| 1 | //License: GPL. Copyright 2008 by Christoph Brill |
| 2 | |
| 3 | package org.openstreetmap.josm.io; |
| 4 | |
| 5 | import java.io.BufferedReader; |
| 6 | import java.io.File; |
| 7 | import java.io.IOException; |
| 8 | import java.io.InputStream; |
| 9 | import java.io.InputStreamReader; |
| 10 | import java.text.ParseException; |
| 11 | import java.text.SimpleDateFormat; |
| 12 | import java.util.ArrayList; |
| 13 | import java.util.Calendar; |
| 14 | import java.util.Collection; |
| 15 | import java.util.Date; |
| 16 | |
| 17 | import org.openstreetmap.josm.data.coor.LatLon; |
| 18 | import org.openstreetmap.josm.data.gpx.GpxData; |
| 19 | import org.openstreetmap.josm.data.gpx.GpxTrack; |
| 20 | import org.openstreetmap.josm.data.gpx.WayPoint; |
| 21 | |
| 22 | /** |
| 23 | * Read a nmea file. Based on information from |
| 24 | * http://www.kowoma.de/gps/zusatzerklaerungen/NMEA.htm |
| 25 | * |
| 26 | * @author cbrill |
| 27 | */ |
| 28 | public class NmeaReader { |
| 29 | |
| 30 | /** Handler for the different types that NMEA speaks. */ |
| 31 | public static enum NMEA_TYPE { |
| 32 | |
| 33 | /** RMC = recommended minimum sentence C. */ |
| 34 | GPRMC("$GPRMC"), |
| 35 | /** GPS positions. */ |
| 36 | GPGGA("$GPGGA"), |
| 37 | /** SA = satellites active. */ |
| 38 | GPGSA("$GPGSA"); |
| 39 | |
| 40 | private final String type; |
| 41 | |
| 42 | NMEA_TYPE(String type) { |
| 43 | this.type = type; |
| 44 | } |
| 45 | |
| 46 | public String getType() { |
| 47 | return this.type; |
| 48 | } |
| 49 | |
| 50 | public boolean equals(String type) { |
| 51 | return this.type.equals(type); |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | private static final int TYPE = 0; |
| 56 | |
| 57 | // The following only applies to GPRMC |
| 58 | public static enum GPRMC { |
| 59 | TIME(1), |
| 60 | /** Warning from the receiver (A = data ok, V = warning) */ |
| 61 | RECEIVER_WARNING(2), |
| 62 | WIDTH_NORTH(3), |
| 63 | WIDTH_NORTH_NAME(4), |
| 64 | LENGTH_EAST(5), |
| 65 | LENGTH_EAST_NAME(6), |
| 66 | /** Speed in knots */ |
| 67 | SPEED(7), |
| 68 | COURSE(8), |
| 69 | DATE(9), |
| 70 | /** magnetic declination */ |
| 71 | MAGNETIC_DECLINATION(10), |
| 72 | UNKNOWN(11), |
| 73 | /** Mode (A = autonom; D = differential; E = estimated; N = not valid; S = simulated) |
| 74 | * @since NMEA 2.3 */ |
| 75 | MODE(12); |
| 76 | |
| 77 | public final int position; |
| 78 | |
| 79 | GPRMC(int position) { |
| 80 | this.position = position; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | // The following only applies to GPGGA |
| 85 | public static enum GPGGA { |
| 86 | TIME(1), |
| 87 | LATITUDE(2), |
| 88 | LATITUDE_NAME(3), |
| 89 | LONGITUDE(4), |
| 90 | LONGITUDE_NAME(5), |
| 91 | /** Quality (0 = invalid, 1 = GPS, 2 = DGPS, 6 = estimanted (@since NMEA 2.3)) */ |
| 92 | QUALITY(6), |
| 93 | SATELLITE_COUNT(7), |
| 94 | /** HDOP (horizontal dilution of precision) */ |
| 95 | HDOP(8), |
| 96 | /** height above NN (above geoid) */ |
| 97 | HEIGHT(9), |
| 98 | HEIGHT_UNTIS(10), |
| 99 | /** height geoid - height ellipsoid (WGS84) */ |
| 100 | HEIGHT_2(11), |
| 101 | HEIGHT_2_UNTIS(12); |
| 102 | |
| 103 | public final int position; |
| 104 | |
| 105 | GPGGA(int position) { |
