1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
* (C) Copyright 2005- ECMWF.
*
* This software is licensed under the terms of the Apache Licence Version 2.0
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
*
* In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
* virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
*/
/*
* Description: Nearest neighbour functionality using multiple input points
*
*/
#include "eccodes.h"
static void usage(const char* prog)
{
fprintf(stderr, "Usage: %s latlon_file grib_orography grib_file grib_file ...\n", prog);
fprintf(stderr, " The latlon_file should have 3 columns: num lat lon\n");
fprintf(stderr, " The grib_orography file is treated as the land-sea mask\n");
fprintf(stderr, "\n");
exit(1);
}
int main(int argc, char** argv)
{
FILE* fin = 0;
int ret = 0;
char* fname = 0;
float lat, lon;
double *vlat, *vlon;
int npoints = 0, i = 0, n = 0;
codes_handle* h;
double *outlats, *outlons, *values, *lsm_values, *distances;
int* indexes;
/*long step=0;
char time[10]={0,};
char date[10]={0,};
long parameter=0;
size_t len=0;*/
long iid = 0;
long* id = NULL;
const int is_lsm = 1;
if (argc < 2) usage(argv[0]);
/* input lat/lon file should have 3 columns:
* number latitude longitude
*/
fname = argv[1];
fin = fopen(fname, "r"); /* open in text mode */
if (!fin) {
perror(fname);
exit(1);
}
npoints = 0;
while (fscanf(fin, "%ld %g %g", &iid, &lat, &lon) != EOF)
npoints++;
fclose(fin);
if (npoints==0) {
fprintf(stderr, "No input points found!\n");
exit(1);
}
id = (long*)calloc(npoints, sizeof(long));
if (!id) {
fprintf(stderr, "unable to allocate %ld bytes\n", (long)(npoints * sizeof(long)));
exit(1);
}
vlat = (double*)calloc(npoints, sizeof(double));
if (!vlat) {
fprintf(stderr, "unable to allocate %ld bytes\n", (long)(npoints * sizeof(double)));
exit(1);
}
vlon = (double*)calloc(npoints, sizeof(double));
if (!vlon) {
fprintf(stderr, "unable to allocate %ld bytes\n", (long)(npoints * sizeof(double)));
exit(1);
}
outlats = (double*)calloc(npoints, sizeof(double));
if (!outlats) {
fprintf(stderr, "unable to allocate %ld bytes\n", (long)(npoints * sizeof(double)));
exit(1);
}
outlons = (double*)calloc(npoints, sizeof(double));
if (!outlons) {
fprintf(stderr, "unable to allocate %ld bytes\n", (long)(npoints * sizeof(double)));
exit(1);
}
values = (double*)calloc(npoints, sizeof(double));
if (!values) {
fprintf(stderr, "unable to allocate %ld bytes\n", (long)(npoints * sizeof(double)));
exit(1);
}
lsm_values = (double*)calloc(npoints, sizeof(double));
if (!lsm_values) {
fprintf(stderr, "unable to allocate %ld bytes\n", (long)(npoints * sizeof(double)));
exit(1);
}
distances = (double*)calloc(npoints, sizeof(double));
if (!distances) {
fprintf(stderr, "unable to allocate %ld bytes\n", (long)(npoints * sizeof(double)));
exit(1);
}
indexes = (int*)calloc(npoints, sizeof(int));
if (!indexes) {
fprintf(stderr, "unable to allocate %ld bytes\n", (long)(npoints * sizeof(int)));
exit(1);
}
fname = argv[1];
fin = fopen(fname, "r"); /* open in text mode */
if (!fin) {
perror(fname);
exit(1);
}
i = 0;
while (i < npoints && fscanf(fin, "%ld %g %g", &iid, &lat, &lon) != EOF) {
id[i] = iid;
vlat[i] = lat;
while (lon < 0)
lon += 360;
vlon[i] = lon;
i++;
}
fclose(fin);
/* the first GRIB file on the arguments is treated as the land-sea mask file */
fname = argv[2];
fin = fopen(fname, "rb"); /* open GRIB in binary mode */
if (!fin) {
perror(fname);
exit(1);
}
h = codes_handle_new_from_file(0, fin, PRODUCT_GRIB, &ret);
if (!h || ret != CODES_SUCCESS) {
fprintf(stderr, "unable to create handle\n");
exit(1);
}
codes_grib_nearest_find_multiple(h, is_lsm, vlat, vlon, npoints,
outlats, outlons, lsm_values, distances, indexes);
codes_handle_delete(h);
fclose(fin);
for (n = 3; n <= argc - 1; n++) {
fname = argv[n];
fin = fopen(fname, "r");
if (!fin) {
perror(fname);
exit(1);
}
while ((h = codes_handle_new_from_file(0, fin, PRODUCT_GRIB, &ret)) != NULL) {
codes_get_double_elements(h, "values", indexes, npoints, values);
/*
CODES_CHECK(codes_get_length(h, "date", &len),0);
codes_get_string(h,"date",date,&len);
CODES_CHECK(codes_get_length(h, "time", &len),0);
codes_get_string(h,"time",time,&len);
codes_get_long(h,"step",&step);
codes_get_long(h,"parameter",¶meter);
printf("# %s %s %ld %ld\n",date,time,step,parameter);
*/
codes_handle_delete(h);
for (i = 0; i < npoints; i++)
printf("%ld %.2f %.2f %.2f %.2f %d\n",
id[i], outlats[i], outlons[i],
lsm_values[i], values[i], indexes[i]);
}
fclose(fin);
}
free(id);
free(vlat);
free(vlon);
free(outlats);
free(outlons);
free(values);
free(lsm_values);
free(distances);
free(indexes);
return ret;
}
|
