StreamShape

Converts a raster representing a raster linear network to a shapefile.

Usage tips

Map Algebra

The raster linear network should be represented as valid values on a background of NoData. There should be contiguous features with the same value, such as the result of the StreamOrder or StreamLink function. StreamShape should not be used on a raster in which there are few adjacent cells of the same value.

Learn more about how to specify the input raster dataset in the Map Algebra expression of Raster Calculator.

Map Algebra syntax

StreamShape(<net_grid>, <dir_grid>, {NOWEED | WEED})

Parameter	Explanation
<net_grid>	An integer raster representing a linear stream network.
<dir_grid>	A raster showing direction of flow out of each cell. This can be created using the FlowDirection function.
{NOWEED \| WEED}	Specifies whether weed tolerance will be used. {NOWEED} — No weeding is done. {WEED} — The weed tolerance, in map units, for generalization of arcs. The Douglas–Puecker algorithm is used for line generalization. A tolerance of sqrt(0.5) * cell size is used.

Parameter

Explanation

<net_grid>

An integer raster representing a linear stream network.

<dir_grid>

A raster showing direction of flow out of each cell. This can be created using the FlowDirection function.

{NOWEED | WEED}

Specifies whether weed tolerance will be used.

{WEED} — The weed tolerance, in map units, for generalization of arcs. The Douglas–Puecker algorithm is used for line generalization. A tolerance of sqrt(0.5) * cell size is used.

streamshape(strm_order, flowdir, noweed)
streamshape(strm_order, flowdir, weed)