int x_steps = std::min(max_x - min_x, 250);
int x_step_size = std::max(1, int(std::ceil((max_x - min_x) / x_steps)));
int y_steps = int(std::ceil(250 * 250 / x_steps));
int y_step_size = std::max(1, int(std::ceil((max_y - min_y) / y_steps)));