# Load several XML to analyse them

**URL:** <https://discourse.processing.org/t/load-several-xml-to-analyse-them/5058>\
**Category:** Coding Questions\
**Created:** [October 31, 2018, 4:10pm UTC](https://discourse.processing.org/t/load-several-xml-to-analyse-them/5058 "2018-10-31T16:10:13Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![Pr0tonX](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/pr0tonx/32/2590_2.png) [@Pr0tonX](https://discourse.processing.org/u/Pr0tonX)\
**Post date:** [October 31, 2018, 4:10pm UTC](https://discourse.processing.org/t/load-several-xml-to-analyse-them/5058/1 "2018-10-31T16:10:13Z")

</div>

Hi everyone,

I’m trying to visualize some journeys wich are encoded in XML files. These files give me the position (lattitude and longitude), the date/time, and some others informations that I don’t need.

I write a program to display the journey ; with points for all points marked, and a line between the points (its wheight depends on the time past between the two points). My purpose is to display a map of the journey in wich the attendance modify the saturation of the color of the line, and the time past during a portion of the course modify weight of the outline.

It’s not completely finished, but I have no idea on how to load all the XML in the same time for preload the max and min of the latitude, longitude, and time. I can find it easily for one XML, but only one…

I tried to put all my XML in an array ; but it’s not working due to methods used after. I thought i can load one after the other all my XML in order to find the bigger max/min of my variables, and then run the draw for display the drawing.

```auto
XML xml;
XML[] trackpoints;
double lat; 
double lon;
float latitude1; 
float longitude1;
float latitude; 
float longitude;
float taille;
float Time;
float time2;
float[] time_spent;
String[] tstamp;
float minTime_spent; 
float maxTime_spent;
double longMax; 
double longMin;
double latMin;
double latMax;

//XML Persona1
/*Longmin= -1.5762523603616678 
 Longmax=-1.51827744  
 Latmin= 47.17566217418081 
 Latmax= 47.28254926 */

void setup() {
  size(1350, 850);
  xml = loadXML("2823481.xml");//loadXML("2823482.xml"),loadXML("2823483.xml",loadXML("2823484.xml"),loadXML("2823485.xml"),loadXML("2823486.xml");
  //loadXML("2823479.xml");//loadXML("2823480.xml");//
  trackpoints = xml.getChildren("trk")[0].getChildren("trkseg")[0].getChildren("trkpt");
  longMax =-1.51827744 ;// trackpoints[0].getDouble("lon");
  longMin= -1.5762523603616678;//trackpoints[0].getDouble("lon");
  latMax =47.28254926;//trackpoints[0].getDouble("lat");
  latMin = 47.17566217418081 ;// trackpoints[0].getDouble("lat");
  String t1 = trackpoints[0].getChildren("time")[0].getContent();
  tstamp = t1.split("T")[1].split("\\.")[0].split(":");

  Time = float(tstamp[0])*3600 + float(tstamp[1])*60 + float(tstamp[2]);
  time2 = float(tstamp[0])*3600 + float(tstamp[1])*60 + float(tstamp[2]);
  time_spent = new float[trackpoints.length];

  for (int i = 0; i < trackpoints.length; i++) {

    lat = trackpoints[i].getDouble("lat");
    lon = trackpoints[i].getDouble("lon");
    String t = trackpoints[i].getChildren("time")[0].getContent();
