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Tag View

Tag View is a new build of SensorViz. It opens the same SQLite logs and draws the same plot: the same streams, derived views, colors, axes, cursors and zoom, from the same code. Its menus are SensorViz's, and its preference files are the same files, so a file stored by one loads in the other. Everything on the SensorViz page applies; this page lists only what differs. Help ▸ Tag View User Guide opens this page.

The two programs are installed side by side, as sensorviz and tagview.

Tag View showing an IMUTag log

Before You Start

  • On Linux, Tag View needs WebKitGTK 4.1, which GNOME desktops already have. Elsewhere install it once, for example sudo apt install libwebkit2gtk-4.1-0 on Ubuntu or Debian. Windows 10 and 11 and macOS need nothing extra.
  • Tag View only reads log files. It never connects to a tag or a base.
  • A log can be named when Tag View is started from a terminal, with a preference file to load: tagview flight.db3 --load-preferences my-preferences.json.

What Is Different

  • Export PDF instead of Print. File ▸ Export PDF… saves the plot as it is on screen, with its title, legend and metadata box, as a PDF page you can print or share. There is no print preview.

  • Auto-ranged axes fit the data. An axis with no range of its own spans the visible data with a small margin. In SensorViz such an axis also keeps zero in view, so a trace such as altitude can sit in a thin band of a tall axis; in Tag View it fills the axis.

  • No activity filter. Configuration ▸ Activity Filter is not in Tag View. The activity stream itself is plotted as in SensorViz; use SensorViz for the filtered view.

  • Visible Streams lists each magnitude first, with its X, Y and Z channels indented beneath it.

    The Visible Streams dialog

  • Axis Sides lists each stream, rather than each shared axis. Streams that share an axis move together.

  • The time axis title is on one line.

CompassTag Logs

For a CompassTag log with raw compass samples, Tag View shows the compass panel beside the plot, as SensorViz does: the heading dial, the sensor readings and the declination and battery direction. It shows the sample at the cursor as you move over the plot.

Tag View showing a CompassTag log

Report anything else that behaves differently: the two are meant to agree.