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osmcoastline.cpp
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osmcoastline.cpp
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/*
Copyright 2012 Jochen Topf <jochen@topf.org>.
This file is part of OSMCoastline.
OSMCoastline is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OSMCoastline is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OSMCoastline. If not, see <http://www.gnu.org/licenses/>.
*/
#include <fstream>
#include <list>
#include <time.h>
#include <unistd.h>
#include <osmium.hpp>
#include <osmium/geometry/point.hpp>
#include "osmcoastline.hpp"
#include "coastline_ring.hpp"
#include "coastline_ring_collection.hpp"
#include "coastline_polygons.hpp"
#include "output_database.hpp"
#include "output_layers.hpp"
#include "options.hpp"
#include "stats.hpp"
#include "coastline_handlers.hpp"
#include "srs.hpp"
// The global SRS object is used in many places to transform
// from WGS84 to the output SRS etc.
SRS srs;
// Global debug marker
bool debug;
/* ================================================== */
/**
* This function assembles all the coastline rings into one huge multipolygon.
*/
polygon_vector_t* create_polygons(CoastlineRingCollection coastline_rings, OutputDatabase& output) {
std::vector<OGRGeometry*> all_polygons;
coastline_rings.add_polygons_to_vector(all_polygons);
int is_valid;
const char* options[] = { "METHOD=ONLY_CCW", NULL };
OGRGeometry* mega_multipolygon = OGRGeometryFactory::organizePolygons(&all_polygons[0], all_polygons.size(), &is_valid, options);
assert(mega_multipolygon->getGeometryType() == wkbMultiPolygon);
polygon_vector_t* polygons = new polygon_vector_t;
polygons->reserve(static_cast<OGRMultiPolygon*>(mega_multipolygon)->getNumGeometries());
for (int i=0; i < static_cast<OGRMultiPolygon*>(mega_multipolygon)->getNumGeometries(); ++i) {
OGRGeometry* geom = static_cast<OGRMultiPolygon*>(mega_multipolygon)->getGeometryRef(i);
assert(geom->getGeometryType() == wkbPolygon);
OGRPolygon* p = static_cast<OGRPolygon*>(geom);
if (p->IsValid()) {
polygons->push_back(p);
} else {
output.add_error_line(static_cast<OGRLineString*>(p->getExteriorRing()->clone()), "invalid");
OGRGeometry* buf0 = p->Buffer(0);
if (buf0 && buf0->getGeometryType() == wkbPolygon && buf0->IsValid()) {
buf0->assignSpatialReference(srs.wgs84());
polygons->push_back(static_cast<OGRPolygon*>(buf0));
} else {
std::cerr << "Ignoring invalid polygon geometry.\n";
delete buf0;
}
delete p;
}
}
static_cast<OGRMultiPolygon*>(mega_multipolygon)->removeGeometry(-1, FALSE);
return polygons;
}
/* ================================================== */
std::pair<int, int> get_memory_usage() {
char filename[100];
sprintf(filename, "/proc/%d/status", getpid());
std::ifstream status_file(filename);
std::string line;
int vmpeak = 0;
int vmsize = 0;
if (status_file.is_open()) {
while (! status_file.eof() ) {
std::getline(status_file, line);
if (line.substr(0, 6) == "VmPeak") {
int f = line.find_first_of("0123456789");
int l = line.find_last_of("0123456789");
vmpeak = atoi(line.substr(f, l-f+1).c_str());
}
if (line.substr(0, 6) == "VmSize") {
int f = line.find_first_of("0123456789");
int l = line.find_last_of("0123456789");
vmsize = atoi(line.substr(f, l-f+1).c_str());
}
}
status_file.close();
}
return std::make_pair(vmsize / 1024, vmpeak / 1024);
}
std::string memory_usage() {
std::pair<int, int> mem = get_memory_usage();
std::ostringstream s;
s << "Memory used currently: " << mem.first << " MB (Peak was: " << mem.second << " MB).\n";
return s.str();
}
/* ================================================== */
class VerboseOutput {
time_t m_start;
bool m_verbose;
bool m_newline;
public:
VerboseOutput(bool verbose) :
m_start(time(NULL)),
m_verbose(verbose),
m_newline(true)
{ }
int runtime() const {
return time(NULL) - m_start;
}
void start_line() {
if (m_newline) {
int elapsed = time(NULL) - m_start;
char timestr[20];
snprintf(timestr, sizeof(timestr)-1, "[%2d:%02d] ", elapsed / 60, elapsed % 60);
std::cerr << timestr;
m_newline = false;
}
}
template<typename T>
friend VerboseOutput& operator<<(VerboseOutput& out, T t) {
if (out.m_verbose) {
std::ostringstream o;
o << t;
out.start_line();
std::cerr << o.str();
if (o.str()[o.str().size()-1] == '\n') {
out.m_newline = true;
}
}
return out;
}
};
/* ================================================== */
int main(int argc, char *argv[]) {
Stats stats;
unsigned int warnings = 0;
unsigned int errors = 0;
// Parse command line and setup 'options' object with them.
Options options(argc, argv);
// The vout object is an output stream we can write to instead of
// std::cerr. Nothing is written if we are not in verbose mode.
