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00029 #include "config.h"
00030
00031 static char id[] not_used =
00032 { "$Id: GridGeoConstraint.cc 20518 2009-03-05 23:39:46Z jimg $"
00033 };
00034
00035 #include <cmath>
00036
00037 #include <iostream>
00038 #include <sstream>
00039
00040
00041
00042 #include "debug.h"
00043 #include "dods-datatypes.h"
00044 #include "GridGeoConstraint.h"
00045 #include "Float64.h"
00046
00047 #include "Error.h"
00048 #include "InternalErr.h"
00049 #include "ce_functions.h"
00050 #include "util.h"
00051
00052 using namespace std;
00053
00054 namespace libdap {
00055
00056
00065 GridGeoConstraint::GridGeoConstraint(Grid *grid)
00066 : GeoConstraint(), d_grid(grid), d_latitude(0), d_longitude(0)
00067 {
00068 if (d_grid->get_array()->dimensions() < 2
00069 || d_grid->get_array()->dimensions() > 3)
00070 throw Error("The geogrid() function works only with Grids of two or three dimensions.");
00071
00072
00073 if (!build_lat_lon_maps())
00074 throw Error(string("The grid '") + d_grid->name()
00075 +
00076 "' does not have identifiable latitude/longitude map vectors.");
00077
00078 if (!lat_lon_dimensions_ok())
00079 throw Error("The geogrid() function will only work when the Grid's Longitude and Latitude\nmaps are the rightmost dimensions.");
00080 }
00081
00097 bool GridGeoConstraint::build_lat_lon_maps()
00098 {
00099 Grid::Map_iter m = d_grid->map_begin();
00100
00101
00102
00103 Array::Dim_iter d = d_grid->get_array()->dim_begin();
00104
00105 while (m != d_grid->map_end() && (!d_latitude || !d_longitude)) {
00106 string units_value = (*m)->get_attr_table().get_attr("units");
00107 units_value = remove_quotes(units_value);
00108 string map_name = (*m)->name();
00109
00110
00111
00112 if (!d_latitude
00113 && unit_or_name_match(get_coards_lat_units(), get_lat_names(),
00114 units_value, map_name)) {
00115
00116
00117
00118
00119
00120
00121
00122 d_latitude = dynamic_cast < Array * >(*m);
00123 if (!d_latitude)
00124 throw InternalErr(__FILE__, __LINE__, "Expected an array.");
00125 if (!d_latitude->read_p())
00126 d_latitude->read();
00127
00128 set_lat(extract_double_array(d_latitude));
00129 set_lat_length(d_latitude->length());
00130
00131 set_lat_dim(d);
00132 }
00133
00134 if (!d_longitude
00135 && unit_or_name_match(get_coards_lon_units(), get_lon_names(),
00136 units_value, map_name)) {
00137
00138 d_longitude = dynamic_cast < Array * >(*m);
00139 if (!d_longitude)
00140 throw InternalErr(__FILE__, __LINE__, "Expected an array.");
00141 if (!d_longitude->read_p())
00142 d_longitude->read();
00143
00144 set_lon(extract_double_array(d_longitude));
00145 set_lon_length(d_longitude->length());
00146
00147 set_lon_dim(d);
00148 }
00149
00150 ++m;
00151 ++d;
00152 }
00153
00154 return get_lat() && get_lon();
00155 }
00156
00167 bool
00168 GridGeoConstraint::lat_lon_dimensions_ok()
00169 {
00170
00171 Grid::Map_riter rightmost = d_grid->map_rbegin();
00172 Grid::Map_riter next_rightmost = rightmost + 1;
00173
00174 if (*rightmost == d_longitude && *next_rightmost == d_latitude)
00175 set_longitude_rightmost(true);
00176 else if (*rightmost == d_latitude && *next_rightmost == d_longitude)
00177 set_longitude_rightmost(false);
00178 else
00179 return false;
00180
00181 return true;
00182 }
00183
00205 void GridGeoConstraint::apply_constraint_to_data()
00206 {
00207 if (!get_bounding_box_set())
00208 throw
00209 InternalErr
00210 ("The Latitude and Longitude constraints must be set before calling apply_constraint_to_data().");
00211
00212 Array::Dim_iter fd = d_latitude->dim_begin();
00213 if (get_latitude_sense() == inverted) {
00214 int tmp = get_latitude_index_top();
00215 set_latitude_index_top(get_latitude_index_bottom());
00216 set_latitude_index_bottom(tmp);
00217 }
00218
00219
00220
00221 if (get_latitude_index_top() > get_latitude_index_bottom())
00222 throw Error("The upper and lower latitude indices appear to be reversed. Please provide the latitude bounding box numbers giving the northern-most latitude first.");
00223
00224
00225 d_latitude->add_constraint(fd, get_latitude_index_top(), 1,
00226 get_latitude_index_bottom());
00227 d_grid->get_array()->add_constraint(get_lat_dim(),
00228 get_latitude_index_top(), 1,
00229 get_latitude_index_bottom());
00230
00231
00232
00233
00234 if (get_longitude_index_left() > get_longitude_index_right()) {
00235 reorder_longitude_map(get_longitude_index_left());
00236
00237
00238
00239
00240
00241
00242
00243
00244
00245 reorder_data_longitude_axis(*d_grid->get_array());
00246
00247
00248
00249
00250
00251 set_longitude_index_right(get_lon_length() - get_longitude_index_left()
00252 + get_longitude_index_right());
00253 set_longitude_index_left(0);
00254 }
00255
00256
00257
00258
00259
00260
00261
00262
00263
00264
00265
00266 if (get_longitude_notation() == neg_pos) {
00267 transform_longitude_to_neg_pos_notation();
00268 }
00269
00270 fd = d_longitude->dim_begin();
00271 d_longitude->add_constraint(fd, get_longitude_index_left(), 1,
00272 get_longitude_index_right());
00273
00274 d_grid->get_array()->add_constraint(get_lon_dim(),
00275 get_longitude_index_left(),
00276 1, get_longitude_index_right());
00277
00278
00279 set_array_using_double(d_latitude, get_lat() + get_latitude_index_top(),
00280 get_latitude_index_bottom() - get_latitude_index_top() + 1);
00281
00282 set_array_using_double(d_longitude, get_lon() + get_longitude_index_left(),
00283 get_longitude_index_right() - get_longitude_index_left() + 1);
00284
00285
00286 if (get_array_data()) {
00287
00288 int size = d_grid->get_array()->val2buf(get_array_data());
00289
00290 if (size != get_array_data_size())
00291 throw
00292 InternalErr
00293 ("Expected data size not copied to the Grid's buffer.");
00294 d_grid->set_read_p(true);
00295 }
00296 else {
00297 d_grid->get_array()->read();
00298 }
00299 }
00300
00301 }