    // println(trackpoints[i]);
    tstamp = t.split("T")[1].split("\\.")[0].split(":"); //get only the time

    if (lon>longMax) { //parcourt les valeurs max et min de longitude et latitude, for the max/min of longitude...
      longMax = lon;
      //print("longmax=", longMax);
    } 
    if (lon<longMin) { 
      // println("longmin=", longMin);
      longMin = lon;
    }
    if (lat>latMax) { //parcourt les valeurs max et min de longitude et latitude, and the max/min of latitude
      latMax = lat;
      // print("LATMAX=", latMax);
    } 
    if (lat<latMin) { 
      // println("LATMIN=", latMin);
      latMin = lat;
    }

    Time = float(tstamp[0])*3600 + float(tstamp[1])*60 + float(tstamp[2]); // valeur de time unique, unique value of time in sec

    time_spent[i] = Time-time2; //temps passé entre deux points, time spent between 2 points
    time2 = Time; //récupère l'ancienne valeur de time, value n-1 of Time
    // println("time_spent=",time_spent[i]);

    longitude = (float)trackpoints[0].getDouble("lon");
    latitude = (float)trackpoints[0].getDouble("lat");

    // printArray(tstamp);
  } //for trackpoints.length
  println(lat, lon, "longMin et Max =", longMin, longMax, "latMin et Max =", latMin, latMax);

  for (int i =0; i<time_spent.length; i++) {
    if (time_spent[i]>maxTime_spent) {
      maxTime_spent =time_spent[i];
    }
    if (time_spent[i]<minTime_spent) {
      minTime_spent = time_spent[i];
    }
  }
  println("min et maxtime =", minTime_spent, maxTime_spent);
  latitude = map((float)lat, (float)latMin, (float)latMax, 50, width-50); //convert into the scale of the window
  longitude = map((float)lon, (float)longMin, (float)longMax, 30, height-30); //for first line, to not connect it to the origin
  latitude1 = latitude ;
  longitude1 = longitude;
}

void draw() {
  pushMatrix();

  for (int i = 0; i < trackpoints.length; i++) {

    lat = trackpoints[i].getDouble("lat");
    lon = trackpoints[i].getDouble("lon");
    String t = trackpoints[i].getChildren("time")[0].getContent();
    tstamp = t.split("T")[1].split("\\.")[0].split(":");
    taille = map(time_spent[i], minTime_spent, maxTime_spent, 1, 13);

    latitude = map((float)lat, (float)latMin, (float)latMax, 50, width-50); //convert into the scale of the window
    longitude = map((float)lon, (float)longMin, (float)longMax, 30, height-30);
    println("latitude", i, "=", latitude, "//longitude", i, " =", longitude);
    /* println("latitude1-latitude=",abs(latitude1-latitude));
     println("longitude1-longitude",abs(longitude1-longitude));
     */
    if ((abs(latitude1-latitude)<15) && (abs(longitude1-longitude)<15)) { //get together points that they're near 
      latitude = latitude1;
      longitude =longitude1;
      taille = map(time_spent[i-1], minTime_spent, maxTime_spent, 0.5, 10) + map(time_spent[i], minTime_spent, maxTime_spent, 0.5, 10);
      println("point à ressembler");
    }

    stroke(120, 20, 0);
    strokeWeight(taille); //weight depends on time past
    line(latitude1, longitude1, latitude, longitude);
    ellipse(latitude, longitude, taille, taille);
    latitude1 = latitude ;
    longitude1 = longitude;
  }

  popMatrix();
  saveFrame("TESTxml.png");
}

