B4J Question Geo-code question - how do I...

May be like this:
- make 3 lists for each truck, holding time,lat and long.
- separate to two groups - one going north direction and the other going south.
Algorithm:
- for each truck in group A do:
... - for each truck in group B do:
...... - find time-overlapping sequences and mark the start index in one list and the end index in the other
...... - if there is overlap then:
......... - Check the range between the trucks for the first overlapping time
......... - start loop
............ - jump forward in time(the index) (create some relation between the range and the expected meeting time and make the jump smaller so not to jump over the meeting time)
............ - starting at certain small range - check one by one until range get larger and
.................log that time as meeting and exit this B truck
......... end loop
......-end if
... -next
-next

The formula for expected meeting by range is
time jump to meet = 0.5 * range / mean speed, so take less than that in order to check again before. You have to use the correct set of units(e.g. meter-sec)

As I am pondering this problem...

It is multi-step. I do not think it can be accomplished in a single pass. WAY beyond what I have ever tried to accomplish... but here I go...
After all, it's only math and MUCH logic. Hopefully you smart folks can help contribute to this logic...
Otherwise, if not, it helps ME conceptualize and lay it out - as best I can - hoping to gain (get) insight.

Currently:
I have created and use Geo-Zones in my app for real time processing on the device. It will determine if speed is above set param while in this geo-zone (see pic above) - and create a record if it is... (reports speed violations - this zone is 30 MPH).

I am thinking, if I geo-zone the entire road (all 52 miles), in, let's say, 2 mile zones (26 in all)... I can then build a result set (for a 24 hour period - or whatever) that would tell me what vehicles were in each zone at every hour of the given day. Now I have a result set that tells me vehicles A,B,C were in Zone 1 between 8 - 9 am.
From this, were any of these vehicles AT the SAME lat/lon during this 1 hour time frame (give or take x seconds)? And, during this "meeting" was either vehicles speed > than "x"?

Why I ponder this at 11:55 pm (5 mins before 2017 - BC, Canada time) - is beyond me...
Anyway - HAPPY NEW YEAR!

derez said:

May be like this:
- make 3 lists for each truck, holding time,lat and long.
- separate to two groups - one going north direction and the other going south.
Algorithm:
- for each truck in group A do:
... - for each truck in group B do:
...... - find time-overlapping sequences and mark the start index in one list and the end index in the other
...... - if there is overlap then:
......... - Check the range between the trucks for the first overlapping time
......... - start loop
............ - jump forward in time(the index) (create some relation between the range and the expected meeting time and make the jump smaller so not to jump over the meeting time)
............ - starting at certain small range - check one by one until range get larger and
.................log that time as meeting and exit this B truck
......... end loop
......-end if
... -next
-next

The formula for expected meeting by range is
time jump to meet = 0.5 * range / mean speed, so take less than that in order to check again before. You have to use the correct set of units(e.g. meter-sec)

Click to expand...

While I was writing my own retort - you responded... Thanks @derez... Shall take it up in the am.. Time to DRINK and be merry! it is 2017!!!!!!