a C++ geoJSON parser. GeoJSON is a format for encoding a variety of geographic data structures.
JSON parsing is done with gason
https://github.com/vivkin/gason
One argument, geoJSON file
./parser <geojon file>
Storage is done into a list of features
std::vector<feature_t> m_feature;A feature is a list geometries, and a geometry is a list of polygons.
geojson_t geojson;
if (geojson.convert(argv[1]) < 0)
{
return 1;
}
size_t size_features = geojson.m_feature.size();
for (size_t idx_fet = 0; idx_fet < size_features; idx_fet++)
{
feature_t feature = geojson.m_feature.at(idx_fet);
size_t size_geometry = feature.m_geometry.size();
for (size_t idx_geo = 0; idx_geo < size_geometry; idx_geo++)
{
geometry_t geometry = feature.m_geometry.at(idx_geo);
size_t size_pol = geometry.m_polygons.size();
for (size_t idx_pol = 0; idx_pol < size_pol; idx_pol++)
{
polygon_t polygon = geometry.m_polygons[idx_pol];
size_t size_crd = polygon.m_coord.size();
if (size_crd == 0)
{
continue;
}
std::vector<double> lat;
std::vector<double> lon;
for (size_t idx_crd = 0; idx_crd < size_crd; idx_crd++)
{
lat.push_back(polygon.m_coord[idx_crd].m_lat);
lon.push_back(polygon.m_coord[idx_crd].m_lon);
}
if (geometry.m_type.compare("Point") == 0)
{
}
else if (geometry.m_type.compare("Polygon") == 0 ||
geometry.m_type.compare("MultiPolygon") == 0)
{
}
}
}
}{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"properties": {
"name": "name 1",
"marker-color": "#0000ff"
},
"geometry": {
"type": "Point",
"coordinates": [
-77.12911152370515,
38.79930767201779
]
}
},
{
"type": "Feature",
"properties": {
"name": "name 2",
"marker-color": "#0000ff"
},
"geometry": {
"type": "Point",
"coordinates": [
-77.16797018042666,
38.766521892689916
]
}
}
]
}
Render by WxWidgets GUI library
https://github.com/pedro-vicente/render_geojson
Render by Wt web framewwork, Leaflet branch
https://github.com/pedro-vicente/wt
