source: branches/branch-1.3/zoo-project/zoo-services/ogr/base-vect-ops-py/cgi-env/ogr_sp.py

Last change on this file was 422, checked in by djay, 11 years ago

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1#
2# Author : Gérald FENOY
3#
4# Copyright 2009-2013 GeoLabs SARL. All rights reserved.
5#
6# Permission is hereby granted, free of charge, to any person obtaining a
7# copy of this software and associated documentation files (the
8# "Software"), to deal in the Software without restriction, including with
9# out limitation the rights to use, copy, modify, merge, publish,
10# distribute, sublicense, and/or sell copies of the Software, and to
11# permit persons to whom the Software is furnished to do so, subject to
12# the following conditions:
13#
14# The above copyright notice and this permission notice shall be included
15# in all copies or substantial portions of the Software.
16#
17# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
21# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24#
25
26from osgeo import *
27import osgeo.ogr
28import osgeo.gdal
29import libxml2
30import os
31import sys
32import zoo
33
34def readFileFromBuffer(data,ext):
35    try:
36        geometry=[]
37        print >> sys.stderr,'/vsimem//temp1'+ext
38        #print >> sys.stderr,data
39        osgeo.gdal.FileFromMemBuffer('/vsimem//temp1'+ext,data)
40        ds = osgeo.ogr.Open('/vsimem//temp1'+ext)
41        lyr = ds.GetLayer(0)
42        feat = lyr.GetNextFeature()
43        while feat is not None:
44            geometry+=[feat.Clone()]
45            feat.Destroy()
46            feat = lyr.GetNextFeature()
47        ds.Destroy()
48        osgeo.gdal.Unlink('/vsimem//temp1'+ext)
49        return geometry
50    except Exception,e:
51        print >> sys.stderr,e
52        return []
53
54def buildFeatureFromGeomtry(conf,geom,driverName,ext):
55    drv = osgeo.ogr.GetDriverByName( driverName )
56    ds = drv.CreateDataSource( "/vsimem//store"+conf["lenv"]["sid"]+"0."+ext )
57    lyr = ds.CreateLayer( "Result", None, osgeo.ogr.wkbUnknown )
58    field_defn = osgeo.ogr.FieldDefn( "Name", osgeo.ogr.OFTString )
59    field_defn.SetWidth( len("Result10000") )
60    lyr.CreateField ( field_defn )
61    feat = osgeo.ogr.Feature(lyr.GetLayerDefn())
62    feat.SetField( "Name", "Input0" )
63    feat.SetGeometry(geom)
64    lyr.CreateFeature(feat)
65    ds.Destroy()
66    return [feat]
67
68def createGeometryFromWFS(conf,my_wfs_response):
69    try:
70        geom=osgeo.ogr.CreateGeometryFromGML(my_wfs_response.replace('<?xml version="1.0" encoding="utf-8"?>\n',''))
71    except:
72        geom=None
73    try:
74        if geom is None:
75            if not(conf["lenv"].has_key("cnt")):
76                conf["lenv"]["cnt"]=0
77            else:
78                conf["lenv"]["cnt"]+=1
79            return readFileFromBuffer(my_wfs_response,str(conf["lenv"]["cnt"]))
80        else:
81            return buildFeatureFromGeomtry(conf,geom,"GML","xml")
82    except:
83        print >> sys.stderr,"Unable to load file input data !!!\n\n\n"
84
85def createLayerFromJson(conf,obj):
86    geom=osgeo.ogr.CreateGeometryFromJson(obj)
87    if geom is None:
88        return readFileFromBuffer(obj,".json")
89    else:
90        return buildFeatureFromGeomtry(conf,geom,"GeoJSON","json")
91
92def extractInputs(conf,obj):
93    if obj["mimeType"]=="application/json":
94        return createLayerFromJson(conf,obj["value"])
95    else:
96        return createGeometryFromWFS(conf,obj["value"])
97   
98def outputResult(conf,obj,geom):
99    driverName = "GML"
100    extension = [ ".xml" , ".xsd" ]
101    if obj["mimeType"]=="application/json":
102        driverName = "GeoJSON"
103        extension = [ ".js" ]
104    if obj.keys().count("schema")>0 and \
105            obj["schema"]=="http://schemas.opengis.net/kml/2.2.0/ogckml22.xsd":
106        driverName = "KML"
