Windows Phone 运动轨迹记录工具 (20130404 更新)

轨迹记录工具

带有 GPS 记录功能的运动手表价格不菲，于是我自己写了一个简单的运动轨迹记录工具。核心代码如下，只有不到 200 行。

工具记录的数据可以使用 Isolated Storage Explorer Tool 导出，进行进一步的分析、处理和转换。

下载链接 http://pan.baidu.com/s/1sjO43s5

using System;using System.Collections.Generic;using System.ComponentModel;using System.Device.Location;using System.IO;using System.IO.IsolatedStorage;using System.Text;using System.Windows;using Microsoft.Phone.Controls;using Microsoft.Phone.Shell;namespace Tracker{    public partial class MainPage : PhoneApplicationPage    {        bool tracking;        string logName;        GeoCoordinateWatcher watcher;        List<GeoCoordinate> locations;        List<long> timestamps;        Object lockObject;        public MainPage()        {            tracking = false;            lockObject = new Object();            InitializeComponent();            PhoneApplicationService.Current.ApplicationIdleDetectionMode = IdleDetectionMode.Disabled;            updateLogName();            status.Text = "GPS Tracker by coolypf";            watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.High);            watcher.MovementThreshold = 0.0;            watcher.PositionChanged += onMove;        }        void onMove(object sender, GeoPositionChangedEventArgs<GeoCoordinate> e)        {            if (!tracking || watcher.Status != GeoPositionStatus.Ready)                return;            lock (lockObject)            {                locations.Add(e.Position.Location);                timestamps.Add(e.Position.Timestamp.UtcTicks);            }        }        void updateLogName()        {            IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();            DateTime now = DateTime.Now;            String prefix = now.Year + "-" + now.Month + "-" + now.Day + "-";            String filename;            int idx = 1;            while (true)            {                filename = prefix + idx + ".txt";                if (!isf.FileExists(filename))                    break;                idx++;            }            name.Text = filename;        }        void writeLog()        {            lock (lockObject)            {                if (locations.Count < 2)                    return;                IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();                StreamWriter w = new StreamWriter(isf.OpenFile(logName, FileMode.Create, FileAccess.Write));                for (int i = 0; i < locations.Count; ++i)                {                    w.Write(timestamps[i]);                    w.Write(" ");                    GeoCoordinate g = locations[i];                    w.Write(g.Latitude);                    w.Write(" ");                    w.Write(g.Longitude);                    w.Write(" ");                    w.Write(g.Altitude);                    w.WriteLine();                }                w.Close();            }        }        void onControl(object sender, RoutedEventArgs e)        {            control.IsEnabled = false;            if (tracking)            {                watcher.Stop();                writeLog();                status.Text = getStatus();                control.Content = "Start";                show.IsEnabled = false;                updateLogName();                name.IsEnabled = true;                tracking = false;            }            else            {                name.IsEnabled = false;                logName = name.Text;                locations = new List<GeoCoordinate>();                timestamps = new List<long>();                tracking = true;                watcher.Start();                control.Content = "Stop";                