Sequencing

Summary

Check and correct ordination and orientation of a stream network using a DEM.

Tags:
hydrography, ordination, orientation, network, polyline, dem

Usage

Mutliscale characterization of fluvial system is based on fluvial linear such as the hydrographic network or the centerline network. To ensure a consistent process, one of the necessary conditions is that networks must be (i) oriented, (ii) connected and (iii) relevant of the in-field configuration. Sequencing tool aiming at ordering and, if it is needed, flipping streams of a network, to ensure :

1. a good flow direction from upstream to downstream.
2. a good ordination of streams in order to spatially and hierarchically located them within a network.

[@roux2014]

Algorithm:

run Identify Network Nodes algorithm with input lines
run Drape algorithm with identified nodes and input DEM
run Check/Fix Link Orientation algorithm with draped nodes and identified lines

Parameters

Parameter	Description	Type
Polyline polyline	The linear network (or linear feature) which needs to be sequenced.	LineString or MultiLineString
Raw DEM rawdem	The raw DEM covering all the input network.	Raster
Oriented Network Oriented Network	The output sequenced linear network (or linear feature).	LineString

See Also

• Identify Network Nodes

• Drape Vectors

• Check/Fix Link Orientation