Name of the element to describe input parameters. URL of input elevation file. Default data format is GeoTIFF. Threshold tangential curvature. Threshold flow accumulation. Format of output file. Type of output file if outputFormatType is specified as GeoTIFF. Always return URL and Format of output file. URL of output file to contain stream segments. Format of output file. Name of the element to describe input parameters. URL of input elevation file. Default data format is GeoTIFF. Threshold flow accumulation. Format of output file. Type of output file if outputFormatType is specified as GeoTIFF. Always return URL and Format of output file. URL of output file to contain stream segments. Format of output file. Name of the element to describe input parameters. URL of input elevation file. Default data format is GeoTIFF. Threshold tangential curvature. Threshold flow accumulation. Format of output file. Type of output file if outputFormatType is specified as GeoTIFF. Always return URL and Format of output file. URL of output file to contain stream segments. Format of output file. Format of output file. Format of output file will be GeoTIFF. GeoTIFF is a metadata format, which provides geographic information to associate with the image data. Format of output file will be TIFF. TIFF (Tagged Image File Format) is a flexible image format that normally saves 8 or 16 bits per color – red, green and blue – for a total of 24 or 48 bits. The TIFF file structure allows both the metadata and the image data to be encoded into the same file. Format of output file will be ESRI_Shapefile. A shapefile stores nontopological geometry and attribute information for the spatial features in a data set. The geometry for a feature is stored as a shape comprising a set of vector coordinates. Type of output file if the outputFormatType is specified as GeoTIFF. Type of output GeoTIFF file will be Byte - 8-bit unsigned integer. Type of output GeoTIFF file will be Int16 - 16-bit signed integer. Type of output GeoTIFF file will be UInt16 - 16-bit unsigned integer. Type of output GeoTIFF file will be UInt32 - 32-bit unsigned integer. Type of output GeoTIFF file will be Int32 - 32-bit signed integer. Type of output GeoTIFF file will be Float32 - 32-bit floating point. Type of output GeoTIFF file will be Float64 - 64-bit floating point. Type of output GeoTIFF file will be CInt16 - Complex 16-bit signed integer (ie. two Int16's one representing the real component, and one the imaginary component). Type of output GeoTIFF file will be CInt32 - Complex 32-bit signed integer. Type of output GeoTIFF file will be CFloat32 - Complex 32-bit floating point. Type of output GeoTIFF file will be CFloat64 - Complex 64-bit floating point. Derive stream network from DEM based on topographic curvature. Use morphology based algorithm to compute curvature and flow accumulation, then threshold them to derive stream network. The processing could be slow and lengthy. Derive stream network from DEM based on flow direction. Use r.watershed hydrological module in GRASS GIS software to compute flow accumulation, select a treshold to extract stream network from the accumulation. Derive stream network from DEM based on topographic curvature. To improve the speed of calculation, curvature is approximately derived by convoluting DEM with a 9×9 Laplacian filter. Extract stream network from digital elevation model (DEM). This service provides three methods for deriving stream network.