ecohydrolib.ssurgo.rasterize Namespace Reference

Rasterize SSURGO features. More...

Functions
def	deleteSoilRasters (context, manifest)
	Delete soil raster maps stored in a project. More...
def	rasterizeSSURGOFeatures
	Create raster maps, in GeoTIFF format, for SSURGO attributes associated with SSURGO MapunitPoly/MapunitPolyExtended features. More...

Variables
	RASTER_ATTRIBUTES = attributequery.ATTRIBUTE_LIST_NUMERIC

Detailed Description

Rasterize SSURGO features.

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

Function Documentation

def ecohydrolib.ssurgo.rasterize.deleteSoilRasters	(		context,
			manifest
	)

Delete soil raster maps stored in a project.

Parameters

context	Context object containing projectDir, the path of the project whose metadata store is to be read from
manifest	Dict containing manifest entries. Files associted with entries whose key begins with 'soil_raster_' will be deleted

def ecohydrolib.ssurgo.rasterize.rasterizeSSURGOFeatures	(		config,
			outputDir,
			featureFilename,
			featureLayername,
			featureAttrList,
			getResolutionFromRasterFileNamed = None,
			rasterResolutionX = None,
			rasterResolutionY = None
	)

Create raster maps, in GeoTIFF format, for SSURGO attributes associated with SSURGO MapunitPoly/MapunitPolyExtended features.

Note

Will silently exit if rasters already exist.

If getResolutionFromRasterFileNamed as well as rasterResolutionX and rasterResolutionY are specified, output raster resolution will be determined from the file named by getResolutionFromRasterFileNamed.

Parameters

config	onfigParser containing the section 'GDAL/OGR' and option 'PATH_OF_GDAL_RASTERIZE'
outputDir	String representing the absolute/relative path of the directory into which output rasters should be written
featureFilename	String representing the absolute/relative path of the input feature in ESRI shapefile or OGC GML format
featureLayername	String representing the name of feature layer whose features are to be rasterize
featureAttrList	List containing the SSURGO attributes for which raster maps are to be created
getResolutionFromRasterFileNamed	String representing the absolute path of an existing raster file from which the output raster resolution should be determined
rasterResolutionX	Float representing the X resolution of the output rasters
rasterResolutionY	Float representing the Y resolution of the output rasters

Returns

Dictionary containing the keys for each soil attribute and values of the names of the raster files generated for that attribute

Exceptions

ConfigParser.NoSectionError
ConfigParser.NoOptionError
Exception	if featureFilename is neither a SHP nor a GML file
IOError(errno.ENOTDIR)	if outputDir is not a directory
IOError(errno.EACCESS)	if outputDir is not writable
IOError(errno.EACCESS)	if featureFilename is not readable
IOError(errno.ENOENT)	if featureFilename is not a file
IOError(errno.EACCES)	if getResolutionFromRasterFileNamed is not readable
ValueError	if rasterResolutionX or rasterResolutionY are not floating point numbers greater than 0
Exception	if a gdal_rasterize command fails

Variable Documentation

ecohydrolib.ssurgo.rasterize.RASTER_ATTRIBUTES = attributequery.ATTRIBUTE_LIST_NUMERIC