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Introduction

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Track Query

This query filters tracks through every possible variation, in order to select and display a specific quota of tracks (within the time period and record limitations). The track pathways appear as a white line on the PPI, but multiple tracks can be multi-coloured to differentiate them. The variables are decided by the following categories: 

  1. Min. Sightings: minimum number of sightings a track requires before it is recorded as a track. 
  2. Min. Speed: the speed value, either a maximum, minimum or equal to value.
  3. Classification: type of moving object.

  4. Travelled (m): how far along the carriageway the tracks have travelled. Toggle the 🛇, ≤ and ≥ buttons to define the value.

  5. Area Covered (m): how far the track has travelled, either horizontally or vertically along the x/y-axis. Toggle the 🛇, ≤ and ≥ buttons to define the value. Whether the value is measured on the x or y-axis depends on which is the larger 'distance'. In the examples below, the Area Covered is defined first by the distance travelled along the x-axis, and second by the distance travelled up the y-axis.

    For distance Travelled, it is a minimum value. The results will return tracks any value larger, any values further from zero, whether negative or positive. e.g. Travelled (m): 6 would return 7, 8, 9... and - 6 would return - 7, - 8, - 9...
    For Area Covered, it is a maximum value. The results will return tracks of every distance value between a positive, or negative, value and zero. e.g. Area Covered (m): 6 would return 5, 4, 3... and - 6 would return - 5, - 4, - 3..

  6. Lost: 
  7. Areas:
  8. Rules: you may select multiple rules to query at once. 
    1. Person Rule
    2. Slow Vehicle Rule
    3. Reversing Vehicle Rule
    4. Debris Rule
    5. Stopped Vehicle Rule
  9. Radars:
  10. Analysis Status:
  11. Results: how many results the query has returned.


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