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union_neighbour.py
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union_neighbour.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
/***************************************************************************
Name : Union neighbour
Description : Union neighbour polygon
Arguments : Shapefiles
-------------------
begin : 2015-12-14
copyright : (C) 2015 by Luiz Motta
email : motta dot luiz at gmail.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
"""
#ogr2ogr -overwrite example01_neighbour.shp example01_neighbour.geojson
import os, sys
import argparse
import datetime
try:
from osgeo import ogr
from osgeo import osr
except ImportError:
import ogr
import osr
def run(name_file, year, quiet_status):
def printStatus(status, newLine=False):
if not newLine and quiet_status:
return
if newLine:
ch = "\n"
else:
ch = ""
sys.stdout.write( "\r%s" % ( status.ljust(100) + ch ) )
sys.stdout.flush()
def getLayer(name_file):
inDataSource = driver.Open( name_file, 0 )
#
if inDataSource is None:
printStatus( "File '%s' can't open" % name_file, True )
return None
#
inLayer = inDataSource.GetLayer()
#
return ( inDataSource, inLayer)
def getFeatures(layer):
feats = []
feat = layer.GetNextFeature()
while feat:
geomf = feat.GetGeometryRef()
feats.append( { 'attributes': feat.items(), 'geom': geomf.Clone(), 'fid': feat.GetFID() } )
feat.Destroy()
feat = layer.GetNextFeature()
layer.ResetReading()
return feats
def createOutLayer(spatialRef, suffix, fields, geomType):
( path_file, ext ) = os.path.splitext( name_file )
outFile = "%s_%s%s" % ( path_file, suffix, ext )
#
if os.path.exists( outFile ):
driver.DeleteDataSource( outFile )
#
outDataSource = driver.CreateDataSource( outFile )
#
if outDataSource is None:
printStatus( "File '%s' not be created" % outFile, True )
return None
#
outLayer = outDataSource.CreateLayer( outFile, srs=spatialRef, geom_type=geomType )
#
if outLayer is None:
printStatus( "File '%s' not be created" % outFile, True )
return None
#
for item in fields:
f = ogr.FieldDefn( item['name'], item['type'] )
if item.has_key( 'width' ):
f.SetWidth( item[ 'width' ] )
outLayer.CreateField( f )
#
return ( outFile, outDataSource, outLayer )
def addFeaturesOut(f, fid, defnOut):
feat = ogr.Feature( defnOut )
feat.SetGeometry( f['geom'] )
feat.SetFID( f['fid'] )
for item in f['attributes']:
feat.SetField( item[ 'name' ], item[ 'value' ])
outLayer.CreateFeature( feat )
feat.Destroy()
def getCoordTransform7390( layer ):
wkt7390 = 'PROJCS["Brazil / Albers Equal Area Conic (WGS84)",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Albers_Conic_Equal_Area"],PARAMETER["longitude_of_center",-50.0],PARAMETER["standard_parallel_1",10.0],PARAMETER["standard_parallel_2",-40.0],PARAMETER["latitude_of_center",-25.0],UNIT["Meter",1.0]]'
sr7390 = osr.SpatialReference()
sr7390.ImportFromWkt( wkt7390 )
return osr.CreateCoordinateTransformation( layer.GetSpatialRef(), sr7390 )
def processNeighbour(inFeats, layer, year, ct):
def getFeaturesTouchSpatialFilter(layer, geom, fid=None):