// The running time will be prepended to output lines.
VerboseOutput vout(options.verbose);
// Initialize Osmium.
Osmium::init(options.debug);
debug = options.debug;
vout << "Using SRS " << options.epsg << " for output. (Change with the --srs/s option.)\n";
if (!srs.set_output(options.epsg)) {
std::cerr << "Setting up output transformation failed\n";
exit(return_code_fatal);
}
// Set up output database.
vout << "Writing to output database '" << options.output_database << "'. (Was set with the --output-database/-o option.)\n";
if (options.overwrite_output) {
vout << "Removing database output file (if it exists) (because you told me to with --overwrite/-f).\n";
unlink(options.output_database.c_str());
}
if (options.create_index) {
vout << "Will create geometry index. (If you do not want an index use --no-index/-i.)\n";
} else {
vout << "Will NOT create geometry index (because you told me to using --no-index/-i).\n";
}
OutputDatabase output_database(options.output_database, options.create_index);
// The collection of all coastline rings we will be filling and then
// operating on.
CoastlineRingCollection coastline_rings;
{
// This is in an extra scope so that the considerable amounts of memory
// held by the handlers is recovered after we don't need them any more.
vout << "Reading from file '" << options.inputfile << "'.\n";
Osmium::OSMFile infile(options.inputfile);
vout << "Reading ways (1st pass through input file)...\n";
CoastlineHandlerPass1 handler_pass1(coastline_rings);
infile.read(handler_pass1);
stats.ways = coastline_rings.num_ways();
stats.unconnected_nodes = coastline_rings.num_unconnected_nodes();
stats.rings = coastline_rings.size();
stats.rings_from_single_way = coastline_rings.num_rings_from_single_way();
vout << " There are " << coastline_rings.num_unconnected_nodes() << " nodes where the coastline is not closed.\n";
vout << " There are " << coastline_rings.size() << " coastline rings ("
<< coastline_rings.num_rings_from_single_way() << " from a single way and "
<< coastline_rings.size() - coastline_rings.num_rings_from_single_way() << " from multiple ways).\n";
vout << memory_usage();
vout << "Reading nodes (2nd pass through input file)...\n";
CoastlineHandlerPass2 handler_pass2(coastline_rings, output_database);
infile.read(handler_pass2);
}
vout << memory_usage();
output_database.set_options(options);
if (options.close_rings) {
vout << "Close broken rings... (Use --close-distance/-c 0 if you do not want this.)\n";
vout << " Closing if distance between nodes smaller than " << options.close_distance << ". (Set this with --close-distance/-c.)\n";
coastline_rings.close_rings(output_database, options.debug, options.close_distance);
stats.rings_fixed = coastline_rings.num_fixed_rings();
vout << " Closed " << coastline_rings.num_fixed_rings() << " rings. This left "
<< coastline_rings.num_unconnected_nodes() << " nodes where the coastline could not be closed.\n";
} else {
vout << "Not closing broken rings (because you used the option --close-distance/-c 0).\n";
}
if (options.output_rings) {
vout << "Writing out rings... (Because you gave the --output-rings/-r option.)\n";
warnings += coastline_rings.output_rings(output_database);
} else {
vout << "Not writing out rings. (Use option --output-rings/-r if you want the rings.)\n";
}
if (options.output_polygons) {
vout << "Create polygons...\n";
CoastlinePolygons coastline_polygons(create_polygons(coastline_rings, output_database), output_database, options.bbox_overlap, options.max_points_in_polygon);
stats.land_polygons_before_split = coastline_polygons.num_polygons();
vout << "Fixing coastlines going the wrong way...\n";
stats.rings_turned_around = coastline_polygons.fix_direction();
vout << " Turned " << stats.rings_turned_around << " polygons around.\n";
warnings += stats.rings_turned_around;
if (options.epsg != 4326) {
vout << "Transforming polygons to EPSG " << options.epsg << "...\n";
coastline_polygons.transform();
}
if (options.simplify) {
vout << "Simplifying polygons with tolerance " << options.tolerance << " (because you used --simplify/-S).\n";
coastline_polygons.simplify(options.tolerance);
}
if (options.split_large_polygons || options.water) {
vout << "Split polygons with more than " << options.max_points_in_polygon << " points... (Use --max-points/-m to change this. Set to 0 not to split at all.)\n";
vout << " Using overlap of " << options.bbox_overlap << " (Set this with --bbox-overlap/-b).\n";
coastline_polygons.split();
stats.land_polygons_after_split = coastline_polygons.num_polygons();
}
if (options.water) {
vout << "Writing out water polygons...\n";
coastline_polygons.output_water_polygons();
} else {
coastline_polygons.output_land_polygons();
}
} else {
vout << "Not creating polygons (Because you set the --no-polygons/-p option).\n";
}
vout << memory_usage();
vout << "Commiting database transactions...\n";
output_database.set_meta(vout.runtime(), get_memory_usage().second, stats);
output_database.commit();
vout << "All done.\n";
vout << memory_usage();
vout << "There were " << warnings << " warnings.\n";
vout << "There were " << errors << " errors.\n";
if (errors) {
return return_code_error;
} else if (warnings) {
return return_code_warning;
} else {
return return_code_ok;
}
}