BasicAirData GPS Logger

Getting Started

GPS Logger is a simple App for taking track of your position and your path. You can record your trips, annotate your placemarks along the way, view your position, speed, altitude, direction, and many statistics about your trips. You can access anytime to your recorded tracks using the in-app Tracklist, view them with Google Earth (if installed) or with your preferred viewer in one click, save and share them in GPX, KML, and TXT format.

It’s an essential, and lightweight GPS tracker focused on accuracy, with an eye to power saving.

Basic Usage

If the GPS location is not active on your phone, activate it. Then go in an open area and start GPS Logger;

  1. Wait until the app finds the Fix. When available, the “GPS FIX” tab will show the coordinates of the Fix;
  2. Click on the “Trackpoints” button of the bottom panel to start recording track points. The button will become red. You can anytime toggle on/off the recording process by clicking on that button. The button shows the amount of the track points recorded.
    Go for a ride! Don’t forget your smartphone :P.
    You can go to the “TRACK” tab to view in real time the statistics of your trip;
  3. When your trip is finished, double-tap on the little “V tick” located near the upper right corner to finalize (finish) the active track;
  4. Go to the “TRACKLIST” tab, where you will find the track you have just recorded. Tap on the track. A menu will appear. You can choose to share the track in many ways, view it using an installed external viewer, export it into /GPSLogger folder of your smartphone, or delete it from the tracklist.

Application Tour

Main Activity

  • Finish button: the little V tick appears on top toolbar when you record a track. Double-tap on it to finalize (finish) the currently active track and get ready for the next one.
  • Main menu: click on the upper right 3 dots to open the main menu. You can access from here to the settings and the about screen. Here you can also shut down the app.
  • Main area: this is the main swipeable area. The first tab shows the GPS FIX, the second one (TRACK) shows the current active Track statistics, and the third one (TRACKLIST) shows the list of the recorded tracks.
  • Bottom bar: it contains two buttons; The right one (Trackpoints) toggles the recording on and off; the left one (Placemarks) adds a placemark (annotation).

Settings Screen

  • INTERFACE: General visualization settings.
    • Keep Screen On: when this option is active, the screen will always remain active when the main activity is in the foreground.
    • Show Decimal Coords: it is possible to switch between decimal and Degree/Minutes/Seconds notation for coordinates (only for visualization purpose).
    • Show Directions using: you can choose to show directions using N E S W cardinal points or the clockwise degrees (degrees east) referred to North.
    • Track Statistics based on: you can choose to base the statistics of the currently active track on the total time or on the total movement time.
  • TRACKING: Various real-time settings of the recording process
    • Collecting Density: you can choose here the distance between two contiguous recorded points. Set it to “Maximum” to record every Fix.
    • GPS Update Frequency: specify the time between fixes, only for battery saving purpose. In several Android devices this setting is a suggested interval (and not mandatory) due to operating system specifications, thus the time between the fixes could be different to the set one.
  • ALTITUDE CORRECTIONS: A special section dedicated to Altitudes. It’s fundamental to remember that all altitude corrections are applied in real-time (on-the-fly) to all altitudes in visualization and exportation phase. During acquisition, the app will always record the raw data. Thus you can anytime activate/deactivate altitude corrections without corrupt or change any recorded data.
    • EGM96 Correction: The GPS gives an altitude referred to an approximated Earth surface (called Ellipsoid). Enabling this setting, the app allows for an automatic altitude correction based on NGA Earth Geoid Model, to compute the real altitude referred to the sea level (Real Earth Geoid). The first time you activate this option, the app will download the EGM grid from the NGA/NASA website (a 2MB file) and saves it into a private folder. That is a one-time operation; no further connection is needed to keep the correction enabled.
    • Manual Correction: you can specify an overall altitude offset. The offset is applied on-the-fly too.
  • EXPORTATION: Output formats (for Share and Export).
    • Export Tracks in TXT: enable it to share/export tracks in Plain Text, comma separated value. This format is easily openable with any spreadsheet, and it is a useful format because it contains all recorded data of every fix.
    • Export Tracks in GPX: enable it to share/export tracks in Standard GPS eXchange Format. This format is the standard for OpenStreetMap and a lot of web service with statistic purpose. It is quite complete because it contains much data of every fix (cords, speed, timestamp, altitude, satellites used in fix…); thus it will be possible to have a complete track statistics.
    • The version of GPX standard: you can choose between the v.1.0 and the v.1.1. Usually, the v.1.0 is the most compatible (especially for old third-party software), but some others (like, for example, Garmin Connect) supports the v.1.1 only.
    • Export Tracks in KML: enable it to share/export tracks in Google Keyhole Markup Language (v.2.2). This format is the standard for Google Earth and Maps. It is the less informative format because it only contains coordinates and altitude. Thus, no way to rebuild any statistics using it.
    • KML Altitude mode: in KML it is possible to view the track Projected to the ground or in real 3D (absolute). It is visible for example in Google Earth.

Frequently Asked Questions

Q – I’ve just installed the app, but it doesn’t read the GPS signal.
A – Please try to reboot your device. Check also that the GPS signal is strong enough and, if not, go in an open area.

Q – The location is active, but the app sees “GPS disabled”.
A – Please go on Location section of your Android settings: the phone could be set to use the “Battery saving” Locating method. This method uses Wi-Fi & mobile networks to estimate your location, without turn on the GPS. In case please switch to “Phone only” or “High accuracy” method to enable the GPS sensor.

Q – The “View,” “Export,” and “Share” menus are grayed out.
A – Please check in Android System settings that GPS Logger has the Storage permission granted.

Q – How can I see my recorded tracks?
A – You can see your tracks clicking on it and using the “View in…” contextual menu. A KML viewer must be installed on your device; if not, please install it. One of the best KML viewers is Google Earth, but there are lots of good alternatives around.

Q – My track is not shown (or partially shown) in Google Earth.
A – 1) Please check in Android System settings that Earth has Storage permission granted; 2) GPS Logger might be set to show the track in 3D, and the track may be hidden under the terrain. Please go to the Exportation settings, switch the Altitude Mode to “Projected to the ground” and try again.

Q – My Google Earth occasionally shows a black screen instead of my track.
A – It is a Google Earth 8 related issue. When the problem occurs, please click on the small bearing located in the upper-right corner of the Earth map.

Q – The app sometimes stops recording when running in background.
A – The app could be closed by the system during the background recording. To avoid it, you can go on the device maintenance section of your android settings, select the battery sub-section, and add GPS Logger to the list of unmonitored apps. Furthermore, anti-viruses (like Avast) are very aggressive with long running apps, and must be correctly set.