show.IsEnabled = true;            }            control.IsEnabled = true;        }        String getStatus()        {            StringBuilder b = new StringBuilder();            lock (lockObject)            {                b.Append("Tracked positions: ");                b.Append(locations.Count);                b.AppendLine();                if (locations.Count >= 2)                {                    double dist = 0.0, dist_r = 0.0, speed = 0.0;                    long ticks = timestamps[timestamps.Count - 1] - timestamps[0], ticks_r = 0;                    for (int i = 1; i < locations.Count; ++i)                    {                        double dd = locations[i - 1].GetDistanceTo(locations[i]);                        long dt = timestamps[i] - timestamps[i - 1];                        if (dt > 0)                            speed = dd * 1e7 / dt;                        if (speed > 2.0)                        {                            dist_r += dd;                            ticks_r += dt;                        }                        dist += dd;                    }                    b.Append("Total distance: ");                    b.Append(dist * 1e-3);                    b.AppendLine(" km");                    b.Append("Total time: ");                    b.Append(new TimeSpan(ticks).ToString());                    b.AppendLine();                    b.Append("Average speed: ");                    if (ticks > 0)                        speed = dist * 3.6e7 / ticks;                    else                        speed = 0.0;                    b.Append(speed);                    b.AppendLine(" km/h");                    b.Append("Running speed: ");                    if (ticks_r > 0)                        speed = dist_r * 3.6e7 / ticks_r;                    else                        speed = 0.0;                    b.Append(speed);                    b.AppendLine(" km/h");                }            }            return b.ToString();        }        void onShow(object sender, RoutedEventArgs e)        {            if (!tracking)                return;            status.Text = getStatus() + "GPS status: " + watcher.Status.ToString();        }        protected override void OnBackKeyPress(CancelEventArgs e)        {            if (tracking)            {                MessageBoxResult result = MessageBox.Show("Tracking is in progress. If you quit, all recorded data will be lost.", "Quit Tracker?", MessageBoxButton.OKCancel);                if (result != MessageBoxResult.OK)                    e.Cancel = true;            }            base.OnBackKeyPress(e);        }    }}

轨迹处理工具

下面的程序可以处理轨迹数据，进行简单的分析，并将数据转换成 CSV 和 GPX 格式。前者可以用 Excel 打开，后者可以导入 Google Earth 中，并进一步转换成 KMZ 格式导入到 Google Maps 里面。

#include <stdio.h>#include <string.h>#include <math.h>#include <vector>using std::vector;static double distance(double lat1, double lon1, double lat2, double lon2);static void evil_transform(double wg_lat, double wg_lon, double &mg_lat, double &mg_lon);static void bd_encrypt(double gg_lat, double gg_lon, double &bd_lat, double &bd_lon);static void change_extension(char *name, const char *ext);static int date_time(long long ticks, int part);struct Record{long long tick;double lat, lon, alt, speed;};struct Data{long long tick;double lat, lon, alt, speed;double time, dist, acc;};const double running_threshold = 1.9;const double walking_threshold = 0.1;static inline int hour(long long ticks){return (int)((ticks & 0x3fffffffffffffffll) / 0x861c46800ll % 24ll);}static inline int minute(long long ticks){return (int)((ticks & 0x3fffffffffffffffll) / 0x23c34600ll % 60ll);}static inline int second(long long ticks){return (int)((ticks & 0x3fffffffffffffffll) / 0x989680ll % 60ll);}static inline int millisecond(long long ticks){return (int)((ticks & 0x3fffffffffffffffll) / 10000 % 1000);}int main(int argc, char **argv){double sampling_threshold = 2.0;if (argc < 2){fprintf(stderr, "Usage: analyzer tracking_log.txt [sampling_threshold]\nDefault sampling threshold is 2.0 seconds.