107        extension = [ ".kml" ]
108    drv = osgeo.ogr.GetDriverByName( driverName )
109    # Create virtual file
110    ds = drv.CreateDataSource( "/vsimem/store"+conf["lenv"]["sid"]+extension[0] )
111    lyr = ds.CreateLayer( "Result", None, osgeo.ogr.wkbUnknown )
112    i=0
113    while i < len(geom):
114        if i==0 and driverName!="GeoJSON":
115            poDstFDefn=geom[i].GetDefnRef()
116            if poDstFDefn is not None:
117                nDstFieldCount = poDstFDefn.GetFieldCount()
118                for iField in range(nDstFieldCount):
119                    poSrcFieldDefn = poDstFDefn.GetFieldDefn(iField)
120                    oFieldDefn = osgeo.ogr.FieldDefn(poSrcFieldDefn.GetNameRef(),poSrcFieldDefn.GetType())
121                    oFieldDefn.SetWidth( poSrcFieldDefn.GetWidth() )
122                    oFieldDefn.SetPrecision( poSrcFieldDefn.GetPrecision() )
123                    lyr.CreateField( oFieldDefn )
124        lyr.CreateFeature(geom[i])
125        geom[i].Destroy()
126        i+=1
127    ds.Destroy()
128    vsiFile=osgeo.gdal.VSIFOpenL("/vsimem/store"+conf["lenv"]["sid"]+extension[0],"r")
129    i=0
130    while osgeo.gdal.VSIFSeekL(vsiFile,0,os.SEEK_END)>0:
131        i+=1
132    fileSize=osgeo.gdal.VSIFTellL(vsiFile)
133    osgeo.gdal.VSIFSeekL(vsiFile,0,os.SEEK_SET)
134    obj["value"]=osgeo.gdal.VSIFReadL(fileSize,1,vsiFile)
135    osgeo.gdal.Unlink("/vsimem/store"+conf["lenv"]["sid"]+extension[0])
136
137def BufferPy(conf,inputs,outputs):
138    print >> sys.stderr, "Starting service ..."
139    try:
140        bdist=float(inputs["BufferDistance"]["value"])
141    except:
142        bdist=1
143    print >> sys.stderr, bdist
144    geometry=extractInputs(conf,inputs["InputPolygon"])
145    i=0
146    rgeometries=[]
147    while i < len(geometry):
148        tmp=geometry[i].Clone()
149        resg=geometry[i].GetGeometryRef().Buffer(bdist)
150        tmp.SetGeometryDirectly(resg)
151        rgeometries+=[tmp]
152        geometry[i].Destroy()
153        resg.thisown=False 
154        tmp.thisown=False
155        i+=1
156    outputResult(conf,outputs["Result"],rgeometries)
157    i=0
158    return zoo.SERVICE_SUCCEEDED
159
160def BoundaryPy(conf,inputs,outputs):
161    geometry=extractInputs(conf,inputs["InputPolygon"])
162    i=0
163    rgeometries=[]
164    while i < len(geometry):
165        tmp=geometry[i].Clone()
166        resg=geometry[i].GetGeometryRef()
167        resg=resg.GetBoundary()
168        tmp.SetGeometryDirectly(resg)
169        rgeometries+=[tmp]
170        geometry[i].Destroy()
171        i+=1
172    outputResult(conf,outputs["Result"],rgeometries)
173    return zoo.SERVICE_SUCCEEDED
174
175def CentroidPy(conf,inputs,outputs):
176    geometry=extractInputs(conf,inputs["InputPolygon"])
177    i=0
178    rgeometries=[]
179    while i < len(geometry):
180        tmp=geometry[i].Clone()
181        resg=geometry[i].GetGeometryRef()
182        if resg.GetGeometryType()!=3:
183            resg=resg.ConvexHull()
184        resg=resg.Centroid()
185        tmp.SetGeometryDirectly(resg)
186        rgeometries+=[tmp]
187        geometry[i].Destroy()
188        i+=1
189    outputResult(conf,outputs["Result"],rgeometries)
190    return zoo.SERVICE_SUCCEEDED
191
192def ConvexHullPy(conf,inputs,outputs):
193    geometry=extractInputs(conf,inputs["InputPolygon"])
194    i=0
195    rgeometries=[]
196    while i < len(geometry):
197        tmp=geometry[i].Clone()
198        resg=geometry[i].GetGeometryRef().ConvexHull()
199        tmp.SetGeometryDirectly(resg)
200        rgeometries+=[tmp]
201        geometry[i].Destroy()
202        i+=1
203    outputResult(conf,outputs["Result"],rgeometries)
204    return zoo.SERVICE_SUCCEEDED
205
206
207
208def EnvelopePy(conf,inputs,outputs):
209    print >> sys.stderr, inputs
210    try:
211        bdist=float(inputs["BufferDistance"]["value"])
212    except:
