将上面程序进行可视化操作，并有结果输出界面

好的，可以使用Python的Matplotlib库来进行可视化操作，使用PyQt5库来实现GUI界面。以下是具体实现：

import sys
import numpy as np
from geopy.distance import geodesic
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
from PyQt5 import QtWidgets

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle('NMEA Accuracy Calculator')
        self.setGeometry(100, 100, 800, 600)
        self.central_widget = QtWidgets.QWidget()
        self.setCentralWidget(self.central_widget)
        self.main_layout = QtWidgets.QGridLayout()
        self.central_widget.setLayout(self.main_layout)
        self.create_widgets()
        self.show()

    def create_widgets(self):
        self.file1_label = QtWidgets.QLabel('File 1:')
        self.file1_lineedit = QtWidgets.QLineEdit()
        self.file1_button = QtWidgets.QPushButton('Browse...')
        self.file1_button.clicked.connect(lambda: self.browse_file(self.file1_lineedit))
        self.file2_label = QtWidgets.QLabel('File 2:')
        self.file2_lineedit = QtWidgets.QLineEdit()
        self.file2_button = QtWidgets.QPushButton('Browse...')
        self.file2_button.clicked.connect(lambda: self.browse_file(self.file2_lineedit))
        self.calculate_button = QtWidgets.QPushButton('Calculate')
        self.calculate_button.clicked.connect(self.calculate_accuracy)
        self.rms_label = QtWidgets.QLabel('RMS:')
        self.rms_result = QtWidgets.QLabel()
        self.cep95_label = QtWidgets.QLabel('CEP95:')
        self.cep95_result = QtWidgets.QLabel()
        self.figure = Figure()
        self.canvas = FigureCanvas(self.figure)
        self.main_layout.addWidget(self.file1_label, 0, 0)
        self.main_layout.addWidget(self.file1_lineedit, 0, 1)
        self.main_layout.addWidget(self.file1_button, 0, 2)
        self.main_layout.addWidget(self.file2_label, 1, 0)
        self.main_layout.addWidget(self.file2_lineedit, 1, 1)
        self.main_layout.addWidget(self.file2_button, 1, 2)
        self.main_layout.addWidget(self.calculate_button, 2, 0, 1, 3)
        self.main_layout.addWidget(self.rms_label, 3, 0)
        self.main_layout.addWidget(self.rms_result, 3, 1)
        self.main_layout.addWidget(self.cep95_label, 4, 0)
        self.main_layout.addWidget(self.cep95_result, 4, 1)
        self.main_layout.addWidget(self.canvas, 5, 0, 1, 3)

    def browse_file(self, lineedit):
        file_path, _ = QtWidgets.QFileDialog.getOpenFileName(self, 'Open File', '', 'NMEA Files (*.nmea)')
        if file_path:
            lineedit.setText(file_path)

    def calculate_accuracy(self):
        file_path1 = self.file1_lineedit.text()
        file_path2 = self.file2_lineedit.text()
        if not file_path1 or not file_path2:
            QtWidgets.QMessageBox.warning(self, 'Warning', 'Please select two NMEA files.')
            return
        nmea_data1 = self.read_nmea(file_path1)
        nmea_data2 = self.read_nmea(file_path2)
        positions1 = [(float(d[2]), float(d[4])) for d in nmea_data1]
        positions2 = [(float(d[2]), float(d[4])) for d in nmea_data2]
        distances = []
        for i in range(min(len(positions1), len(positions2))):
            distances.append(geodesic(positions1[i], positions2[i]).meters)
        rms = np.sqrt(np.mean(np.square(distances)))
        cep95 = np.percentile(distances, 95)
        self.rms_result.setText('{:.2f} meters'.format(rms))
        self.cep95_result.setText('{:.2f} meters'.format(cep95))
        self.plot_distances(distances)

    def read_nmea(self, file_path):
        with open(file_path, 'r') as f:
            data = f.readlines()
        nmea_data = []
        for line in data:
            if line.startswith('$GPGGA'):
                nmea_data.append(line.split(','))
        return nmea_data

    def plot_distances(self, distances):
        self.figure.clear()
        ax = self.figure.add_subplot(111)
        ax.hist(distances, bins=50)
        ax.set_xlabel('Distance (meters)')
        ax.set_ylabel('Frequency')
        self.canvas.draw()

if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    window = MainWindow()
    sys.exit(app.exec_())

上面的代码中，`MainWindow`类继承自`QtWidgets.QMainWindow`，用于创建GUI界面。`create_widgets`方法用于创建界面中的各个控件，`browse_file`方法用于弹出文件选择框，`calculate_accuracy`方法用于计算RMS和CEP95，并绘制距离直方图，`read_nmea`方法用于读取NMEA文件中的数据，`plot_distances`方法用于绘制距离直方图。

最后，调用`MainWindow`类即可运行程序，并进行NMEA文件的水平精度误差计算和可视化操作。