layer.SetSpatialFilter( geom )
feats = []
feat = layer.GetNextFeature()
while feat:
if fid is None or feat.GetFID() != fid:
geomf = feat.GetGeometryRef()
if geomf.Touches( geom ):
feats.append( { 'attributes': feat.items(), 'geom': geomf.Clone(), 'fid': feat.GetFID() } )
feat.Destroy()
feat = layer.GetNextFeature()
layer.ResetReading()
return feats
def removeFeaturesInNotTouch(inFeats):
total = len( inFeats )
removed = 0
for item in inFeats:
feats = getFeaturesTouchSpatialFilter( layer, item['geom'], item['fid'] )
if len( feats ) == 0:
item['geom'].Destroy()
item['geom'] = None
removed += 1
printStatus( "Removing features that hasn't neighbors (%d / %d)..." % ( removed, total ) )
return filter( lambda x: not x['geom'] is None, inFeats )
def createOutFeatures(inFeats, ct):
def getValueEvent(inFeat):
day = inFeat['attributes']['day_year']
geom = inFeat['geom'].Clone()
geom.Transform( ct )
area = geom.Area() / 10000.0
geom.Destroy()
return {'day_year': day, 'area_ha': area }
def getInitValues(inFeat, id_group):
outFeat = {}
outFeat['id_group'] = id_group
outFeat['geom'] = inFeat['geom'].Clone()
outFeat['events'] = [ getValueEvent( inFeat ) ]
return outFeat
def addValues(outFeat, inFeat):
geomUnion = outFeat['geom'].Union( inFeat['geom'])
outFeat['geom'].Destroy()
outFeat['geom'] = geomUnion
outFeat['events'].append( getValueEvent( inFeat ) )
def destroyGeommetries(fids, inFeats):
total = len( fids )
i = 0
for item in inFeats:
if item['fid'] in fids:
i += 0
item['geom'].Destroy()
item['geom'] = None
if i == total:
break
def getSumSameDays( events ):
new_events = []
days = map( lambda x: x['day_year'], events )
days = list( set( days ) )
for item1 in days:
f_days = filter( lambda x: x['day_year'] == item1, events )
if len( f_days ) == 1:
total_area_ha = f_days[0]['area_ha']
else:
total_area_ha = 0
for item2 in f_days:
total_area_ha += item2['area_ha']
event = { 'day_year': item1, 'area_ha': total_area_ha }
new_events.append( event )
return new_events
printStatus( "Creating polygon with neighbors..." )
total = len( inFeats )
outFeats = []
id_group = 0
loop = True
while loop:
loop = False
for item in inFeats:
itemGeom = item['geom']
if itemGeom is None:
continue
feats = getFeaturesTouchSpatialFilter( layer, itemGeom, item['fid'] ) # Always has feats!
# Add from Query inFeats
id_group += 1
outFeat = getInitValues( item, id_group )
# FID's for remove inFeats
fids = [ item['fid'] ] + map( lambda x: x['fid'], feats )
for item2 in feats:
addValues( outFeat, item2 )
# Add from Query by outFeat
while True:
outGeom = outFeat['geom']
if outGeom is None:
continue
feats = getFeaturesTouchSpatialFilter( layer, outGeom )
if len( feats ) == 0:
break
fids += map( lambda x: x['fid'], feats )
for item2 in feats:
addValues( outFeat, item2 )
#
outFeats.append( outFeat )
destroyGeommetries( fids, inFeats )
inFeats = filter( lambda x: not x['geom'] is None, inFeats )
current = len( inFeats )
if current > 0:
loop = True
data = ( id_group, total - current, total )
printStatus( "%d groups (%d of %d features)..." % data )
break # NEWs values of inFeats!
