source: TI02-CSML/trunk/csml/API/ops_GridSeriesFeature.py @ 2587

Subversion URL: http://proj.badc.rl.ac.uk/svn/ndg/TI02-CSML/trunk/csml/API/ops_GridSeriesFeature.py@2587
Revision 2587, 14.4 KB checked in by domlowe, 13 years ago (diff)

fixed bug where nearest neighbour search conflicted with longitude transformation

Line 
1''' ops_GridSeriesFeature  contains operations for GridSeriesFeatures'''
2
3import csml.parser
4import csml.csmllibs.csmltime
5import csml.csmllibs.csmldocument
6import csml.API.ops_AbstractFeature
7import csml.API.genSubset
8import csml.csmllibs.netCDFWriter
9import csml.csmllibs.csmlcrs
10import csmlutils
11
12
13import sys  #remove later
14
15def testmethod(self):
16    #print 'testmethod for gridseries feature'
17    return 'testmethod - gridseries'
18
19def getAllowedSubsettings(self):
20    return ['subsetToGridSeries', 'subsetToProfileSeries']  #other operations
21
22def getSliceIndices(self, selection):
23    ''' Calculates indices to use in slicing (eg for RawFileExtracts) and adds them to the selection dictionary
24    '''
25    selLower=[]
26    selUpper=[]
27     
28    #create artificial range for single selections so that (60) becomes (60,60)
29    for sel in selection:
30        if type(selection[sel]) in [int,float]:  #ie. single value as opposed to a list containing a range
31            tmp=selection[sel]
32            selection[sel]=[tmp,tmp] 
33       
34    for sel in selection:
35        for item in enumerate(self.domain[sel]):
36            index=item[0]
37            value=item[1]   
38            if value==selection[sel][0]:
39                #selLower.append(self.domain[sel].index(item))
40                limit1=index
41                #selLower.append(item[0])
42            if value==selection[sel][1]:
43                #selUpper.append(self.domain[sel].index(item))
44                limit2=index
45               
46        #make sure the lower limit is the smaller of the two selection criteria       
47        if limit1 <= limit2:
48            selLower.append(limit1)
49            selUpper.append(limit2+1)#plus 1 to take account of the fact that Numeric (and python) slicing returns only 6 values for [0:6] so, to get the first 7 values say you need to pass [0:7]
50        else:
51            selLower.append(limit2)
52            selUpper.append(limit1 +1)
53   
54    selection['lower']=tuple(selLower)
55    selection['upper']=tuple(selUpper) 
56    return selection
57
58
59def getDomain(self):
60    #returns domain as a dictionary of ordinates {name: [values], ...}
61    self.domain={}
62    self.gridnames={}
63    for gridOrd in self.value.gridSeriesDomain.coordTransformTable.gridOrdinates:
64        name=gridOrd.coordAxisLabel.CONTENT
65        self.gridnames[gridOrd.gridAxesSpanned.CONTENT]=name
66        if hasattr(gridOrd.coordAxisValues, 'insertedExtract'):
67            self.domain[name], fill, axisorder, units=gridOrd.coordAxisValues.insertedExtract.getData()
68        else:           
69            valList=[]
70            try:
71                vals=gridOrd.coordAxisValues.coordinateList.CONTENT
72                for val in vals.split(): 
73                    valList.append(eval(val))
74            except:
75                vals=gridOrd.coordAxisValues.timePositionList.CONTENT
76                for val in vals.split(): 
77                    valList.append(val)           
78            self.domain[name]=valList   
79    return self.domain
80
81def getUom(self):
82    uom=None
83    #returns the uom of the phenomenon.
