source: anuga_work/development/momentum_sink/scripts/process_gauges.py @ 6971

"""Read in sww file, interpolate at specified locations and plot time series
Additionally, store augmented building database with max inundation depths
"""

import project
from anuga.pyvolution.util import file_function
from anuga.pyvolution.coordinate_transforms.redfearn import degminsec2decimal_degrees, redfearn
from pylab import *


plot = False
    
swwfile = project.outputname + '.sww'

def get_gauges_from_file(filename):
    fid = open(filename)
    lines = fid.readlines()
    fid.close()

    gauges = []
    gaugelocation = []
    for line in lines[1:]:
        fields = line.split(',')
        location = fields[0]
        easting = float(fields[1])
        northing = float(fields[2])
     
        gauges.append([easting, northing])
        gaugelocation.append(location)

    #Return gauges and raw data for subsequent storage    
    return gauges, lines, gaugelocation

gauges, lines, locations = get_gauges_from_file(project.gauge_filename)


#Read model output
quantities = ['stage', 'elevation', 'xmomentum', 'ymomentum']
f = file_function(swwfile,
                  quantities = quantities,
                  interpolation_points = gauges,
                  verbose = True,
                  use_cache = True)


lines[0] = lines[0].strip() +\
               ',MAX INUNDATION DEPTH (m)' +\
               ',MAX MOMENTUM (m^2/s)\n'            
               
from math import sqrt
N = len(gauges)
for k, g in enumerate(gauges):
    if k%((N+10)/10)==0:
        print 'Doing row %d of %d' %(k, N)

    model_time = []
    stages = []
    elevations = []
    momenta = []

    max_depth = 0
    max_momentum = 0    
    for i, t in enumerate(f.T):
        w = f(t, point_id = k)[0]
        z = f(t, point_id = k)[1]
        uh = f(t, point_id = k)[2]
        vh = f(t, point_id = k)[3]        

        m = sqrt(uh*uh + vh*vh)   #Absolute momentum
        
        model_time.append(t)        
        stages.append(w)
        elevations.append(z)  #Should be constant over time
        momenta.append(m) 

        if w-z > max_depth:
            max_depth = w-z
        if m > max_momentum:            
            max_momentum = m    

    #Augment building data
    lines[k+1] = lines[k+1].strip() +\
                     ',%f' %max_depth +\
                     ',%f\n' %max_momentum
    
    print lines[k]
    
#Store new building file with mak depths added

#FN = 'inundation_augmented_' + project.gauge_filename
FN = project.gauge_outname
fid = open(FN, 'w')
for line in lines:
    fid.write(line)
fid.close()