GPS data logger.ino

//ARDUINO IDE CODE

#include <SD.h> //Load SD card library
#include<SPI.h> //Load SPI Library
#include <Adafruit_GPS.h>    //Install the adafruit GPS library
#include <SoftwareSerial.h> //Load the Software Serial library
SoftwareSerial mySerial(3,2); //Initialize the Software Serial port
Adafruit_GPS GPS(&mySerial); //Create the GPS Object
String NMEA1; //Variable for first NMEA sentence
String NMEA2; //Variable for second NMEA sentence
char c; //to read characters coming from the GPS
float deg; //Will hold positin data in simple degree format
float degWhole; //Variable for the whole part of position
float degDec;  //Variable for the decimal part of degree
int chipSelect = 4; //chipSelect pin for the SD card Reader
File mySensorData; //Data object you will write your sesnor data to
void setup() {
  Serial.begin(9600); //Turn on serial monitor
  GPS.begin(9600); //Turn on GPS at 9600 baud
  GPS.sendCommand("$PGCMD,33,0*6D");  //Turn off antenna update nuisance data
  GPS.sendCommand(PMTK_SET_NMEA_OUTPUT_RMCGGA); //Request RMC and GGA Sentences only
  GPS.sendCommand(PMTK_SET_NMEA_UPDATE_1HZ); //Set update rate to 1 hz
  delay(1000);
  pinMode(10, OUTPUT); //Must declare 10 an output and reserve it to keep SD card happy
  SD.begin(chipSelect); //Initialize the SD card reader
  if (SD.exists("NMEA.txt")) { //Delete old data files to start fresh
    SD.remove("NMEA.txt");
  }
  if (SD.exists("GPSData.txt")) { //Delete old data files to start fresh
    SD.remove("GPSData.txt");
  }
}
void loop() {
  readGPS();
  if(GPS.fix==1) { //Only save data if we have a fix
  mySensorData = SD.open("NMEA.txt", FILE_WRITE); //Open file on SD card for writing
  mySensorData.println(NMEA1); //Write first NMEA to SD card
  mySensorData.println(NMEA2); //Write Second NMEA to SD card
  mySensorData.close();  //Close the file
  mySensorData = SD.open("GPSData.txt", FILE_WRITE);
  degWhole=float(int(GPS.longitude/100)); //gives me the whole degree part of Longitude
  degDec = (GPS.longitude - degWhole*100)/60; //give me fractional part of longitude
  deg = degWhole + degDec; //Gives complete correct decimal form of Longitude degrees
  if (GPS.lon=='W') {  //If you are in Western Hemisphere, longitude degrees should be negative
    deg= (-1)*deg;
  }
  mySensorData.print(deg,4); //writing decimal degree longitude value to SD card
  mySensorData.print(","); //write comma to SD card
  degWhole=float(int(GPS.latitude/100)); //gives me the whole degree part of latitude
  degDec = (GPS.latitude - degWhole*100)/60; //give me fractional part of latitude
  deg = degWhole + degDec; //Gives complete correct decimal form of latitude degrees
  if (GPS.lat=='S') {  //If you are in Southern hemisphere latitude should be negative
    deg= (-1)*deg;
  }
  mySensorData.print(deg,4); //writing decimal degree longitude value to SD card
  mySensorData.print(","); //write comma to SD card
  mySensorData.print(GPS.altitude); //write altitude to file
  mySensorData.print(" ");  //format with one white space to delimit data sets
  mySensorData.close();
  }
}
void readGPS() {
  clearGPS();
  while(!GPS.newNMEAreceived()) { //Loop until you have a good NMEA sentence
    c=GPS.read();
  }
  GPS.parse(GPS.lastNMEA()); //Parse that last good NMEA sentence
  NMEA1=GPS.lastNMEA();
   while(!GPS.newNMEAreceived()) { //Loop until you have a good NMEA sentence
    c=GPS.read();
  }
  GPS.parse(GPS.lastNMEA()); //Parse that last good NMEA sentence
  NMEA2=GPS.lastNMEA();
  Serial.println(NMEA1);
  Serial.println(NMEA2);
  Serial.println("");
}
void clearGPS() {  //Clear old and corrupt data from serial port
  while(!GPS.newNMEAreceived()) { //Loop until you have a good NMEA sentence
    c=GPS.read();
  }
  GPS.parse(GPS.lastNMEA()); //Parse that last good NMEA sentence
  while(!GPS.newNMEAreceived()) { //Loop until you have a good NMEA sentence
    c=GPS.read();
  }
  GPS.parse(GPS.lastNMEA()); //Parse that last good NMEA sentence
   while(!GPS.newNMEAreceived()) { //Loop until you have a good NMEA sentence
    c=GPS.read();
  }
  GPS.parse(GPS.lastNMEA()); //Parse that last good NMEA sentence
}


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//KML WRAPPER FOR GPS DATA(LAT&LONG)

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document>
<Style id="yellowPoly">
<LineStyle>
<color>7f00ffff</color>
<width>4</width>
</LineStyle>
<PolyStyle>
<color>7f00ff00</color>
</PolyStyle>
</Style>
<Placemark><styleUrl>#yellowPoly</styleUrl>
<LineString>
<extrude>1</extrude>
<tesselate>1</tesselate>
<altitudeMode>absolute</altitudeMode>
<coordinates>




</coordinates>
</LineString></Placemark>

</Document></kml>