```

Thanks !

---

<div class="post-metadata">

**Author:** ![jeremydouglass](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/jeremydouglass/32/20_2.png) [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)\
**Post date:** [November 2, 2018, 3:58pm UTC](https://discourse.processing.org/t/load-several-xml-to-analyse-them/5058/2 "2018-11-02T15:58:58Z")

</div>

> [@Pr0tonX](#):
>
> These files give me the position (lattitude and longitude), the date/time, and some others informations that I don’t need.

Can you share a simple example of one of your XML files? You can leave out some of the information you don’t need if there is a lot – just provide a valid XML file with the information you do need in it.

---

<div class="post-metadata">

**Author:** ![Pr0tonX](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/pr0tonx/32/2590_2.png) [@Pr0tonX](https://discourse.processing.org/u/Pr0tonX)\
**Post date:** [November 2, 2018, 6:55pm UTC](https://discourse.processing.org/t/load-several-xml-to-analyse-them/5058/3 "2018-11-02T18:55:50Z")

</div>

Of course. I can’t upload an XML so you’ll have to make it with this 🙂

```auto
<gpx version="1.0" creator="GPSLogger 97 - http://gpslogger.mendhak.com/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.topografix.com/GPX/1/0" xsi:schemaLocation="http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd"><time>2018-10-12T22:01:28.000Z</time><trk><trkseg><trkpt lat="47.20349425744051" lon="-1.5695211822085458"><ele>33.999796711839736</ele><time>2018-10-12T22:01:28.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>11</sat><hdop>0.861</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20371054298847" lon="-1.5694389628583754"><ele>57.21704855095595</ele><time>2018-10-12T22:02:15.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>14</sat><hdop>0.735</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20369311292399" lon="-1.5695292282368303"><ele>66.10760809760541</ele><time>2018-10-12T22:02:43.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>10</sat><hdop>0.985</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.203935751806995" lon="-1.5694116571391599"><ele>70.85451869852841</ele><time>2018-10-12T22:03:10.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>7</sat><hdop>1.814</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.203935751806995" lon="-1.5694116571391599"><ele>70.85451869852841</ele><time>2018-10-12T22:03:31.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>12</sat><hdop>0.790</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.203861288580704" lon="-1.5694306841843788"><ele>69.329120606184</ele><time>2018-10-12T22:03:53.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>14</sat><hdop>0.735</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20387304454464" lon="-1.5695063800267262"><ele>74.26585341989994</ele><time>2018-10-12T22:05:04.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>11</sat><hdop>0.953</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20373585466371" lon="-1.5694305205958627"><ele>72.83865458704531</ele><time>2018-10-12T22:05:31.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>12</sat><hdop>0.777</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20371101219211" lon="-1.5694651007220544"><ele>91.7788194520399</ele><time>2018-10-12T22:06:23.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>13</sat><hdop>0.776</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20375478030817" lon="-1.569513783721165"><ele>60.33738913293928</ele><time>2018-10-12T22:07:04.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>10</sat><hdop>0.911</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20363023371362" lon="-1.5693978148721213"><ele>68.00777916237712</ele><time>2018-10-12T22:07:31.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>12</sat><hdop>1.025</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.203753312394724" lon="-1.5694790437195074"><ele>73.5576301086694</ele><time>2018-10-12T22:08:09.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>12</sat><hdop>0.872</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20380123644595" lon="-1.569499838261445"><ele>70.38934893067926</ele><time>2018-10-12T22:08:39.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>12</sat><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20417194005279" lon="-1.5647295398780667"><ele>54.09139933809638</ele><time>2018-10-12T22:12:43.000Z</time><course>87.229355</course><speed>1.4427516</speed><src>gps</src><sat>19</sat><hdop>0.661</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20423308902389" lon="-1.5641281700012981"><ele>48.909449672326446</ele><time>2018-10-12T22:13:04.000Z</time><course>85.43315</course><speed>1.8634235</speed><src>gps</src><sat>18</sat><hdop>0.661</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20428129680647" lon="-1.5635735895118132"><ele>48.83859606273472</ele><time>2018-10-12T22:13:25.000Z</time><course>72.587585</course><speed>1.6670016</speed><src>gps</src><sat>20</sat><hdop>0.603</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20435423573269" lon="-1.5630550569587767"><ele>50.94407127890736</ele><time>2018-10-12T22:13:46.000Z</time><course>95.8904</course><speed>1.6306335</speed><src>gps</src><sat>19</sat><hdop>0.622</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.204321911282584" lon="-1.562484269935951"><ele>56.30207472573966</ele><time>2018-10-12T22:14:07.000Z</time><course>118.47932</course><speed>1.7754682</speed><src>gps</src><sat>20</sat><hdop>0.604</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20430927480848" lon="-1.5620230176793892"><ele>62.39413719251752</ele><time>2018-10-12T22:14:29.000Z</time><course>143.93993</course><speed>2.029855</speed><src>gps</src><sat>19</sat><hdop>0.616</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.20418340912657" lon="-1.5614913783283932"><ele>60.769500490278006</ele><time>2018-10-12T22:14:51.000Z</time><course>113.16143</course><speed>1.5904458</speed><src>gps</src><sat>19</sat><hdop>0.634</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.2040260176557" lon="-1.5609252708740888"><ele>55.63570551387966</ele><time>2018-10-12T22:15:14.000Z</time><course>91.62614</course><speed>2.1448538</speed><src>gps</src><sat>16</sat><hdop>0.715</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.205199349031055" lon="-1.5520433643283884"><ele>53.02610728237778</ele><time>2018-10-12T22:20:26.000Z</time><course>54.518406</course><speed>2.083961</speed><src>gps</src><sat>20</sat><hdop>0.609</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.2146453499986" lon="-1.5561459335476981"><ele>61.75346542429179</ele><time>2018-10-12T22:30:19.