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184 lines
5.9 KiB
Python
184 lines
5.9 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ogrinfo.py
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---------------------
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Date : November 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Victor Olaya'
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__date__ = 'November 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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import string
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import re
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try:
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from osgeo import ogr
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ogrAvailable = True
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except:
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ogrAvailable = False
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from PyQt4.QtCore import *
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from PyQt4.QtGui import *
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from qgis.core import *
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from processing.parameters.ParameterVector import ParameterVector
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from processing.outputs.OutputHTML import OutputHTML
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from OgrAlgorithm import OgrAlgorithm
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class OgrInfo(OgrAlgorithm):
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OUTPUT = 'OUTPUT'
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INPUT_LAYER = 'INPUT_LAYER'
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def defineCharacteristics(self):
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self.name = 'Information'
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self.group = '[OGR] Miscellaneous'
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self.addParameter(ParameterVector(self.INPUT_LAYER, 'Input layer',
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[ParameterVector.VECTOR_TYPE_ANY], False))
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self.addOutput(OutputHTML(self.OUTPUT, 'Layer information'))
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def commandLineName(self):
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return "gdalogr:vectorinfo"
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def processAlgorithm(self, progress):
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input = self.getParameterValue(self.INPUT_LAYER)
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ogrLayer = self.ogrConnectionString(input)
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output = self.getOutputValue(self.OUTPUT)
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self.ogrinfo(ogrLayer)
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f = open(output, 'w')
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f.write('<pre>' + self.info + '</pre>')
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f.close()
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def out(self, text):
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self.info = self.info + text + '\n'
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def ogrinfo(self, pszDataSource):
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bVerbose = True
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bSummaryOnly = True
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self.info = ''
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if not ogrAvailable:
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self.info = 'OGR bindings not installed'
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return
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qDebug("Opening data source '%s'" % pszDataSource)
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poDS = ogr.Open(pszDataSource, False)
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if poDS is None:
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self.info = self.failure(pszDataSource)
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return
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poDriver = poDS.GetDriver()
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if bVerbose:
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self.out("INFO: Open of `%s'\n using driver `%s' successful."
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% (pszDataSource, poDriver.GetName()))
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poDS_Name = poDS.GetName()
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if str(type(pszDataSource)) == "<type 'unicode'>" \
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and str(type(poDS_Name)) == "<type 'str'>":
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poDS_Name = unicode(poDS_Name, 'utf8')
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if bVerbose and pszDataSource != poDS_Name:
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self.out("INFO: Internal data source name '%s'\n \
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different from user name '%s'." \
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% (poDS_Name, pszDataSource))
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# --------------------------------------------------------------------
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# Process each data source layer.
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# --------------------------------------------------------------------
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for iLayer in range(poDS.GetLayerCount()):
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poLayer = poDS.GetLayer(iLayer)
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if poLayer is None:
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self.out("FAILURE: Couldn't fetch advertised layer %d!"
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% iLayer)
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return 1
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self.ReportOnLayer(poLayer)
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def ReportOnLayer(
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self,
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poLayer,
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pszWHERE=None,
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poSpatialFilter=None,
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):
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bVerbose = True
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poDefn = poLayer.GetLayerDefn()
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# --------------------------------------------------------------------
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# Set filters if provided.
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# --------------------------------------------------------------------
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if pszWHERE is not None:
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if poLayer.SetAttributeFilter(pszWHERE) != 0:
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self.out('FAILURE: SetAttributeFilter(%s) failed.' % pszWHERE)
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return
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if poSpatialFilter is not None:
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poLayer.SetSpatialFilter(poSpatialFilter)
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# --------------------------------------------------------------------
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# Report various overall information.
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# --------------------------------------------------------------------
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self.out('')
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self.out('Layer name: %s' % poDefn.GetName())
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if bVerbose:
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self.out('Geometry: %s'
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% ogr.GeometryTypeToName(poDefn.GetGeomType()))
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self.out('Feature Count: %d' % poLayer.GetFeatureCount())
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oExt = poLayer.GetExtent(True, can_return_null=True)
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if oExt is not None:
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self.out('Extent: (%f, %f) - (%f, %f)' % (oExt[0], oExt[1],
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oExt[2], oExt[3]))
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if poLayer.GetSpatialRef() is None:
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pszWKT = '(unknown)'
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else:
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pszWKT = poLayer.GetSpatialRef().ExportToPrettyWkt()
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self.out('Layer SRS WKT:\n%s' % pszWKT)
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if len(poLayer.GetFIDColumn()) > 0:
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self.out('FID Column = %s' % poLayer.GetFIDColumn())
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if len(poLayer.GetGeometryColumn()) > 0:
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self.out('Geometry Column = %s' % poLayer.GetGeometryColumn())
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for iAttr in range(poDefn.GetFieldCount()):
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poField = poDefn.GetFieldDefn(iAttr)
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self.out('%s: %s (%d.%d)' % (poField.GetNameRef(),
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poField.GetFieldTypeName(poField.GetType()),
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poField.GetWidth(), poField.GetPrecision()))
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