本文整理汇总了C++中osmium::geom::OGRFactory::proj_string方法的典型用法代码示例。如果您正苦于以下问题：C++ OGRFactory::proj_string方法的具体用法？C++ OGRFactory::proj_string怎么用？C++ OGRFactory::proj_string使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类osmium::geom::OGRFactory的用法示例。
在下文中一共展示了OGRFactory::proj_string方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: layer_point_field_id
MyOGRHandler(const std::string& driver_name, const std::string& filename) {
OGRRegisterAll();
OGRSFDriver* driver = OGRSFDriverRegistrar::GetRegistrar()->GetDriverByName(driver_name.c_str());
if (!driver) {
std::cerr << driver_name << " driver not available.\n";
exit(1);
}
CPLSetConfigOption("OGR_SQLITE_SYNCHRONOUS", "FALSE");
const char* options[] = { "SPATIALITE=TRUE", nullptr };
m_data_source = driver->CreateDataSource(filename.c_str(), const_cast<char**>(options));
if (!m_data_source) {
std::cerr << "Creation of output file failed.\n";
exit(1);
}
OGRSpatialReference sparef;
sparef.importFromProj4(m_factory.proj_string().c_str());
m_layer_point = m_data_source->CreateLayer("postboxes", &sparef, wkbPoint, nullptr);
if (!m_layer_point) {
std::cerr << "Layer creation failed.\n";
exit(1);
}
OGRFieldDefn layer_point_field_id("id", OFTReal);
layer_point_field_id.SetWidth(10);
if (m_layer_point->CreateField(&layer_point_field_id) != OGRERR_NONE) {
std::cerr << "Creating id field failed.\n";
exit(1);
}
OGRFieldDefn layer_point_field_operator("operator", OFTString);
layer_point_field_operator.SetWidth(30);
if (m_layer_point->CreateField(&layer_point_field_operator) != OGRERR_NONE) {
std::cerr << "Creating operator field failed.\n";
exit(1);
}
/* Transactions might make things faster, then again they might not.
Feel free to experiment and benchmark and report back. */
m_layer_point->StartTransaction();
m_layer_linestring = m_data_source->CreateLayer("roads", &sparef, wkbLineString, nullptr);
if (!m_layer_linestring) {
std::cerr << "Layer creation failed.\n";
exit(1);
}
OGRFieldDefn layer_linestring_field_id("id", OFTReal);
layer_linestring_field_id.SetWidth(10);
if (m_layer_linestring->CreateField(&layer_linestring_field_id) != OGRERR_NONE) {
std::cerr << "Creating id field failed.\n";
exit(1);
}
OGRFieldDefn layer_linestring_field_type("type", OFTString);
layer_linestring_field_type.SetWidth(30);
if (m_layer_linestring->CreateField(&layer_linestring_field_type) != OGRERR_NONE) {
std::cerr << "Creating type field failed.\n";
exit(1);
}
m_layer_linestring->StartTransaction();
m_layer_polygon = m_data_source->CreateLayer("buildings", &sparef, wkbMultiPolygon, nullptr);
if (!m_layer_polygon) {
std::cerr << "Layer creation failed.\n";
exit(1);
}
OGRFieldDefn layer_polygon_field_id("id", OFTInteger);
layer_polygon_field_id.SetWidth(10);
if (m_layer_polygon->CreateField(&layer_polygon_field_id) != OGRERR_NONE) {
std::cerr << "Creating id field failed.\n";
exit(1);
}
OGRFieldDefn layer_polygon_field_type("type", OFTString);
layer_polygon_field_type.SetWidth(30);
if (m_layer_polygon->CreateField(&layer_polygon_field_type) != OGRERR_NONE) {
std::cerr << "Creating type field failed.\n";
exit(1);
}
m_layer_polygon->StartTransaction();
}示例2: extract
OGREnvelope extract(
Options& options,
osmium::geom::OGRFactory<osmium::geom::Projection>& factory,
osmium::memory::Buffer::t_iterator<osmium::OSMObject> begin,
osmium::memory::Buffer::t_iterator<osmium::OSMObject> relations,
osmium::memory::Buffer::t_iterator<osmium::OSMObject> end,
osmium::Timestamp point_in_time) {
options.vout << "Working on " << point_in_time << "...\n";
options.vout << " Filtering data...\n";
// nodes and ways
using diff_iterator = osmium::DiffIterator<osmium::memory::Buffer::t_iterator<osmium::OSMObject>>;
osmium::memory::Buffer fbuffer{initial_buffer_size, osmium::memory::Buffer::auto_grow::yes};
{
const diff_iterator dbegin{begin, relations};
const diff_iterator dend{relations, relations};
std::for_each(dbegin, dend, [point_in_time, &fbuffer](const osmium::DiffObject& d) {
if (d.is_visible_at(point_in_time)) {
fbuffer.add_item(d.curr());
fbuffer.commit();
}
});
}
options.vout << " Done. Filtered data needs "
<< (fbuffer.committed() / (1024 * 1024))
<< " MBytes.\n";
// relations
osmium::memory::Buffer rbuffer(initial_buffer_size, osmium::memory::Buffer::auto_grow::yes);
{
const diff_iterator dbegin{relations, end};
const diff_iterator dend{end, end};
std::for_each(dbegin, dend, [point_in_time, &rbuffer](const osmium::DiffObject& d) {
if (d.is_visible_at(point_in_time)) {
rbuffer.add_item(d.curr());
rbuffer.commit();
}
});
}
osmium::area::AssemblerLegacy::config_type assembler_config;
osmium::area::MultipolygonManagerLegacy<osmium::area::AssemblerLegacy> mp_manager{assembler_config};
options.vout << " Reading relations...\n";
osmium::apply(rbuffer, mp_manager);
mp_manager.prepare_for_lookup();
index_type index_pos;
location_handler_type location_handler(index_pos);
location_handler.ignore_errors();
options.vout << " Creating geometries...\n";
const std::string date = point_in_time.to_iso().substr(0, 10);
std::vector<std::string> datasource_options;
std::string datasource_name{options.output_directory + "/" + date};
if (options.output_format == "GeoJSON") {
datasource_name += ".json";
} else if (options.output_format == "SQLite") {
datasource_name += ".db";
datasource_options.push_back("SPATIALITE=TRUE");
CPLSetConfigOption("OGR_SQLITE_SYNCHRONOUS", "FALSE");
CPLSetConfigOption("OGR_SQLITE_CACHE", "512");
}
gdalcpp::Dataset dataset{options.output_format, datasource_name, gdalcpp::SRS{factory.proj_string()}, datasource_options};
#ifdef HANDLER
HANDLER geom_handler{factory, dataset, date};
#else
BuildingsHandler geom_handler{factory, dataset, date};
#endif
osmium::apply(fbuffer.begin(),
fbuffer.end(),
location_handler,
geom_handler,
mp_manager.handler([&geom_handler](const osmium::memory::Buffer& buffer) {
osmium::apply(buffer, geom_handler);
}));
return geom_handler.envelope();
}