84    try: 
85        uom=self.value.rangeSet.valueArray.valueComponent.quantityList.insertedExtract.uom.CONTENT
86    except AttributeError:
87        uom =None
88    return uom
89   
90def getDomainUnits(self):
91    srsname=self.value.gridSeriesDomain.srsName
92    cat=csml.csmllibs.csmlcrs.CRSCatalogue()
93    crs=cat.getCRS(srsname)
94    return crs.units
95   
96def __getAxis(self, name):
97    '''called by getLongitudeAxis, getTimeAxis and getLatitudeAxis'''   
98    srsname=self.value.gridSeriesDomain.srsName
99    cat=csml.csmllibs.csmlcrs.CRSCatalogue()
100    crs=cat.getCRS(srsname)     
101    axID=None
102    if name == 'lon':
103        axID = crs.lonAxis
104    elif name == 'lat':
105        axID = crs.latAxis
106    elif name == 'time':
107        axID = crs.timeAxis     
108    if axID is not None:
109        return crs.getAxisLabels()[axID]
110    else:
111        return None
112   
113def getLongitudeAxis(self):
114    return self.__getAxis('lon')
115
116def getLatitudeAxis(self):
117    return self.__getAxis('lat')
118
119def getTimeAxis(self):
120    return self.__getAxis('time')
121
122
123def _subsetGrid(self, **kwargs):
124    '''this takes a selection from a gridseries object (be it a profile, a grid, whatever, it is still just a selection'''
125           
126    #set self.domain:
127    self.getDomain()     
128   
129    #get the CRS from a  the  catalogue
130    cat=csml.csmllibs.csmlcrs.CRSCatalogue()
131    crs=cat.getCRS(self.value.gridSeriesDomain.srsName, self.value.gridSeriesDomain.axisLabels) 
132   
133    #non-feature specific setup code, mainly handles the time dimension/calendar
134   
135    pathToSubsetNetCDF, kwargs, timeAxis, timeName, caltype, times=csml.API.genSubset.genericSubset(self, self.outputdir, self.ncname, self.domain, kwargs)
136     
137    ##Get names of variables in file and relate them to the subset selection
138    selection={}
139    frame=''
140    for gridOrd in self.value.gridSeriesDomain.coordTransformTable.gridOrdinates:
141        try:
142            selection[gridOrd.gridAxesSpanned.CONTENT]=kwargs[gridOrd.coordAxisLabel.CONTENT]
143        except KeyError:
144            allValues=tuple(self.domain[gridOrd.coordAxisLabel.CONTENT])
145        if hasattr(gridOrd.coordAxisValues, 'timePositionList'):
146            if hasattr(gridOrd.coordAxisValues, 'frame'):
147                frame=gridOrd.coordAxisValues.frame
148
149    try:
150        del selection[timeAxis] #NOTE: Haven't resolved the single CRS issue so cannot subset by time within an individual file for now
151    except KeyError:
152        pass
153   
154    #get slice indices
155    selection=self.getSliceIndices(selection)
156
157           
158    strTimes, axisorder, units, fulldata, fillvalue =csml.API.genSubset.getTheData(self, selection, times, timeName)
159    return pathToSubsetNetCDF, crs, frame, timeName, times, strTimes, caltype, axisorder,units, fulldata, fillvalue, kwargs
160   
161def subsetToGridSeries(self, outputdir=None, ncname='gridseries.nc',**kwargs):
162    #perform the subset (note this included nearest neighbour searching, so may return a different set of kwargs
163    if outputdir is not None:
164        self.outputdir=outputdir
165    elif csml.API.csmlContainer.globalContainer.OUTPUTDIR is not None:
166        self.outputdir=csml.API.csmlContainer.globalContainer.OUTPUTDIR
167    csml.csmllibs.csmlextra.checkDirExists(self.outputdir)
168    self.ncname=ncname
169    pathToSubsetNetCDF, crs, frame, timeName, times, strTimes, caltype, axisorder,units, fulldata, fillvalue, kwargs=self._subsetGrid(**kwargs) 
170    #Okay, got the data now. Need to write CSML feature and NetCDF files.
171    #Writing out the CSML feature
172   
173    # define domain/coverage  to use in 'value' attribute   
174    newdomain=csml.parser.GridSeriesDomain()
175    domainSubset, totalArraySize=csml.API.genSubset.subsetDomain(timeName,strTimes,self.domain, **kwargs)
176    cTT=csml.API.genSubset.getCoordTransformTable(domainSubset, crs, frame)
177    newdomain.id=csml.csmllibs.csmlextra.getRandomID()
178    newdomain.coordTransformTable=cTT
179    newdomain.srsName=self.value.gridSeriesDomain.srsName 
180    newdomain.axisLabels=self.value.gridSeriesDomain.axisLabels
181    newdomain.srsDimension=self.value.gridSeriesDomain.srsDimension
182    newdomain.dimension=self.value.gridSeriesDomain.dimension
183    env=csml.parser.GridEnvelope()
184    env.low=csml.parser.csString('0 0 0') #TODO
185    env.high=csml.parser.csString('0 0 0')
186    newdomain.limits=env
187    newdomain.aLabels=self.value.gridSeriesDomain.aLabels
188    rs=csml.parser.RangeSet()
189    sdid=csml.csmllibs.csmlextra.getRandomID()
190    descriptor=csml.parser.NetCDFExtract(id=sdid,fileName=csml.parser.csString(self.ncname),variableName=self.name,arraySize=csml.parser.csString(totalArraySize))
191    rs=csml.parser.RangeSet()
192    va=csml.parser.ValueArray()
193    vc=csml.parser.MeasureOrNullList()
194    vc.href='#%s'%sdid
195    vc.arcrole="http://ndg.nerc.ac.uk/xlinkUsage/insert#QuantityList"
196    vc.role="http://ndg.nerc.ac.uk/fileFormat/csmlStorageDescriptor"
197    vc.show='embed'
198    try:
199        vc.uom=self.value.rangeSet.valueArray.valueComponent.uom
200    except:
201        vc.uom = 'unknown'  #TODO,
202    va.valueComponent=vc
203    va.id=csml.csmllibs.csmlextra.getRandomID()
204    rs.valueArray=va
205    #gridseries coverage
206    cvg=csml.parser.GridSeriesCoverage()
207    cvg.id=csml.csmllibs.csmlextra.getRandomID()
208    cvg.rangeSet=rs
209    cvg.gridSeriesDomain=newdomain   
210   
211    #parameter, as before subsetting.
