HowTo: Create a threshold raster to be used as an input for the Spatial Analyst Hydrology tools
【相关信息】
Article ID: 42068
Software:
ArcGIS - ArcEditor 10
ArcGIS - ArcInfo 10
ArcGIS - ArcView 10
ArcGIS for Desktop Advanced 10.1, 10.2
ArcGIS for Desktop Standard 10.1, 10.2
ArcGIS for Desktop Basic 10.1, 10.2
Platforms:
Windows Windows 7, Windows 8, Server 2008 R2
【问题描述】
Creating a watershed requires computing the flow direction across a Digital Elevation Model (DEM) as well as defining the locations used to determine the catchment area. A point feature class is often used as the ‘feature pour point data;’ however, the Watershed geoprocessing (GP) tool also accepts a flow accumulation threshold raster. Using a threshold raster is particularly useful when pour points do not exist and watersheds need to be generated for the entire DEM based on the junctions of a stream network that has been derived from flow accumulation.
Article ID: 42068
Software:
ArcGIS - ArcEditor 10
ArcGIS - ArcInfo 10
ArcGIS - ArcView 10
ArcGIS for Desktop Advanced 10.1, 10.2
ArcGIS for Desktop Standard 10.1, 10.2
ArcGIS for Desktop Basic 10.1, 10.2
Platforms:
Windows Windows 7, Windows 8, Server 2008 R2
【问题描述】
Creating a watershed requires computing the flow direction across a Digital Elevation Model (DEM) as well as defining the locations used to determine the catchment area. A point feature class is often used as the ‘feature pour point data;’ however, the Watershed geoprocessing (GP) tool also accepts a flow accumulation threshold raster. Using a threshold raster is particularly useful when pour points do not exist and watersheds need to be generated for the entire DEM based on the junctions of a stream network that has been derived from flow accumulation.
1 个回复
EsriSupport
赞同来自:
The threshold raster defines the cell values that are determined to have enough accumulation to be classified as a stream, and the threshold raster is generated from a raster created by the Flow Accumulation GP tool.
Creating a depressionless DEM
Understanding drainage systems
【创建及修改时间】
Created: 12/30/2013
Last Modified: 1/10/2014
【原文链接】
http://support.esri.com/en/kno ... 42068
要回复问题请先登录或注册