What does the site exactly do again?
Ask commanders to enter distances from one system to another, to calculate or verify the coordiantes of systems.
-I tried to look up distances between two systems....couldn't do so...
This is not the main purpose of the EDSM web site. Anyway you can check the coordinates of every system (if coordiantes are known) and calculate the distance on your own. It would be a trivial task to enter two system names and calculate the distance, but primaly this would be the task of some route planning software, not EDSM.
-I tried to look for a map showing systems...couldn't find it...
Look at your travel map, there you can see your journey in 3D. But I suppose this is not what you're looking for. Can you describe a bit more?
-I tried to see what others have submitted, someone's log, to have an idea if probably my lack of data was the problem...couldn't find an example...
Look at
my profile, maybe take a look at my
Travel Map.
I still don't know what you're looking for.
SO...all these distances submitted, are being used for???
Either confirm the position/coordinates of a known system or calculate the position of a system with unknown coordinates. Not more, and not less. FD gave us the coordinates of a bit less than 20k systems at the beginning, and we're collecting distances to unknown systems, to calculate the coordinates.
Honest question!! I feel like I just misunderstood the site or didn't used it correctly and would like to help and add my data, as long as I understand what are we trying to do here!
Basically: If you arrive in a system with unknown coordinates - displayed with blue system name in EDDiscovery, or EDSM web site says "No coordinates known, please enter some reference distances." - check distances to known reference systems in the galaxy map and enter/submit them, until the coordinates can be calculated.
If you are in a system with known coordinates - EDDiscovery system name black, EDSM web site says "That system has known coordinates! It is located at 123.45..." you
may check the "Check suspicious distances" or the "Needed distances" tabs. First is to show suspicious and probably wrong distances submitted from some CMDR before. These are distances between systems with known coordinates, but the calculated distance doesn't match the submitted distance. And there are different distances submitted from system A to B, but only one of them is correct.
The "Needed distances" tab asks you to confirm distances from system A to B, where both positions are known. If we get 8 distances from angles more than 15 deg (AFAIR) we consider the coordinates as "good", and no more distances are requested.
And it asks to enter distances from A to B, where the position of B is unknown, to calculate the position of B.
I'm unsure if my explanation was understandable, because from time to time I sink into formulas and mathematics, and algorithms... Feel free to ask...