\n");return 1;}if (argc >= 3){double arg = atof(argv[2]);if (arg > 0.0 && arg < 3600.0)sampling_threshold = arg;}if (strlen(argv[1]) > 4000){fprintf(stderr, "File name too long!\n");return 1;}// Read tracking log recordsstatic char buf[4096];FILE *fp = fopen(argv[1], "r");if (!fp){fprintf(stderr, "Can not open %s\n", argv[1]);return 1;}vector<Record> vr;while (1){if (!fgets(buf, 4096, fp))break;int len = (int)strlen(buf);if (len < 10 || len > 4000){fprintf(stderr, "Invalid line: %d\n", (int)vr.size() + 1);return 1;}Record rec;if (sscanf(buf, "%lld%lf%lf%lf", &rec.tick, &rec.lat, &rec.lon, &rec.alt) != 4){fprintf(stderr, "Invalid line: %d\n", (int)vr.size() + 1);return 1;}vr.push_back(rec);}fclose(fp);// Filter invalid recordsif (vr.size() < 2){fprintf(stderr, "No enough data to analyze!\n");return 1;}vr[0].speed = 0.0;for (size_t i = 1; i < vr.size(); ++i){double dd = distance(vr[i - 1].lat, vr[i - 1].lon, vr[i].lat, vr[i].lon);long long dt = vr[i].tick - vr[i - 1].tick;if (dt > 0)vr[i].speed = dd * 1e7 / dt;elsevr[i].speed = vr[i - 1].speed;}vector<Record> v2;double speed_avg = 0.0, speed_devi = 0.0, speed_limit;for (size_t i = 0; i < vr.size(); ++i)speed_avg += vr[i].speed;speed_avg /= vr.size();for (size_t i = 0; i < vr.size(); ++i)speed_devi += (vr[i].speed - speed_avg) * (vr[i].speed - speed_avg);speed_devi = sqrt(speed_devi / vr.size());speed_limit = speed_avg + 3.0 * speed_devi;//  fprintf(stderr, "speed avg, devi, limit: %.2lf, %.2lf, %.2lf\n", speed_avg, speed_devi, speed_limit);for (size_t i = 0; i < vr.size(); ++i)if (vr[i].speed < speed_limit)v2.push_back(vr[i]);vr.swap(v2);v2.clear();// Resample dataif (vr.size() < 2){fprintf(stderr, "No enough data to analyze!\n");return 1;}vector<Data> vd;{Data dat0;dat0.tick = vr[0].tick;dat0.lat = vr[0].lat;dat0.lon = vr[0].lon;dat0.alt = vr[0].alt;dat0.speed = 0.0;dat0.time = 0.0;dat0.dist = 0.0;dat0.acc = 0.0;vd.push_back(dat0);}long long begin = vr[0].tick;double prev_time = 0.0, dist = 0.0;for (size_t i = 1; i < vr.size(); ++i){double time = (vr[i].tick - begin) * 1e-7;if (i + 1 < vr.size() && time - prev_time < sampling_threshold)continue;long long dt = vr[i].tick - vd.back().tick;if (dt <= 0)continue;Data dat;double dd = distance(vd.back().lat, vd.back().lon, vr[i].lat, vr[i].lon);dist += dd;dat.tick = vr[i].tick;dat.lat = vr[i].lat;dat.lon = vr[i].lon;dat.alt = vr[i].alt;dat.speed = dd * 1e7 / dt;dat.time = time;dat.dist = dist;vd.push_back(dat);prev_time = time;}vr.clear();// Analyze dataif (vd.size() < 2){fprintf(stderr, "No enough data to analyze!\n");return 1;}for (size_t i = 1; i + 1 < vd.size(); ++i){vd[i].acc = (vd[i + 1].speed - vd[i].speed) * 2e7 / (vd[i + 1].tick - vd[i - 1].tick);vd[i].speed = (vd[i].speed * (vd[i + 1].tick - vd[i].tick) + vd[i + 1].speed * (vd[i].tick - vd[i - 1].tick)) / (vd[i + 1].tick - vd[i - 1].tick);}vd.back().speed = 0.0;vd.back().acc = 0.0;double dist_r = 0.0, mx_speed = 0.0;long long time_r = 0, time_w = 0; for (size_t i = 1; i < vd.size(); ++i){double dd = vd[i].dist - vd[i - 1].dist;long long dt = vd[i].tick - vd[i - 1].tick;if (vd[i].speed > running_threshold){dist_r += dd;time_r += dt;if (vd[i].speed > mx_speed)  mx_speed = vd[i].speed;}else if (vd[i].speed > walking_threshold)time_w += dt;}double dist_a = vd.back().dist, dist_w = dist_a - dist_r;long long time_a = vd.back().tick - vd.front().tick, time_s = time_a - time_r - time_w;printf("%30s: %.3lf km\n", "Total distance", dist_a * 1e-3);printf("%30s: %.3lf km\n", "Running distance", dist_r * 1e-3);printf("%30s: %.3lf km\n", "Walking distance", dist_w * 1e-3);printf("%30s: %d h %d m %d.