OGRFeature* create_line_feature(const Osmium::OSM::Way* way, OGRLayer* layer) {
OGRFeature* feature = OGRFeature::CreateFeature(layer->GetLayerDefn());
Osmium::Geometry::LineString linestring(*way);
OGRLineString* ogrgeom = Osmium::Geometry::create_ogr_geometry(linestring);
ogrgeom->transform(m_transformation);
feature->SetGeometryDirectly(ogrgeom);
sprintf(longint, "%ld", way->id());
feature->SetField("osm_id", longint);
feature->SetField("z_order", calculate_z_order(way));
feature->SetField("way_area", 0);
return feature;
}
std::unique_ptr<OGRLineString> uncompress() {
std::unique_ptr<OGRLineString> linestring(new OGRLineString);
linestring.get()->addPoint(first.x, first.y);
big_coord_pair prev;
prev.x = first.x;
prev.y = first.y;
for (int i=0; i<=num_points-3; i++) {
linestring.get()->addPoint(prev.x + deltas[i].x, prev.y + deltas[i].y);
prev.x += deltas[i].x;
prev.y += deltas[i].y;
}
linestring.get()->addPoint(last.x, last.y);
return linestring;
}