| 106 | this.position = position; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | // The following only applies to GPGGA |
| 111 | public static enum GPGSA { |
| 112 | AUTOMATIC(1), |
| 113 | /** 1 = not fixed, 2 = 2D fixed, 3 = 3D fixed) */ |
| 114 | FIX_TYPE(2), |
| 115 | // PRN numbers for max 12 satellites |
| 116 | PRN_1(3), |
| 117 | PRN_2(4), |
| 118 | PRN_3(5), |
| 119 | PRN_4(6), |
| 120 | PRN_5(7), |
| 121 | PRN_6(8), |
| 122 | PRN_7(9), |
| 123 | PRN_8(10), |
| 124 | PRN_9(11), |
| 125 | PRN_10(12), |
| 126 | PRN_11(13), |
| 127 | PRN_12(14), |
| 128 | /** PDOP (precision) */ |
| 129 | PDOP(15), |
| 130 | /** HDOP (horizontal precision) */ |
| 131 | HDOP(16), |
| 132 | /** VDOP (vertical precision) */ |
| 133 | VDOP(17), |
| 134 | ; |
| 135 | |
| 136 | public final int position; |
| 137 | |
| 138 | GPGSA(int position) { |
| 139 | this.position = position; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | public GpxData data; |
| 144 | |
| 145 | public NmeaReader(InputStream source, File relativeMarkerPath) { |
| 146 | data = new GpxData(); |
| 147 | GpxTrack currentTrack = new GpxTrack(); |
| 148 | Collection<WayPoint> currentTrackSeg = new ArrayList<WayPoint>(); |
| 149 | currentTrack.trackSegs.add(currentTrackSeg); |
| 150 | data.tracks.add(currentTrack); |
| 151 | |
| 152 | BufferedReader rd; |
| 153 | String nmeaWithChecksum; |
| 154 | |
| 155 | Calendar lastKnownDate = null; |
| 156 | try { |
| 157 | rd = new BufferedReader(new InputStreamReader(source)); |
| 158 | while ((nmeaWithChecksum = rd.readLine()) != null) { |
| 159 | String[] nmeaAndChecksum = nmeaWithChecksum.split("\\*"); |
| 160 | String nmea = nmeaAndChecksum[0]; |
| 161 | String checksum = nmeaAndChecksum[1]; |
| 162 | String[] e = nmea.split(","); |
| 163 | if (NMEA_TYPE.GPGGA.equals(e[TYPE])) { |
| 164 | WayPoint currentWayPoint = new WayPoint(parseLatLon(e)); |
| 165 | |
| 166 | if (lastKnownDate != null) { |
| 167 | try { |
| 168 | Date time; |
| 169 | if (e[GPGGA.TIME.position].contains(".")) { |
| 170 | time = new SimpleDateFormat("HHmmss.SSS").parse(e[GPGGA.TIME.position]); |
| 171 | } else { |
| 172 | time = new SimpleDateFormat("HHmmss").parse(e[GPGGA.TIME.position]); |
| 173 | } |
| 174 | Calendar cal = Calendar.getInstance(); |
| 175 | cal.setTime(time); |
| 176 | cal.set(lastKnownDate.get(Calendar.YEAR), lastKnownDate.get(Calendar.MONTH), lastKnownDate.get(Calendar.DAY_OF_MONTH)); |
| 177 | currentWayPoint.time = cal.getTimeInMillis() / 1000.0; |
| 178 | } catch (ParseException e1) { |
| 179 | e1.printStackTrace(); |
| 180 | } |
| 181 | } |
| 182 | currentTrackSeg.add(currentWayPoint); |
| 183 | } else if (NMEA_TYPE.GPRMC.equals(e[TYPE])) { |
| 184 | try { |
| 185 | Date date = new SimpleDateFormat("ddMMyy").parse(e[GPRMC.DATE.position]); |
| 186 | lastKnownDate = Calendar.getInstance(); |
| 187 | lastKnownDate.setTime(date); |
| 188 | } catch (ParseException e1) { |
| 189 | // Don't care |
| 190 | } |
| 191 | } |
| 192 | } |
| 193 | rd.close(); |
| 194 | } catch (final IOException e) { |
| 195 | System.out.println("Error reading file"); |
| 196 | } |
| 197 | |
| 198 | } |
| 199 | |
| 200 | private LatLon parseLatLon(String[] e) { |
| 201 | return new LatLon(Double.parseDouble(e[GPGGA.LATITUDE.position]), Double.parseDouble(e[GPGGA.LONGITUDE.position])); |
| 202 | } |
| 203 | } |