%03d s\n", "Total time", hour(time_a), minute(time_a), second(time_a), millisecond(time_a));printf("%30s: %d h %d m %d.%03d s\n", "Running time", hour(time_r), minute(time_r), second(time_r), millisecond(time_r));printf("%30s: %d h %d m %d.%03d s\n", "Walking time", hour(time_w), minute(time_w), second(time_w), millisecond(time_w));printf("%30s: %d h %d m %d.%03d s\n", "Stopped time", hour(time_s), minute(time_s), second(time_s), millisecond(time_s));printf("%30s: %.2lf m/s , %.2lf km/h\n", "Max speed", mx_speed, mx_speed * 3.6);printf("%30s: %.2lf m/s , %.2lf km/h\n", "Average speed", dist_a * 1e7 / time_a, dist_a * 3.6e7 / time_a);printf("%30s: %.2lf m/s , %.2lf km/h\n", "Average running speed", dist_r * 1e7 / time_r, dist_r * 3.6e7 / time_r);printf("%30s: %.2lf m/s , %.2lf km/h\n", "Average walking speed", dist_w * 1e7 / time_w, dist_w * 3.6e7 / time_w);// Export data to CSVstrcpy(buf, argv[1]);change_extension(buf, ".csv");fp = fopen(buf, "w");if (!fp){fprintf(stderr, "Can not write to %s\n", buf);return 1;}fprintf(fp, "Time(s),Distance(km),Altitude(m),Speed(m/s),Speed(km/h),Acceleration(m/s^2)\n");for (size_t i = 0; i < vd.size(); ++i)fprintf(fp, "%.2lf,%.3lf,%.1lf,%.2lf,%.2lf,%.2lf\n", vd[i].time, vd[i].dist * 1e-3, vd[i].alt, vd[i].speed, vd[i].speed * 3.6, vd[i].acc);fclose(fp);// Export data to GPXconst char gpx_head[] = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?>\n\n""<gpx xmlns=\"http://www.topografix.com/GPX/1/1\" version=\"1.1\" creator=\"Analyzer for WP7Tracker\">\n""<metadata><name>%s</name><link href=\"http://blog.csdn.net/coolypf/\"><text>coolypf</text></link></metadata>\n""<trk><name>%s</name><trkseg>\n";const char gpx_tail[] = "</trkseg></trk></gpx>\n";strcpy(buf, argv[1]);change_extension(buf, ".wgs-84.gpx");fp = fopen(buf, "w");if (!fp){fprintf(stderr, "Can not write to %s\n", buf);return 1;}fprintf(fp, gpx_head, buf, buf);for (size_t i = 0; i < vd.size(); ++i){fprintf(fp, "<trkpt lat=\"%.6lf\" lon=\"%.6lf\"><ele>%.1lf</ele>", vd[i].lat, vd[i].lon, vd[i].alt);long long tick = vd[i].tick;fprintf(fp, "<time>%04d-%02d-%02dT%02d:%02d:%02dZ</time></trkpt>\n",date_time(tick, 0), date_time(tick, 2), date_time(tick, 3),hour(tick), minute(tick), second(tick));}fprintf(fp, gpx_tail);fclose(fp);strcpy(buf, argv[1]);change_extension(buf, ".gcj-02.gpx");fp = fopen(buf, "w");if (!fp){fprintf(stderr, "Can not write to %s\n", buf);return 1;}fprintf(fp, gpx_head, buf, buf);for (size_t i = 0; i < vd.size(); ++i){double lat, lon;evil_transform(vd[i].lat, vd[i].lon, lat, lon);vd[i].lat = lat;vd[i].lon = lon;fprintf(fp, "<trkpt lat=\"%.6lf\" lon=\"%.6lf\"><ele>%.1lf</ele>", vd[i].lat, vd[i].lon, vd[i].alt);long long tick = vd[i].tick;fprintf(fp, "<time>%04d-%02d-%02dT%02d:%02d:%02dZ</time></trkpt>\n",date_time(tick, 0), date_time(tick, 2), date_time(tick, 3),hour(tick), minute(tick), second(tick));}fprintf(fp, gpx_tail);fclose(fp);strcpy(buf, argv[1]);change_extension(buf, ".bd-09.gpx");fp = fopen(buf, "w");if (!fp){fprintf(stderr, "Can not write to %s\n", buf);return 1;}fprintf(fp, gpx_head, buf, buf);for (size_t i = 0; i < vd.size(); ++i){double lat, lon;bd_encrypt(vd[i].lat, vd[i].lon, lat, lon);vd[i].lat = lat;vd[i].lon = lon;fprintf(fp, "<trkpt