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>7</sat><hdop>1.432</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.214752089428686" lon="-1.5559505374909395"><ele>55.98913097754121</ele><time>2018-10-12T22:30:50.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>5</sat><hdop>1.828</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21697418457949" lon="-1.5586074166907542"><ele>219.44619236513972</ele><time>2018-10-12T22:35:45.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>10</sat><hdop>0.980</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.2180542943504" lon="-1.5573716684665466"><ele>250.6198966074735</ele><time>2018-10-12T22:36:13.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>7</sat><hdop>1.052</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21711030656585" lon="-1.5569471893946347"><ele>55.56338410079479</ele><time>2018-10-12T22:36:40.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>11</sat><hdop>0.892</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21699755108639" lon="-1.5567996060110567"><ele>41.776507526636124</ele><time>2018-10-12T22:37:07.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>9</sat><hdop>0.976</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21818594312145" lon="-1.5571219060853059"><ele>51.63474513310939</ele><time>2018-10-12T22:37:35.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>7</sat><hdop>1.417</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21716851800992" lon="-1.5566079297158075"><ele>86.04924862552434</ele><time>2018-10-12T22:38:05.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>9</sat><hdop>0.813</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21702047446489" lon="-1.5569418405441893"><ele>47.32080702576786</ele><time>2018-10-12T22:38:34.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>9</sat><hdop>1.176</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.216814377204415" lon="-1.5568751293920997"><ele>50.24347150698304</ele><time>2018-10-12T22:39:02.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>12</sat><hdop>0.974</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21714528397261" lon="-1.5572645622792702"><ele>-23.295903977937996</ele><time>2018-10-12T22:39:37.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>10</sat><hdop>1.329</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21699558042582" lon="-1.5568657744905592"><ele>53.54862023238093</ele><time>2018-10-12T22:40:10.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>12</sat><hdop>1.170</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21740080911752" lon="-1.5573737344760057"><ele>33.82174093555659</ele><time>2018-10-12T22:41:11.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>8</sat><hdop>1.144</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21707256149581" lon="-1.5570581967939203"><ele>38.57736684754491</ele><time>2018-10-12T22:41:43.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>9</sat><hdop>1.007</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.216835771005954" lon="-1.5572108524300152"><ele>46.88062702212483</ele><time>2018-10-12T22:42:45.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>10</sat><hdop>1.131</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21685875276186" lon="-1.556659323451939"><ele>33.95603013969958</ele><time>2018-10-12T22:43:15.000Z</time><course>80.40472</course><speed>0.0</speed><src>gps</src><sat>7</sat><hdop>1.417</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21692032324517" lon="-1.5567274269391531"><ele>33.83820783812553</ele><time>2018-10-12T22:44:00.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>9</sat><hdop>1.728</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21712837364016" lon="-1.557122784534594"><ele>98.43395509012043</ele><time>2018-10-12T22:44:30.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>10</sat><hdop>1.163</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.2171290956127" lon="-1.5568148326290927"><ele>81.43958742264658</ele><time>2018-10-12T22:44:59.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>8</sat><hdop>1.305</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21696114484847" lon="-1.5568913480828828"><ele>85.95698602218181</ele><time>2018-10-12T22:45:59.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>7</sat><hdop>1.605</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.21783450355703" lon="-1.5540710813533547"><ele>94.63379538897425</ele><time>2018-10-12T22:47:37.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>8</sat><hdop>1.603</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.218800264906626" lon="-1.5506279503387341"><ele>78.09365604817867</ele><time>2018-10-12T22:49:26.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>7</sat><hdop>1.999</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
<trkpt lat="47.247527254356015" lon="-1.5389095204687568"><ele>88.90477059688419</ele><time>2018-10-12T23:04:25.000Z</time><course>0.0</course><speed>0.0</speed><src>gps</src><sat>9</sat><hdop>1.521</hdop><ageofdgpsdata>0</ageofdgpsdata></trkpt>
</trkseg></trk></gpx>

```

 ![TESTxml](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/2X/6/6823f1762a8a4aee5e51cd929131e79a50da213f.png)

It should give you this result.