213        bdist=10
214    geometry=extractInputs(conf,inputs["InputPolygon"])
215    tmp=geometry[0].GetGeometryRef().GetEnvelope()
216    outputs["Result"]["value"]=str(tmp[0])+','+str(tmp[2])+','+str(tmp[1])+','+str(tmp[3])+','+'urn:ogc:def:crs:OGC:1.3:CRS84'
217    print >> sys.stderr,outputs["Result"]
218    return 3
219
220def UnionPy(conf,inputs,outputs):
221    geometry1=extractInputs(conf,inputs["InputEntity1"])
222    geometry2=extractInputs(conf,inputs["InputEntity2"])
223    rgeometries=[]
224    i=0
225    while i < len(geometry1):
226        j=0
227        while j < len(geometry2):
228            tmp=geometry1[i].Clone()
229            resg=geometry2[j].GetGeometryRef()
230            resg=resg.Union(geometry1[i].GetGeometryRef())
231            tmp.SetGeometryDirectly(resg)
232            if not(resg.IsEmpty()):
233                rgeometries+=[tmp]
234            j+=1
235        geometry1[i].Destroy()
236        i+=1
237    i=0
238    while i < len(geometry2):
239        geometry2[i].Destroy()
240        i+=1
241    outputResult(conf,outputs["Result"],rgeometries)
242    return 3
243
244def IntersectionPy(conf,inputs,outputs):
245
246    geometry1=extractInputs(conf,inputs["InputEntity1"])
247    geometry2=extractInputs(conf,inputs["InputEntity2"])
248
249    print >> sys.stderr,str(len(geometry1))+" "+str(len(geometry2))
250
251    rgeometries=[]
252    fids=[]
253    i=0
254    while i < len(geometry1):
255        j=0
256        while j < len(geometry2):
257            tmp=geometry2[j].Clone()
258            resg=geometry2[j].GetGeometryRef()
259            #resg=resg.Intersection(geometry1[i].GetGeometryRef())
260            resg=geometry1[i].GetGeometryRef().Intersection(resg)
261            tmp.SetGeometryDirectly(resg)
262            if resg is not None and not(resg.IsEmpty()) and fids.count(tmp.GetFID())==0:
263                rgeometries+=[tmp]
264                fids+=[tmp.GetFID()]
265            else:
266                tmp.Destroy()
267            j+=1
268        geometry1[i].Destroy()
269        i+=1
270    i=0
271    while i < len(geometry2):
272        geometry2[i].Destroy()
273        i+=1
274    outputResult(conf,outputs["Result"],rgeometries)
275    print >> sys.stderr,"/outputResult"
276    return 3
277
278def DifferencePy(conf,inputs,outputs):
279    geometry1=extractInputs(conf,inputs["InputEntity1"])
280    geometry2=extractInputs(conf,inputs["InputEntity2"])
281    rgeometries=[]
282    i=0
283    while i < len(geometry1):
284        j=0
285        while j < len(geometry2):
286            tmp=geometry2[j].Clone()
287            resg=geometry1[i].GetGeometryRef()
288            resg=resg.Difference(geometry2[i].GetGeometryRef())
289            tmp.SetGeometryDirectly(resg)
290            if not(resg.IsEmpty()):
291                rgeometries+=[tmp]
292            j+=1
293        geometry1[i].Destroy()
294        i+=1
295    i=0
296    while i < len(geometry2):
297        geometry2[i].Destroy()
298        i+=1
299    outputResult(conf,outputs["Result"],rgeometries)
300    return 3
301
302def SymDifferencePy(conf,inputs,outputs):
303    geometry1=extractInputs(conf,inputs["InputEntity1"])
304    geometry2=extractInputs(conf,inputs["InputEntity2"])
305    rgeometries=[]
306    i=0
307    while i < len(geometry1):
308        j=0
309        while j < len(geometry2):
310            tmp=geometry2[j].Clone()
311            resg=geometry1[i].GetGeometryRef()
312            resg=resg.SymmetricDifference(geometry2[i].GetGeometryRef())
313            tmp.SetGeometryDirectly(resg)
314            rgeometries+=[tmp]
315            j+=1
316        geometry1[i].Destroy()
317        i+=1
318    i=0
319    while i < len(geometry2):
320        geometry2[i].Destroy()
321        i+=1
322    outputResult(conf,outputs["Result"],rgeometries)
323    return 3
324
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