void OgrFileImport::importLayer(MapPart* map_part, OGRLayerH layer)
{
Q_ASSERT(map_part);
auto feature_definition = OGR_L_GetLayerDefn(layer);
OGR_L_ResetReading(layer);
while (auto feature = ogr::unique_feature(OGR_L_GetNextFeature(layer)))
{
auto geometry = OGR_F_GetGeometryRef(feature.get());
if (!geometry || OGR_G_IsEmpty(geometry))
{
++empty_geometries;
continue;
}
OGR_G_FlattenTo2D(geometry);
importFeature(map_part, feature_definition, feature.get(), geometry);
}
}
int export_areas_multi(struct Map_info *In, int field, int donocat,
OGRFeatureDefnH Ogr_featuredefn,OGRLayerH Ogr_layer,
struct field_info *Fi, dbDriver *driver, int ncol, int *colctype,
const char **colname, int doatt, int nocat,
int *n_noatt, int *n_nocat)
{
int i, n_exported, area;
int cat, ncats_field, line, type, findex, ipart;
struct line_pnts *Points;
struct line_cats *Cats;
struct ilist *cat_list, *line_list, *lcats;
OGRGeometryH Ogr_geometry, Ogr_geometry_part;
OGRFeatureH Ogr_feature;
OGRwkbGeometryType wkbtype, wkbtype_part;
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
cat_list = Vect_new_list();
line_list = Vect_new_list();
lcats = Vect_new_list();
n_exported = 0;
/* check if category index is available for given field */
findex = Vect_cidx_get_field_index(In, field);
if (findex == -1)
G_fatal_error(_("Unable to export multi-features. No category index for layer %d."),
field);
/* determine type */
wkbtype_part = wkbPolygon;
wkbtype = get_multi_wkbtype(wkbtype_part);
ncats_field = Vect_cidx_get_unique_cats_by_index(In, findex, cat_list);
G_debug(1, "n_cats = %d for layer %d", ncats_field, field);
if (donocat)
G_message(_("Exporting features with category..."));
for (i = 0; i < cat_list->n_values; i++) {
G_percent(i, cat_list->n_values - 1, 5);
cat = cat_list->value[i];
/* find all centroids with given category */
Vect_cidx_find_all(In, field, GV_CENTROID, cat, line_list);
/* create multi-feature */
Ogr_geometry = OGR_G_CreateGeometry(wkbtype);
/* build simple features geometry, go through all parts */
for (ipart = 0; ipart < line_list->n_values; ipart++) {
line = line_list->value[ipart];
G_debug(3, "cat=%d, line=%d -> part=%d", cat, line, ipart);
/* get centroid's category */
Vect_read_line(In, NULL, Cats, line);
/* check for category consistency */
Vect_field_cat_get(Cats, field, lcats);
if (!Vect_val_in_list(lcats, cat))
G_fatal_error(_("Unable to create multi-feature. "
"Category %d not found in line %d, field %d"),
cat, line, field);
/* find correspoding area */
area = Vect_get_centroid_area(In, line);
if (area == 0)
continue;
/* create polygon from area */
Ogr_geometry_part = create_polygon(In, area, Points);
/* add part */
OGR_G_AddGeometryDirectly(Ogr_geometry, Ogr_geometry_part);
}
if (!OGR_G_IsEmpty(Ogr_geometry)) {
/* write multi-feature */
Ogr_feature = OGR_F_Create(Ogr_featuredefn);
OGR_F_SetGeometry(Ogr_feature, Ogr_geometry);
mk_att(cat, Fi, driver, ncol, colctype, colname, doatt, nocat,
Ogr_feature, n_noatt);
OGR_L_CreateFeature(Ogr_layer, Ogr_feature);
OGR_F_Destroy(Ogr_feature);
n_exported++;
}
else {
/* skip empty features */
G_debug(3, "multi-feature is empty -> skipped");
}
OGR_G_DestroyGeometry(Ogr_geometry);
}
if (donocat)
G_message(_("Exporting features without category..."));
/* check lines without category, if -c flag is given write them as
* one multi-feature */
Ogr_geometry = OGR_G_CreateGeometry(wkbtype);
Vect_rewind(In);
Vect_set_constraint_type(In, GV_CENTROID);
while(TRUE) {
type = Vect_read_next_line(In, NULL, Cats);
if (type < 0)
break;
/* get centroid's category */
Vect_cat_get(Cats, field, &cat);
if (cat > 0)
continue; /* skip features with category */
if (cat < 0 && !donocat) {
(*n_nocat)++;
continue; /* skip lines without category, do not export
* not labeled */
}
/* find correspoding area */
line = Vect_get_next_line_id(In);
area = Vect_get_centroid_area(In, line);
if (area == 0)
continue;
/* create polygon from area */
Ogr_geometry_part = create_polygon(In, area, Points);
/* add part */
OGR_G_AddGeometryDirectly(Ogr_geometry, Ogr_geometry_part);
(*n_nocat)++;
}
if (!OGR_G_IsEmpty(Ogr_geometry)) {
/* write multi-feature */
Ogr_feature = OGR_F_Create(Ogr_featuredefn);
OGR_F_SetGeometry(Ogr_feature, Ogr_geometry);
mk_att(cat, Fi, driver, ncol, colctype, colname, doatt, nocat,
Ogr_feature, n_noatt);
OGR_L_CreateFeature(Ogr_layer, Ogr_feature);
OGR_F_Destroy(Ogr_feature);
n_exported++;
}
else {
/* skip empty features */
G_debug(3, "multi-feature is empty -> skipped");
}
OGR_G_DestroyGeometry(Ogr_geometry);
Vect_destroy_line_struct(Points);
Vect_destroy_cats_struct(Cats);
Vect_destroy_list(cat_list);
Vect_destroy_list(line_list);
Vect_destroy_list(lcats);
return n_exported;
}
