ToJSON() method in otbGeometryMetadata returns a string that is not a valid json
The function does not return a valid json due to trailing comma after the last elements.
// JSON export
std::string ToJSON(bool multiline=false) const;
inline static std::string doubleArrayToString(const double* array)
{
std::ostringstream oss;
oss << "[";
for (int loop = 0 ; loop < 20 ; loop++)
oss << " \"" << array[loop] << "\", ";
oss << "]";
return oss.str();
}