lat=\"%.6lf\" lon=\"%.6lf\"><ele>%.1lf</ele>", vd[i].lat, vd[i].lon, vd[i].alt);long long tick = vd[i].tick;fprintf(fp, "<time>%04d-%02d-%02dT%02d:%02d:%02dZ</time></trkpt>\n",date_time(tick, 0), date_time(tick, 2), date_time(tick, 3),hour(tick), minute(tick), second(tick));}fprintf(fp, gpx_tail);fclose(fp);return 0;}const double pi = 3.14159265358979324;const double f = pi / 180.0;const double x_pi = f * 3000.0;const double a = 6378245.0;const double ee = 0.00669342162296594323;const double r = 6376500.0;double distance(double lat1, double lon1, double lat2, double lon2){double rad1 = lat1 * f, rad2 = lat2 * f;double dlat = rad2 - rad1, dlon = (lon2 - lon1) * f;double x = pow(sin(dlat / 2.0), 2.0) + (cos(rad1) * cos(rad2)) * pow(sin(dlon / 2.0), 2.0);return r * 2.0 * atan2(sqrt(x), sqrt(1.0 - x));}static bool out_of_mars(double lat, double lon){if (lon < 72.004 || lon > 137.8347)return true;if (lat < 0.8293 || lat > 55.8271)return true;return false;}static double transform_lat(double x, double y){double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * sqrt(fabs(x));ret += (20.0 * sin(6.0 * x * pi) + 20.0 * sin(2.0 * x * pi)) * 2.0 / 3.0;ret += (20.0 * sin(y * pi) + 40.0 * sin(y / 3.0 * pi)) * 2.0 / 3.0;ret += (160.0 * sin(y / 12.0 * pi) + 320 * sin(y * pi / 30.0)) * 2.0 / 3.0;return ret;}static double transform_lon(double x, double y){double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * sqrt(fabs(x));ret += (20.0 * sin(6.0 * x * pi) + 20.0 * sin(2.0 * x * pi)) * 2.0 / 3.0;ret += (20.0 * sin(x * pi) + 40.0 * sin(x / 3.0 * pi)) * 2.0 / 3.0;ret += (150.0 * sin(x / 12.0 * pi) + 300.0 * sin(x / 30.0 * pi)) * 2.0 / 3.0;return ret;}void evil_transform(double wg_lat, double wg_lon, double &mg_lat, double &mg_lon){if (out_of_mars(wg_lat, wg_lon)){    mg_lat = wg_lat;    mg_lon = wg_lon;    return;}double d_lat = transform_lat(wg_lon - 105.0, wg_lat - 35.0);double d_lon = transform_lon(wg_lon - 105.0, wg_lat - 35.0);double rad_lat = wg_lat / 180.0 * pi;double magic = sin(rad_lat);magic = 1 - ee * magic * magic;double sqrt_magic = sqrt(magic);d_lat = (d_lat * 180.0) / ((a * (1 - ee)) / (magic * sqrt_magic) * pi);d_lon = (d_lon * 180.0) / (a / sqrt_magic * cos(rad_lat) * pi);mg_lat = wg_lat + d_lat;mg_lon = wg_lon + d_lon;}void bd_encrypt(double gg_lat, double gg_lon, double &bd_lat, double &bd_lon){double x = gg_lon, y = gg_lat;double z = sqrt(x * x + y * y) + 0.00002 * sin(y * x_pi);double theta = atan2(y, x) + 0.000003 * cos(x * x_pi);bd_lon = z * cos(theta) + 0.0065;bd_lat = z * sin(theta) + 0.006;}void change_extension(char *name, const char *ext){int i = (int)strlen(name);while (1){if (i <= 0 || name[i] == '/' || name[i] =='\\'){i = (int)strlen(name);break;}if (name[i] == '.')break;--i;}strcpy(name + i, ext);}int date_time(long long ticks, int part){const int days_to_month_365[] = { 0, 0x1f, 0x3b, 90, 120, 0x97, 0xb5, 0xd4, 0xf3, 0x111, 0x130, 0x14e, 0x16d };const int days_to_month_366[] = { 0, 0x1f, 60, 0x5b, 0x79, 0x98, 0xb6, 0xd5, 0xf4, 0x112, 0x131, 0x14f, 0x16e };ticks &= 0x3fffffffffffffffll;int num2 = (int)(ticks / 0xc92a69c000ll);int num3 = num2 / 0x23ab1;num2 -= num3 * 0x23ab1;int num4 = num2 / 0x8eac;if (num4 == 4)num4 = 3;num2 -= num4 * 0x8eac;int num5 = num2 / 0x5b5;num2 -= num5 * 0x5b5;int num6 = num2 / 0x16d;if (num6 == 4)num6 = 3;if (part == 0)return num3 * 400 + num4 * 100 + num5 * 4 + num6 + 1;num2 -= num6 * 0x16d;if (part == 1)return num2 + 1;const int *num_array = (num6 == 3 && (num5 != 0x18 || num4 == 3)) ? days_to_month_366 : days_to_month_365;int index = num2 >> 6;while (num2 >= num_array[index])index++;if (part == 2)return index;return num2 - num_array[index - 1] + 1;}