---

<div class="post-metadata">

**Author:** ![jeremydouglass](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/jeremydouglass/32/20_2.png) [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)\
**Post date:** [November 3, 2018, 4:08pm UTC](https://discourse.processing.org/t/load-several-xml-to-analyse-them/5058/4 "2018-11-03T16:08:01Z")

</div>

> [@Pr0tonX](#):
>
> I can’t upload an XML

Just highlight the code in your post and press the \</\> button to format it.

---

<div class="post-metadata">

**Author:** ![Pr0tonX](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/pr0tonx/32/2590_2.png) [@Pr0tonX](https://discourse.processing.org/u/Pr0tonX)\
**Post date:** [November 5, 2018, 9:14am UTC](https://discourse.processing.org/t/load-several-xml-to-analyse-them/5058/5 "2018-11-05T09:14:36Z")

</div>

It’s done in the previous done. There is all the data I use in my sketch with some banners useless inside, but it’s not important.  
I use only lat , lon and time for now

I thought that I can make an array instead of using my variable **xml** to put in all my xml and then call them one after to draw the journeys ; but an xml can’t be put in an aray…

---

<div class="post-metadata">

**Author:** ![kll](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/kll/32/964_2.png) [@kll](https://discourse.processing.org/u/kll)\
**Post date:** [November 5, 2018, 10:30am UTC](https://discourse.processing.org/t/load-several-xml-to-analyse-them/5058/6 "2018-11-05T10:30:03Z")

</div>

to find working range can use like

```auto
XML xml; //,xml1, xml2;
XML[] trackpoints; //,trackpoints1, trackpoints2;
String file1="trip1.xml";
String file2="trip2.xml";

double lat, lon;
double longMax=-300, longMin=+300, latMax=-300, latMin=+300; // some over range 

void setup() {

  load_file(file1);
  println("min max accumulated");
  load_file(file2);
// now you know your overall working range
// more of your code
}

void load_file(String file){
  xml = loadXML(file);
  trackpoints = xml.getChildren("trk")[0].getChildren("trkseg")[0].getChildren("trkpt");
  // check data
  for (int i = 0; i < trackpoints.length; i++) {
    lat = trackpoints[i].getDouble("lat");
    lon = trackpoints[i].getDouble("lon");
    minmax(lon, lat);
  }
  println("load "+file+" longMax "+longMax+" longMin "+longMin+" latMax "+latMax+" latMin "+latMin);
}

void minmax(double lon, double lat){
    if (lon>longMax) longMax = lon;
    if (lon<longMin) longMin = lon;
    if (lat>latMax) latMax = lat;
    if (lat<latMin) latMin = lat;
}

```

but that is working also if you use the  
,xml1, xml2;  
,trackpoints1, trackpoints2;  
and you have all data stored

---

<div class="post-metadata">

**Author:** ![Pr0tonX](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/pr0tonx/32/2590_2.png) [@Pr0tonX](https://discourse.processing.org/u/Pr0tonX)\
**Post date:** [November 9, 2018, 11:50pm UTC](https://discourse.processing.org/t/load-several-xml-to-analyse-them/5058/7 "2018-11-09T23:50:00Z")

</div>

Thanks for your help @kll

So I did two distincts programs finaly (only for visibility) ; the first for find working range for polar coordinates, and then I manually put them in the second which draws.

