Stream network for the SAFE Project derived from SRTM data

This zipfile contains linear geometries showing a channel network across the SAFE Project landscape. The network was calculated using the GRASS hydrology tool r.stream.extract from SRTM elevation data and the resulting flow accumulation predictions (see https://zenodo.org/record/3490488 and https://zenodo.org/record/3490687).

Note that these networks are derived entirely from remotely sensed data, but do form a single interconnected network across the wider SAFE landscape. Other stream network data are available () but the provenance of these are not well known and they only cover part of the SAFE network.

Details of the geoprocessing can be found here: https://www.safeproject.net/dokuwiki/safe_gis/stream_networks.

Project: This dataset was collected as part of the following SAFE research project: SAFE CORE DATA

XML metadata: GEMINI compliant metadata for this dataset is available here

Files: This dataset consists of 2 files: SAFE_SRTM_Stream_network_metadata.xlsx, SRTM_Channels_network.zip

SAFE_SRTM_Stream_network_metadata.xlsx

This file only contains metadata for the files below

SRTM_Channels_network.zip

Description: Shapefile containing 54413 calculated segments forming a channel network across the wider SAFE landscape.

This file contains 1 data tables:

1. Feature properties (described in worksheet Properties)

   Description: Field descriptions for shapefile properties

   Number of fields: 17

   Number of data rows: Unavailable (table metadata description only).

   Fields:

   • cat: Identity of segment (Field type: id)
   • type_cd: Segment type (see also type) (Field type: numeric)
   • ID: Identity of segment (Field type: id)
   • length: Length of network segment (Field type: numeric)
   • n_ponts: Number of points in segment (Field type: numeric)
   • sourceX: X coordinate of source point of segment (Field type: numeric)
   • sourceY: Y coordinate of source point of segment (Field type: numeric)
   • sinkX: X coordinate of sink point of segment (Field type: numeric)
   • sinkY: Y coordinate of sink point of segment (Field type: numeric)
   • type: Segment type - is the segment a source or outflow segment (connected at one end only, type_cd = 0) or internal (connected at both ends, type_cd=1) (Field type: categorical)
   • snkChnn: Identity of sink channel for this segment (Field type: id)
   • srcChnn: Identities of source channels for this segment (Field type: id)
   • nSourcs: Count of source channels (Field type: numeric)
   • sorcElv: Elevation of start point of segment (Field type: numeric)
   • sinkElv: Elevation of sink point of segment (Field type: numeric)
   • sorcFlw: Incoming flow at segment source (Field type: numeric)
   • sinkFlw: Outgoing flow at segment sink (Field type: numeric)

Date range: 2010-10-01 to 2019-10-01

Latitudinal extent: 4.0223 to 5.9761

Longitudinal extent: 116.0242 to 117.9758