212    param = self.parameter
213       
214    #create a stand alone gridseries feature containing this coverage
215    csmlWrap=csml.csmllibs.csmlfeaturewrap.CSMLWrapper()
216    subsettedFeature=csmlWrap.createGridSeriesFeature(value=cvg,parameter=param,featureID=csml.csmllibs.csmlextra.getRandomID(),name=self.name,description=self.description)
217 
218    ### write netcdf using NCWriter class (wraps cdms) ###
219    nc=csml.csmllibs.netCDFWriter.NCwriter(pathToSubsetNetCDF)
220    ords=cTT.gridOrdinates
221    axislist=[]
222    for a in axisorder:
223        axislist.append(self.gridnames[a])
224    nc.genWriteVar(self.name.CONTENT,ords, times, caltype, axislist, units, fulldata, fillvalue)
225    nc.closeFinishedFile()
226    print 'NetCDF file written to %s'%pathToSubsetNetCDF
227    return subsettedFeature, pathToSubsetNetCDF, descriptor
228   
229
230def subsetToProfileSeries(self, outputdir=None, ncname='profileseries.nc',**kwargs):
231    #TODO   !!!!!!!!! Need to perform some sort of testing on the kwargs to check it is a profileseries request.
232    if outputdir is not None:
233        self.outputdir=outputdir
234    elif csml.API.csmlContainer.globalContainer.OUTPUTDIR is not None:
235        self.outputdir=csml.API.csmlContainer.globalContainer.OUTPUTDIR
236    csml.csmllibs.csmlextra.checkDirExists(self.outputdir)
237    self.ncname=ncname   
238   
239    #perform the subset (note this included nearest neighbour searching, so may return a different set of kwargs
240    pathToSubsetNetCDF, crs,frame, timeName, times, strTimes, caltype, axisorder,units, fulldata, fillvalue, kwargs=self._subsetGrid(**kwargs) 
241    latName=crs.axes[crs.latAxis]
242    lonName=crs.axes[crs.lonAxis]
243    #Okay, got the data now. Need to write CSML feature and NetCDF files.
