over a city map (see, for example, the latest, pre-LRT transit map, PDF). The approach allows the map to enlarge the more densely served core and inner suburbs and shrink the larger, but less service-dense outer suburbs—which is exactly what diagrammatic transit maps of sprawling cities are good for.