# Remove duplicate day_of_year in events, if has only one day remove item
hasDestroy = False
for item in outFeats:
events = getSumSameDays( item['events'])
del item['events']
if len( events ) == 1:
hasDestroy = True
item['geom'].Destroy()
item['geom'] = None
else:
item['events'] = events
if hasDestroy:
outFeats = filter( lambda x: not x['geom'] is None, outFeats )
return ( outFeats, inFeats )
inFeats = removeFeaturesInNotTouch( inFeats )
return createOutFeatures( inFeats, ct )
def getSumEvents(outFeat):
def getDate( day ):
s_jd = "%.04d%.03d" % ( year, day)
return datetime.datetime.strptime( s_jd, '%Y%j' ).strftime("%Y-%m-%d")
events = sorted( outFeat['events'], key=lambda x: x['day_year'] )
num_events = len( events )
day = events[0]['day_year']
date_ini = getDate( day )
date_end = getDate( events[num_events - 1]['day_year'] )
area_ini_ha = events[0]['area_ha']
#
days_events = "%03d" % day
area_end_ha = area_ini_ha
area_events_ha = "%f" % area_ini_ha
for item in events[1:]:
days_events = "%s;%03d" % ( days_events, item['day_year'] )
area_end_ha += item['area_ha']
area_events_ha = "%s;%f" % ( area_events_ha, item['area_ha'] )
#
return {
'num_events': num_events,
'date_ini': date_ini,
'date_end': date_end,
'area_ini_ha': area_ini_ha,
'area_end_ha': area_end_ha,
'days_events': days_events,
'area_events_ha': area_events_ha
}
ogr.RegisterAll()
driver = ogr.GetDriverByName( "ESRI Shapefile" )
if not os.path.exists( name_file ):
printStatus( "File '%s' not exist" % name_file, True )
return 1
# Input
data = getLayer( name_file )
if data is None:
return 1
( inDataSource, inLayer ) = data
printStatus( "Reading features..." )
inFeats = getFeatures( inLayer )
# Output
fields = [
{ 'name': 'id_group', 'type': ogr.OFTInteger },
{ 'name': 'num_events', 'type': ogr.OFTInteger },
{ 'name': 'date_ini', 'type': ogr.OFTString, 'width': 10 },
{ 'name': 'date_end', 'type': ogr.OFTString, 'width': 10 },
{ 'name': 'area_ini_ha', 'type': ogr.OFTReal },
{ 'name': 'area_end_ha', 'type': ogr.OFTReal },
{ 'name': 'days_events', 'type': ogr.OFTString, 'width': 200 },
{ 'name': 'area_events_ha', 'type': ogr.OFTString, 'width': 200 }
]
data = createOutLayer( inLayer.GetSpatialRef(), 'neighbour', fields, ogr.wkbMultiPolygon )
if data is None:
return 1
( outName, outDataSource, outLayer ) = data
defnOut = outLayer.GetLayerDefn()
# Process
data = ( outName, inLayer.GetFeatureCount() )
printStatus( "Processing '%s' (%d features)" % data, True )
( outFeats, inFeats ) = processNeighbour( inFeats, inLayer, year, getCoordTransform7390( inLayer ) )
totalOutFeats = len( outFeats )
# Clean
for item in inFeats:
item['geom'].Destroy()
del inFeats[:]
# Save Features
fid = 0
for item in outFeats:
fid += 1
sumEvent = getSumEvents( item )
f = { 'fid': fid, 'geom': item['geom'],
'attributes': [
{ 'name': 'id_group', 'value': item['id_group'] },
{ 'name': 'num_events', 'value': sumEvent['num_events'] },
{ 'name': 'date_ini', 'value': sumEvent['date_ini'] },
{ 'name': 'date_end', 'value': sumEvent['date_end'] },
{ 'name': 'area_ini_ha', 'value': sumEvent['area_ini_ha'] },
{ 'name': 'area_end_ha', 'value': sumEvent['area_end_ha'] },
{ 'name': 'days_events', 'value': sumEvent['days_events'] },
{ 'name': 'area_events_ha', 'value': sumEvent['area_events_ha'] }
]
}
addFeaturesOut( f, fid, defnOut )
del f['attributes']
item['geom'].Destroy()
del outFeats[:]
inDataSource.Destroy()
outDataSource.Destroy()
printStatus( "Finish! '%s' (%d features)" % ( outName, totalOutFeats ), True )
return 0
def main():
parser = argparse.ArgumentParser(description='Create union neighbour polygon.' )
parser.add_argument( '-q', '--quiet', action="store_false", help='Hides the processing status' )
parser.add_argument( 'shapefile', metavar='shapefile', type=str, help='Name of Shapefile' )
parser.add_argument( 'year', metavar='Year', type=int, help='Year for julian days' )
args = parser.parse_args()
return run( args.shapefile, args.year, not args.quiet )
if __name__ == "__main__":
sys.exit( main() )