244    #Writing out the CSML feature
245   
246    # define domain/coverage  to use in 'value' attribute   
247    newdomain=csml.parser.ProfileSeriesDomain()
248   
249   
250    domainSubset, totalArraySize=csml.API.genSubset.subsetDomain(timeName,strTimes,self.domain, **kwargs)
251    cTT=csml.API.genSubset.getCoordTransformTable(domainSubset, crs, frame) 
252   
253    #Need to remove location (lat/lon) axes from the cTT
254    newGridOrds=[]
255    for gridOrd in cTT.gridOrdinates:
256        if gridOrd.coordAxisLabel.CONTENT not in  [latName,lonName]:
257            newGridOrds.append(gridOrd)
258    cTT.gridOrdinates=newGridOrds
259    axes=[]
260    for ord in newGridOrds:
261        axes.append(ord.coordAxisLabel.CONTENT)
262    cat = csml.csmllibs.csmlcrs.CRSCatalogue()
263    crsInfo=cat.determineCRS(knownCRSAxes=axes)   
264    crs=cat.getCRS(crsInfo[0].srsName, labels=axes)
265   
266    newdomain.coordTransformTable=cTT   
267    newdomain.id=csml.csmllibs.csmlextra.getRandomID()
268    #TODO need to remove 'location' from this srs
269    newdomain.srsName=crsInfo[0].srsName
270    axisLabels=csml.csmllibs.csmlextra.stringify(crsInfo[1].keys())
271    newdomain.axisLabels=axisLabels
272    newdomain.srsDimension=2
273    newdomain.dimension=2
274    env=csml.parser.GridEnvelope()
275    env.low=csml.parser.csString('0 0 0') #TODO
276    env.high=csml.parser.csString('0 0 0')
277    newdomain.limits=env
278    newdomain.aLabels=self.value.gridSeriesDomain.aLabels #todo 
279    rangeSet=csml.parser.RangeSet()
280    descid=csml.csmllibs.csmlextra.getRandomID()
281    descriptor=csml.parser.NetCDFExtract(id=descid,fileName=csml.parser.csString(ncname),variableName=self.name,arraySize=csml.parser.csString(totalArraySize))
282    rs=csml.parser.RangeSet()
283    va=csml.parser.ValueArray()
284    vc=csml.parser.MeasureOrNullList()
285    vc.href='#%s'%descid
286    vc.arcrole="http://ndg.nerc.ac.uk/xlinkUsage/insert#QuantityList"
287    vc.role="http://ndg.nerc.ac.uk/fileFormat/csmlStorageDescriptor"
288    vc.show='embed'
289    vc.insertedExtract=descriptor
290    try:
291        vc.uom=self.value.rangeSet.valueArray.valueComponent.uom
292    except:
293        vc.uom = 'unknown'  #TODO,
294   
295    va.valueComponent=vc
296    va.id=csml.csmllibs.csmlextra.getRandomID()
297    rs.valueArray=va
298    #profileseries coverage
299    cvg=csml.parser.ProfileSeriesCoverage()
300    cvg.id=csml.csmllibs.csmlextra.getRandomID()
301    cvg.rangeSet=rs
302    cvg.profileSeriesDomain=newdomain   
303    csmlWrap=csml.csmllibs.csmlfeaturewrap.CSMLWrapper()
304   
305    #parameter, as before subsetting.
306    param = self.parameter
307   
308    #create 'location' attribute:
309    if (latName, lonName) is not (None, None):
310        locStr ='%s %s'%(kwargs[latName], kwargs[lonName])
311        loc=csml.parser.csString(locStr)
312    else:
313        loc = csml.parser.csString('unknown location')
314       
315   
316    #create a stand alone gridseries feature containing this coverage
317    subsettedFeature=csmlWrap.createProfileSeriesFeature(value=cvg,parameter=param, location=loc, featureID=csml.csmllibs.csmlextra.getRandomID(),name=self.name,description=self.description)
318 
319   
320    ### write netcdf using NCWriter class (wraps cdms) ###
321    nc=csml.csmllibs.netCDFWriter.NCwriter(pathToSubsetNetCDF)
322    ords=cTT.gridOrdinates
323    axislist=[]
324       
325    for a in axisorder:
326        axislist.append(self.gridnames[a])
327
328    nc.genWriteVar(self.name.CONTENT,ords, times, caltype, axislist, units, fulldata, fillvalue, latitude=kwargs[latName], longitude=kwargs[lonName])
329    nc.closeFinishedFile()
330   
331    return subsettedFeature, pathToSubsetNetCDF, descriptor
332
333def subsetToProfile(self, outputdir = None, ncname='profile.nc',**kwargs):
334    #Two step process - subset GridSeries to ProfileSeries, then ProfileSeries to Profile
335    profileSeries, pSfile=self.subsetToProfileSeries(outputdir, ncname, **kwargs)   
336    del kwargs['latitude']    #TODO - need to remove excess kwargs based on the domain of the temporary profileSeries feature
337    del kwargs['longitude']
338    subsettedFeature, pathToSubsetNetCDF=profileSeries.subsetToProfile(ouputdir,ncname, **kwargs)   
339    return subsettedFeature, pathToSubsetNetCDF
340
341def subsetToPointSeries(self, outputdir =None, ncname='pointseries.nc',**kwargs):
342    #Two step process - subset GridSeries to ProfileSeries, then ProfileSeries to PointSeries
343    profileSeries, pSfile=self.subsetToProfileSeries(outputdir, ncname, **kwargs)   
344    del kwargs['latitude']    #TODO - need to remove excess kwargs based on the domain of the temporary profileSeries feature
345    del kwargs['longitude']
346    subsettedFeature, pathToSubsetNetCDF=profileSeries.subsetToPointSeries(outputdir, ncname, **kwargs)   
347    return subsettedFeature, pathToSubsetNetCDF
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