For the first, using @kll code :

```auto
XML xml;
XML[] trackpoints; //,trackpoints1, trackpoints2;
String xml1 = "2823479.xml";
String xml2 = "2823480.xml";
String xml3 = "2823481.xml";
String xml4 = "2823482.xml";
String xml5 = "2823483.xml";
String xml6 = "2823484.xml";
String xml7 = "2823485.xml";
String xml8 = "2823486.xml";
String xml9 = "2817909.xml";
String xml10= "2816774.xml";
double lat, lon;
double longMax=-3, longMin=0, latMax=-3, latMin=50;
int Time;
int time2;
int[] time_spent;
String[] tstamp;
int minTime_spent; 
int maxTime_spent;

void setup() {

  // to know overall working range
  load_file(xml1);
  load_file(xml2);
  load_file(xml3);
  load_file(xml4);
  load_file(xml5);
  load_file(xml6);
  load_file(xml7);
  load_file(xml8);
  load_file(xml9);
  load_file(xml10);

  println("LongMax =", longMax, " Longmin=", longMin, " Latmax=", latMax, " latMin=", latMin);
  println("time_spentMin= ", minTime_spent, " maxtimespent = ", maxTime_spent);
}

void load_file(String file) {
  xml = loadXML(file);
  trackpoints = xml.getChildren("trk")[0].getChildren("trkseg")[0].getChildren("trkpt");
  time_spent = new int[trackpoints.length];
  // check data
  for (int i = 0; i < trackpoints.length; i++) {
    //gps data
    lat = trackpoints[i].getDouble("lat");
    lon = trackpoints[i].getDouble("lon");

    //time data
     String t = trackpoints[i].getChildren("time")[0].getContent();
    tstamp = t.split("T")[1].split("\\.")[0].split(":"); //get only the time
    Time = int(tstamp[0])*3600 + int(tstamp[1])*60 + int(tstamp[2]); // valeur de time unique, unique value of time in sec
    time_spent[i] = Time-time2; // time spent between 2 points
    time2 = Time; // value n-1 of Time
  }
  minmax(lon, lat);
  println("load "+file+" longMax "+longMax+" longMin "+longMin+" latMax "+latMax+" latMin "+latMin);
}

//to find min/max
void minmax(double lon, double lat) {
  //gps data
  if (lon>longMax) longMax = lon;
  if (lon<longMin) longMin = lon;
  if (lat>latMax) latMax = lat;
  if (lat<latMin) latMin = lat;

  //time data
  for (int i =0; i < trackpoints.length; i++ ) {
    if (time_spent[i] > maxTime_spent) {
      maxTime_spent = time_spent[i];
    }
    if (time_spent[i] < minTime_spent) {
      minTime_spent = time_spent[i];
    }
  }
}

void draw() {
}

```

And then I draw in the second. I had to use arrays of double for store gps data, and because I had an error of OutOfBounds, I finally use a class (and receive some exterior help at this time) :

```auto
// un classe qui stocke juste des valeurs
class Data {
  double lat;
  double lon;
  int time_spent;

  Data(double lat, double lon, int time_spent) {
    this.lat = lat;
    this.lon = lon;
    this.time_spent = time_spent;

```

wich is used in my function load\_file to store my data.

```auto
    Data d = new Data(lat, lon, Time-time2);
    datas.add(d); // je l'ajoute à mon arrayList

