GRASS-GIS orchestration using pyWPS

Created: 2011-04-18 09:50:43 Last updated: 2011-04-25 15:21:35

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Generic workflow that run r.watershed, with auxiliary services: r.math and geotiff2png. Watershed accumulation is calculated from DEM using r.watershed, the accumulation result is then filtered using r.math with equation: output=(if(a>10,a,null())) The resulting geotiff is converted into a PNG for easy analysis in Taverna. Note: The DEM used contains values below 0, this affect the quality of the final result.

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Descriptions (2)

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Processors (17)

Name	Type	Description
SRTM	stringconstant	Value http://rsg.pml.ac.uk/wps/testdata/elev_srtm_30m.tif
ExecuteProcess_r.watershed	wsdl	Wsdl http://rsg.pml.ac.uk/wps/raster.wsdl Wsdl Operation ExecuteProcess_r.watershed
ExecuteProcess_r.watershed_DataInputs	xmlsplitter
threshold_value_100	stringconstant	Value 100
ExecuteProcess_r.watershed_ProcessOutputs	xmlsplitter
ExecuteProcess_r.math	wsdl	Wsdl http://rsg.pml.ac.uk/wps/raster.wsdl Wsdl Operation ExecuteProcess_r.math
ExecuteProcess_r.math_DataInputs	xmlsplitter
math_gt_10	stringconstant	Value output=(if(a>1000,a,null()))
ExecuteProcess_r.math_ProcessOutputs	xmlsplitter
Decode_Base_64_to_byte_Array_2	localworker	Script import org.apache.commons.codec.binary.Base64; bytes = Base64.decodeBase64(base64.getBytes());
ExecuteProcess_geotiff2png	wsdl	Wsdl http://rsg.pml.ac.uk/wps/generic.cgi?WSDL Wsdl Operation ExecuteProcess_geotiff2png
ExecuteProcess_geotiff2png_DataInputs	xmlsplitter
ExecuteProcess_geotiff2png_ProcessOutputs	xmlsplitter
ExecuteProcess_geotiff2png_2	wsdl	Wsdl http://rsg.pml.ac.uk/wps/generic.wsdl Wsdl Operation ExecuteProcess_geotiff2png
ExecuteProcess_geotiff2png_2_ProcessOutputs	xmlsplitter
Decode_Base_64_to_byte_Array	localworker	Script import org.apache.commons.codec.binary.Base64; bytes = Base64.decodeBase64(base64.getBytes());
ExecuteProcess_geotiff2png_2_DataInputs	xmlsplitter

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Outputs (2)

Name	Description
outAccum
outAccumNull

Datalinks (18)

Source	Sink
ExecuteProcess_r.watershed_DataInputs:output	ExecuteProcess_r.watershed:DataInputs
SRTM:value	ExecuteProcess_r.watershed_DataInputs:elevation
threshold_value_100:value	ExecuteProcess_r.watershed_DataInputs:threshold
ExecuteProcess_r.watershed:ProcessOutputs	ExecuteProcess_r.watershed_ProcessOutputs:input
ExecuteProcess_r.math_DataInputs:output	ExecuteProcess_r.math:DataInputs
math_gt_10:value	ExecuteProcess_r.math_DataInputs:math
ExecuteProcess_r.watershed_ProcessOutputs:accumulationResult	ExecuteProcess_r.math_DataInputs:a
ExecuteProcess_r.math:ProcessOutputs	ExecuteProcess_r.math_ProcessOutputs:input
ExecuteProcess_geotiff2png_ProcessOutputs:outputResult	Decode_Base_64_to_byte_Array_2:base64
ExecuteProcess_geotiff2png_DataInputs:output	ExecuteProcess_geotiff2png:DataInputs
ExecuteProcess_r.math_ProcessOutputs:outputResult	ExecuteProcess_geotiff2png_DataInputs:input
ExecuteProcess_geotiff2png:ProcessOutputs	ExecuteProcess_geotiff2png_ProcessOutputs:input
ExecuteProcess_geotiff2png_2_DataInputs:output	ExecuteProcess_geotiff2png_2:DataInputs
ExecuteProcess_geotiff2png_2:ProcessOutputs	ExecuteProcess_geotiff2png_2_ProcessOutputs:input
ExecuteProcess_geotiff2png_2_ProcessOutputs:outputResult	Decode_Base_64_to_byte_Array:base64
ExecuteProcess_r.watershed_ProcessOutputs:accumulationResult	ExecuteProcess_geotiff2png_2_DataInputs:input
Decode_Base_64_to_byte_Array:bytes	outAccum
Decode_Base_64_to_byte_Array_2:bytes	outAccumNull

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Information Workflow Type

Taverna 2

Information Uploader

Jorgejesus

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Information Version 2 (latest) (of 2)

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Jorgejesus

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PyWPS

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Information Favourited By (2)

Information Statistics

2536 viewings

1514 downloads

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Version History

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GRASS-GIS orchestration using pyWPS

Created by Jorgejesus on Monday 18 April 2011 09:50:43 (UTC)
GRASS-GIS orchestration using pyWPS

Created by Jorgejesus on Monday 25 April 2011 15:19:26 (UTC)

Last edited by Jorgejesus on Monday 25 April 2011 15:21:35 (UTC)

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r.los generates a raster output map in which the cells that are visible from a user-specified observer position are marked with the vertical angle (in degrees) required to see those cells (viewshed). A value of 0 is directly below the specified viewing position, 90 is due horizontal, and 180 is directly above the observer. The angle to the cell containing the viewing position is undefined and set to 180. http://grass.fbk.eu/grass62/manuals/html62_user/r.los.html

Created: 2011-10-13

Credits: Jorgejesus

GRASS-GIS orchestration using pyWPS

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