source: trunk/anuga_core/source/anuga/shallow_water/most2nc.py @ 8124

Last change on this file since 8124 was 8124, checked in by wilsonr, 13 years ago

Made changes described in ticket 359.

File size: 2.7 KB
Line 
1"""This has to do with creating elevation data files for use with ferret2sww.
2It reads a bathymetry ascii file and creates a NetCDF (nc) file similar to
3MOSTs output.
4
5 $Author: Peter Row
6 
7"""
8
9import sys
10from Scientific.IO.NetCDF import NetCDFFile
11from anuga.config import netcdf_mode_r, netcdf_mode_w, netcdf_mode_a
12import anuga.utilities.log as log
13
14
15def most2nc(input_file, output_file, inverted_bathymetry=False, verbose=True):
16    """Convert a MOST file to NetCDF format.
17
18    input_file           the input file to convert
19    output_file          the name of the oputput NetCDF file to create
20    inverted_bathymetry  ??
21    verbose              True if the function is to be verbose
22    """
23
24    # variable names
25    long_name = 'LON'
26    lat_name = 'LAT'
27    elev_name = 'ELEVATION'
28
29    # set up bathymetry
30    if inverted_bathymetry:
31        up = -1.
32    else:
33        up = +1.
34
35    # read data from the MOST file
36    in_file = open(input_file,'r')
37
38    if verbose: log.critical('reading header')
39
40    nx_ny_str = in_file.readline()
41    nx_str,ny_str = nx_ny_str.split()
42    nx = int(nx_str)
43    ny = int(ny_str)
44    h1_list=[]
45    for i in range(nx):
46        h1_list.append(float(in_file.readline()))
47
48    h2_list=[]
49    for j in range(ny):
50        h2_list.append(float(in_file.readline()))
51
52    h2_list.reverse()
53
54    if verbose: log.critical('reading depths')
55
56    in_depth_list = in_file.readlines()
57    in_file.close()
58
59    out_depth_list = [[]]
60
61    if verbose: log.critical('processing depths')
62
63    k=1
64    for in_line in in_depth_list:
65        for string in in_line.split():
66            #j = k/nx
67            out_depth_list[(k-1)/nx].append(float(string)*up)
68            if k==nx*ny:
69                break
70            if k-(k/nx)*nx ==0:
71                out_depth_list.append([])
72            k+=1
73
74    in_file.close()
75    out_depth_list.reverse()
76    depth_list = out_depth_list
77
78    # write the NetCDF file
79    if verbose: log.critical('writing results')
80
81    out_file = NetCDFFile(output_file, netcdf_mode_w)
82
83    out_file.createDimension(long_name,nx)
84
85    out_file.createVariable(long_name,'d',(long_name,))
86    out_file.variables[long_name].point_spacing='uneven'
87    out_file.variables[long_name].units='degrees_east'
88    out_file.variables[long_name].assignValue(h1_list)
89
90    out_file.createDimension(lat_name,ny)
91    out_file.createVariable(lat_name,'d',(lat_name,))
92    out_file.variables[lat_name].point_spacing='uneven'
93    out_file.variables[lat_name].units='degrees_north'
94    out_file.variables[lat_name].assignValue(h2_list)
95
96    out_file.createVariable(elev_name,'d',(lat_name,long_name))
97    out_file.variables[elev_name].point_spacing='uneven'
98    out_file.variables[elev_name].units='meters'
99    out_file.variables[elev_name].assignValue(depth_list)
100
101    out_file.close()
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