I am using a road map in shapefile format in order to calculate a route between two points. The map is downloaded from OpenStreetMap and it has small unconnected lines that are messing up my routing.
Is there any way that I could get rid of those without having to manually remove them one by one? The lines look like this: http://screencast.com/t/4jnQFx57
You could calculate a buffer (not more than 5 meters) for the start- and endpoint of every linestring. Then, intersect the buffer with the road network. A line that doesn't intersect with the buffer is likely to be a "correct" unconnected road. However, you'll have to play with the buffer radius for satisfactory results.
Perhaps use the Spatial Query to select all lines that intersect or touch or overlap other lines. Then could you invert the selection (to select all lines that do not intersect, touch or overlap) and delete the lines?
Perhaps the topology checker could work to help you select or identify lines not touching other lines.
