source: anuga_work/production/carnarvon/carnarvon_rerun/build_elevation.py @ 6568

"""Build the elevation data to run a tsunami inundation scenario 
for Busselton, WA, Australia.

Input: elevation data from project.py
Output: pts file stored in project.topographies_dir 
The run_model.py is reliant on the output of this script.

"""

#------------------------------------------------------------------------------
# Import necessary modules
#------------------------------------------------------------------------------

# Standard modules
import os
from os.path import join

# Related major packages
from anuga.shallow_water.data_manager import convert_dem_from_ascii2netcdf
from anuga.shallow_water.data_manager import dem2pts
from anuga.shallow_water.data_manager import start_screen_catcher
from anuga.shallow_water.data_manager import copy_code_files
from anuga.geospatial_data.geospatial_data import Geospatial_data
from anuga.utilities.polygon import read_polygon

# Application specific imports
from setup_model import project   # Definition of file names and polygons


#------------------------------------------------------------------------------
# Copy scripts to time stamped output directory and capture screen
# output to file
#------------------------------------------------------------------------------
copy_code_files(project.output_build,__file__, 
                os.path.dirname(project.__file__)+os.sep+\
                project.__name__+'.py' )
start_screen_catcher(project.output_build)


#------------------------------------------------------------------------------
# Preparation of topographic data
#
# Convert ASC 2 DEM 2 PTS using source data and store result in source data
# Do for coarse and fine data
# Fine pts file to be clipped to area of interest
#------------------------------------------------------------------------------

print 'project.bounding_polygon', project.bounding_polygon
print 'project.combined_elevation_basename', project.combined_elevation_basename

# Create Geospatial data from ASCII files
geospatial_data = {}
if not project.ascii_grid_filenames == []:
    for filename in project.ascii_grid_filenames:
        absolute_filename = join(project.topographies_folder, filename)
        convert_dem_from_ascii2netcdf(absolute_filename,
                                      basename_out=absolute_filename,
                                      use_cache=True,
                                      verbose=True)
        dem2pts(absolute_filename, use_cache=True, verbose=True)

        G_grid = Geospatial_data(file_name=absolute_filename+'.pts',
                                                    verbose=True)
        print 'Clip geospatial object'
        geospatial_data[filename] = G_grid.clip(project.bounding_polygon)

# Create Geospatial data from TXT files
if not project.point_filenames == []:
    for filename in project.point_filenames:
        absolute_filename = join(project.topographies_folder, filename)
        G_points = Geospatial_data(file_name=absolute_filename,
                                                    verbose=True)
        print 'Clip geospatial object'
        geospatial_data[filename] = G_points.clip(project.bounding_polygon)

#-------------------------------------------------------------------------------
# Combine, clip and export dataset 
#-------------------------------------------------------------------------------
extent_polygons = []
for extent_polygon_filename in project.extent_polygon_filenames:
    p = read_polygon(join(project.polygons_folder, extent_polygon_filename))
    extent_polygons.append(p)
    
print 'Add geospatial objects' # except', project.offshore_name5
G = None
for key in geospatial_data:
    if key == project.ascii_grid_filenames[1]or key == project.ascii_grid_filenames[2]:
        G += geospatial_data[key]
    elif key == project.ascii_grid_filenames[0] or key == project.point_filenames[0] or key == project.point_filenames[1]:
        D = geospatial_data[key]
        D = D.clip_outside(extent_polygons[0])
        D = D.clip_outside(extent_polygons[1])
        G += D
    
print 'Export combined DEM file'
G.export_points_file(project.combined_elevation + '.pts')
print 'Do txt version too'
# Use for comparision in ARC
G.export_points_file(project.combined_elevation + '.txt')