```

It permits to display all my journeys I load in my sketch. It only remains to the final graphic aspect of my drawings. But the code is functional. I quickly cleaned up all the code I put in comment but there still are probably some useless lines…

```auto
XML xml;
XML[] trackpoints;
double[] everyLat ={};
double[] everyLon = new double[0] ;
int indexTrackpoints;
double lat; 
double lon;
float latitude1; 
float longitude1;
float latitude; 
float longitude;
float taille;
int Time;
int time2;
int[] time_spent ={};
String[] tstamp;
int minTime_spent; 
int maxTime_spent;
double longMax; 
double longMin;
double latMin;
double latMax;
String xml1 = "2823479.xml";
String xml2 = "2823480.xml";
String xml3 = "2823481.xml";
String xml4 = "2823482.xml";
String xml5 = "2823483.xml";
String xml6 = "2823484.xml";
String xml7 = "2823485.xml";
String xml8 = "2823486.xml";
String xml9 = "2817909.xml";
String xml10= "2816774.xml";

// un arrayList qui stocke toutes nos données
ArrayList <Data> datas = new ArrayList();

void setup() {
  size(1350, 850);
  // xml = loadXML("2823479.xml");//loadXML("2823482.xml");//,loadXML("2823483.xml");,loadXML("2823484.xml"),loadXML("2823485.xml"),loadXML("2823486.xml");
  //loadXML("2823480.xml");//
  // trackpoints = xml.getChildren("trk")[0].getChildren("trkseg")[0].getChildren("trkpt");
  longMax =-1.5182774066925049 ; // trackpoints[0].getDouble("lon");
  longMin= -1.5762523603616678; //trackpoints[0].getDouble("lon");
  latMax = 47.28255081176758 ; //trackpoints[0].getDouble("lat");
  latMin = 47.17566217418081 ; // trackpoints[0].getDouble("lat");
  minTime_spent = -48248;
  maxTime_spent = 79288;
  indexTrackpoints = 0;

  // time_spent = new float[trackpoints.length];
  /* Time = float(tstamp[0])*3600 + float(tstamp[1])*60 + float(tstamp[2]);
   time2 = float(tstamp[0])*3600 + float(tstamp[1])*60 + float(tstamp[2]);*/

  // to know gps data & time_spent 
  load_file(xml1);
  load_file(xml2);
  load_file(xml3);
  load_file(xml4);
  load_file(xml5);
  load_file(xml6);
  load_file(xml7);
  load_file(xml8);
  load_file(xml9);
  load_file(xml10);

  // verify data size
  println(datas.size());
}//setup

//store all gps from xml(s) in an array & time_spent in another
void load_file(String file) {
  xml = loadXML(file);
  trackpoints = xml.getChildren("trk")[0].getChildren("trkseg")[0].getChildren("trkpt");

  for (int i = 0; i < trackpoints.length; i++) {
    //gps storage
    lat = trackpoints[i].getDouble("lat");
    lon = trackpoints[i].getDouble("lon");

    
    //time storage
    String t = trackpoints[0].getChildren("time")[0].getContent();
    tstamp = t.split("T")[1].split("\\.")[0].split(":");
    Time = int(tstamp[0])*3600 + int(tstamp[1])*60 + int(tstamp[2]); // valeur de time unique, unique value of time in sec
    //append(time_spent, Time-time2); // time spent between 2 points
    
    //create data object w/ data collected in xml files
    // Je créée un objet data avec les données récoltées dans les fichiers xml
    Data d = new Data(lat, lon, Time-time2);
    datas.add(d); // add to my arrayList
   
    time2 = Time; // value n-1 of Time
  }
}

void draw() {
  pushMatrix();

  for (int i = 0; i < datas.size(); i++) { // on itère sur l'arraylist
  
    Data d = datas.get(i); // on récupère l'objet stocké à l'index i de l'arraylist
    
    // on récupère les données stockées dans l'objet "d"
    lat = d.lat;
    lon = d.lon;
    taille = map(d.time_spent, minTime_spent, maxTime_spent, 1, 13);

    latitude = map((float)lat, (float)latMin, (float)latMax, 50, width-50); //convert into the scale of the window
    longitude = map((float)lon, (float)longMin, (float)longMax, 30, height-30);

    //get together points that they're near 
    if ((abs(latitude1-latitude)<15) && (abs(longitude1-longitude)<15)) {
      latitude = latitude1;
      longitude =longitude1;
    }

    //draw
    stroke(120, 20, 0);
    strokeWeight(taille); //weight depends on time past
    line(latitude1, longitude1, latitude, longitude);
    ellipse(latitude, longitude, taille, taille);
    latitude1 = latitude ;
    longitude1 = longitude;
  }

  popMatrix();
  saveFrame("TESTxml.png");
}

// class wich store data 
class Data {
  double lat;
  double lon;
  int time_spent;

  Data(double lat, double lon, int time_spent) {
    this.lat = lat;
    this.lon = lon;
    this.time_spent = time_spent;
  }
}

```