ECEF path generator

This is an application that generates ECEF coordinates from a drawn path on a map. The data generated can be used to generate GPS signal files for applications that simulate GPS signal gps-sdr-sim.

Demo

Working demo

Quick start:

• Click Settings, input the desire latitude and longitude where the map will be centered. Also the colours for the trail and mover can be customized.

• Over the map, draw a path using the mouse while pressing the left button, if it is needed you can delete the last points drawn with the button Remove.

• Adjust the initial speed:

  • key W increment speed by 5km and Q decrement it by 5km,
  • key S increment speed by 2km and A decrement it by 2km,
  • key X increment speed by 1km and Z decrement it by 1km,
  • right arrow increment speed by 0.5km and left arrow decrement it by 0.5km,

• Adjust the altitude with up arrow (increment) and down arrow (decrement), altitued is in meters.

• Adjust the initial time elapsed. At x1 this means that the mover will take 15 seconds on a 1 kilometre path at 240 km/hr, at x2 it will take 7.5 (of real time), at x4 3.75 sec (of real time) and so on. This will not affect the recording.

• Click "Recorder / Player", click Record, a blue point will start moving along the drawn path. You can modify the speed as you wish.

• After finishes the recording, you can see the result by pressing the Play button.

• Zoom can be adjusted at any time.

Documentation

• Recorder / Player

  • Record starts to record the position and speed of the mover. Once the recording has finished, speed can not be change. However it can be reset.
  • Reset reset the path ready to be recorded again from the beginning. Speed is override.
  • Delete delete the current path.
  • Remove as far as the path have not been recorded, clicking remove will remove the last point of the path, click it as needed to remove the many point.

• More Actions

  • Settings here you can set the latitude, longitude, altitude, zoom and colour for the path and mover.
  • Export to ECEF after recording, you can download the path in ECEF coordinates, you will need to input the frequency in Hertz for the sample data. To use with gps-sdr-sim the sampling rate of the user motion has to be 10Hz.
  • Download data this allows you to download the raw data a path was recorded, so you can import it later to play it, reset and change the speed and generate a different ECEF coordinate file.