GetSSURGOFeaturesForBoundingbox Namespace Reference

Query USDA soil datamart for SSURGO MapunitPolyExtended features and the following attributes, computed as a weighted average of the components in each mapunit, for the first soil horizon of each mapunit: ksat (chorizon.ksat_r), pctClay (chorizon.claytotal_r), pctSilt (chorizon.silttotal_r), pctSand (chorizon.andtotal_r), porosity (chorizon.wsatiated_r), 'fieldCap' (chorizon.wthirdbar_r), 'avlWatCap' (plant available water capacity; chorizon.awc_r), and drnWatCont (drainable water capacity; porosity - fieldCap). More...

Variables
tuple	parser = argparse.ArgumentParser(description='Get SSURGO features for a bounding box')
string	help = 'The configuration file'
tuple	args = parser.parse_args()
tuple	cmdline = GenericMetadata.getCommandLine()
	configFile = None
tuple	context = Context(args.projectDir, configFile)
tuple	manifest = GenericMetadata.readManifestEntries(context)
tuple	shpFilepath = os.path.join( context.projectDir, manifest['soil_features'] )
tuple	studyArea = GenericMetadata.readStudyAreaEntries(context)
tuple	bbox = bboxFromString(studyArea['bbox_wgs84'])
list	outputrasterresolutionX = studyArea['dem_res_x']
list	outputrasterresolutionY = studyArea['dem_res_y']
list	srs = studyArea['dem_srs']
tuple	shpFilename
tuple	asset = AssetProvenance(GenericMetadata.MANIFEST_SECTION)

Detailed Description

Query USDA soil datamart for SSURGO MapunitPolyExtended features and the following attributes, computed as a weighted average of the components in each mapunit, for the first soil horizon of each mapunit: ksat (chorizon.ksat_r), pctClay (chorizon.claytotal_r), pctSilt (chorizon.silttotal_r), pctSand (chorizon.andtotal_r), porosity (chorizon.wsatiated_r), 'fieldCap' (chorizon.wthirdbar_r), 'avlWatCap' (plant available water capacity; chorizon.awc_r), and drnWatCont (drainable water capacity; porosity - fieldCap).

Note

For information on SSURGO attributes see: http://soildatamart.nrcs.usda.gov/SSURGOMetadata.aspx

This software is provided free of charge under the New BSD License. Please see the following license information:

Copyright (c) 2013, University of North Carolina at Chapel Hill All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
• Neither the name of the University of North Carolina at Chapel Hill nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Author

Brian Miles brian.nosp@m._mil.nosp@m.es@un.nosp@m.c.ed.nosp@m.u

Pre conditions

1. Configuration file must define the following sections and values: 'GDAL/OGR', 'PATH_OF_OGR2OGR'
2. The following metadata entry(ies) must be present in the study area section of the metadata associated with the project directory: bbox_wgs84 dem_res_x dem_res_y dem_srs

Post conditions

1. Will write the following entry(ies) to the manifest section of metadata associated with the project directory: soil_features [the name of the vector file containing the soil features]

Usage:

GetSSURGOFeaturesForBoundingbox.py -p /path/to/project_dir

Note

EcohydroLib configuration file must be specified by environmental variable 'ECOHYDROWORKFLOW_CFG', or -i option must be specified.

Variable Documentation

tuple GetSSURGOFeaturesForBoundingbox.args = parser.parse_args()

tuple GetSSURGOFeaturesForBoundingbox.asset = AssetProvenance(GenericMetadata.MANIFEST_SECTION)

tuple GetSSURGOFeaturesForBoundingbox.bbox = bboxFromString(studyArea['bbox_wgs84'])

tuple GetSSURGOFeaturesForBoundingbox.cmdline = GenericMetadata.getCommandLine()

GetSSURGOFeaturesForBoundingbox.configFile = None

tuple GetSSURGOFeaturesForBoundingbox.context = Context(args.projectDir, configFile)

string GetSSURGOFeaturesForBoundingbox.help = 'The configuration file'

tuple GetSSURGOFeaturesForBoundingbox.manifest = GenericMetadata.readManifestEntries(context)

list GetSSURGOFeaturesForBoundingbox.outputrasterresolutionX = studyArea['dem_res_x']

list GetSSURGOFeaturesForBoundingbox.outputrasterresolutionY = studyArea['dem_res_y']

tuple GetSSURGOFeaturesForBoundingbox.parser = argparse.ArgumentParser(description='Get SSURGO features for a bounding box')

tuple GetSSURGOFeaturesForBoundingbox.shpFilename

Initial value:

= getMapunitFeaturesForBoundingBox(context.config, context.projectDir, bbox, 
                                               tileBbox=args.tile, t_srs=srs, tileDivisor=args.tiledivisor,
                                               keepOriginals=args.keeporiginals,
                                               overwrite=args.overwrite,
                                               nprocesses=args.nprocesses)

tuple GetSSURGOFeaturesForBoundingbox.shpFilepath = os.path.join( context.projectDir, manifest['soil_features'] )

list GetSSURGOFeaturesForBoundingbox.srs = studyArea['dem_srs']

tuple GetSSURGOFeaturesForBoundingbox.studyArea = GenericMetadata.readStudyAreaEntries(context)