Used to automatically convert one or more raster lines and to place a line string for each raster line which is converted.

The behavior of this function depends upon where it is started.

• If it is started along a raster line, this raster line is converted in both directions until a break point (raster intersection point, raster end point, or node) is hit. Only one line string is generated.

• If it is started at a free end of a raster line (on a raster end point), this raster line is converted in the only possible direction until a break point is hit. Only one line string is generated.

• If it is started at a raster intersection (on a raster intersection point), all raster branches are converted until a break point is hit. A line string is generated for each raster branch.

• If it is started from a node, a raster line is converted in every possible direction until a break point (raster intersection point, raster end point, or node) is hit. A line string is generated for each possible direction (that excludes a branch that is already converted).