source: anuga_work/production/australia_ph2/lockhart_river/export_results_max.py @ 6856

"""
Generates ascii grids of nominated areas -
Input: sww file from run_perth.py
       boundaries for grids from project.py
Outputs: ascii grids of specified variables
Stored in the 'outputs_dir' folder for respective .sww file

Note:
If producing a grid for the enitre extent cellsize should be greater than 30m
If producing grids for inundation area resolution should be greater than mesh (ie ~22m)
"""

import project, os
import sys
from os.path import join
from anuga.lib.maxasc.maxasc import MaxAsc
from anuga.shallow_water.data_manager import convert_dem_from_ascii2netcdf, dem2pts
from anuga.shallow_water.data_manager import sww2dem
from os import sep


directory = project.output_folder

time_dir1 = '20090408_142152_run_final_0_51316_1994_Tb__mhingee'
time_dir2 = '20090408_152731_run_final_0_51316_1994_Tb__mhingee'
time_dir3 = '20090408_200614_run_final_0_62786_1994_Tb__mhingee'

time_dirs = [time_dir1, time_dir2, time_dir3]

cellsize = 250
##cellsize = 5

timestep = None    # None means no timestep!
#timestep = 0

######
# Set the special areas of interest.  If none, do: area='All'
######

#area = ['Bunbury', 'Busselton']  # strings must match keys in var_equations below
area = ['All']      # 'All' means no special areas - the whole thing

######
# Define allowed variable names and associated equations to generate values.
# This would not normally change.
######
var_equations = {'stage':     'stage',
                 'momentum':  '(xmomentum**2 + ymomentum**2)**0.5',
                 'depth':     'stage-elevation',
                 'speed':     '(xmomentum**2 + ymomentum**2)**0.5/(stage-elevation+1.e-6)',
                 'elevation': 'elevation' }

# one or more key strings from var_equations above
var = ['stage']

######
# Start running the various conversions we require.
######

for which_var in var:
    if which_var not in var_equations:
        print 'Unrecognized variable name: %s' % which_var
        break

    for which_area in area:
        if which_area == 'All':
            easting_min = None
            easting_max = None
            northing_min = None
            northing_max = None
        else:
            try:
                easting_min = eval('project.xmin%s' % which_area)
                easting_max = eval('project.xmax%s' % which_area)
                northing_min = eval('project.ymin%s' % which_area)
                northing_max = eval('project.ymax%s' % which_area)
            except AttributeError:
                print 'Unrecognized area name: %s' % which_area
                break

        for time_dir in time_dirs:

            name = join(directory, time_dir, project.scenario_name)

            outname = name + '_' + which_area + '_' + which_var
            quantityname = var_equations[which_var]

            print 'start sww2dem: time_dir=%s' % time_dir
            
            sww2dem(name, basename_out = outname,
                        quantity = quantityname,
                        timestep = timestep,
                        cellsize = cellsize,      
                        easting_min = easting_min,
                        easting_max = easting_max,
                        northing_min = northing_min,
                        northing_max = northing_max,        
                        reduction = max, 
                        verbose = True,
                        format = 'asc')