ArcGIS Tutorial: How Raster River network vectorization works

The algorithm used by the raster stream vectorization tool is primarily used to vectorize a raster of a river network or any other raster linear network that represents a known direction.

The tool has been optimized to use directional rasters to help vectorize intersecting cells and neighboring cells. An adjacent raster stream with the same value of two can be vectorized to two parallel lines. This is in contrast to the raster jog Line (Polyline) tool, which usually prefers to fold lines together.

To visualize this difference, the following shows the input stream network, which compares the analog output of the raster network vectorization with the analog output of the raster jog Line (Polyline).

　　

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ArcGIS Tutorial: How Raster River network vectorization works