TGC - The Great Collector


Abandonned / No longer updated
With an API
Compatible with release
Supported languages
English en
WebApplication Web application
Elite:Dangerous Application


TGC is a web-api for retrieving Systems and Distances information and for submitting Distances. TGC calculates 3D coordinates for a system.

TGC was developed for the crowd sourcing project of calculating 3D coordinates. Thread: What is the most efficient way to crowdsource the 3D system coordinates. The authors hasn't created its own thread yet, but its discussed and questions can be asked in that thread.


The 3D coordinates of a star sytem X can be calculated by a process called Trilateration. As input, the distances from system X to other  (good reference) star systems are used. In an ideal world 4 would suffice but in practise 5 or more are used. After the precision in the Galaxy map was reduced from 3 to 2 decimals (the navigation menu was always 2 decimals) the work got a lot harder - precision is key. Other commanders came up with different 'needle/plane' techniques to overcome this limitation. A whole LOT of effort has gone into those algorithms. Admin note: Not 100% sure which method or a combination of methods TGC is using, but it works.


Commanders can upload distances to TGC using a large variety of tools - see API section at the bottom of the page. When enough (good) distances are present TGC is able to calculate the 3D coordinates for a system. The tool which is created and used by the author is EDSC.

Note: The author already had a domain for EDSC. For various reason he decided to reuse the domain for TGC. Hence confusion. The tool is mostly called TGC in the 3D coordinates thread. Outside of it its often incorrectly referred to as EDSC.


Update: The site and code is not updated since the 16th of December and the author has not posted since then (there). Issues have surfaced and a new tool has emerged, called EDSM. Which is an acronym for Elite Dangerous Star Map. EDSM is on an API level compatible with TGC but offers more funcitonality and API calls. Its also very actively updated. Authors of tools using TGC are very much encouraged to switch to EDSM.




  • Jun 30, 2022 (Dave247) Updated Frontier profile URL & marked as abandoned
  • Sep 27, 2015 (wolverine2710) Some small changes to the full desc.
  • Sep 27, 2015 (wolverine2710) Largely rewritten the full desc.
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  • Sep 26, 2015 (wolverine2710) Edited full desc.: Made clear that TGC and EDSC are two different tools - which work together.
  • Sep 26, 2015 (wolverine2710) Changed full desc.: Mentioned that EDSM is on an API level compatibe with TGC.
  • Sep 26, 2015 (wolverine2710) Changed short desc.
  • Sep 26, 2015 (wolverine2710) Changed "with an API " field. Now shows the three API calls.
  • Sep 26, 2015 (wolverine2710) Changed name for website url for the TGC API. Changed from "TGC aka EDSC" into "TGC API". Added picture + caption for TGC API page
  • Sep 26, 2015 (wolverine2710) Changed title from "TGC aka EDSC" into "TGC - The Great Collector". The atuhor asked to split it up as it are really 2 different tools - TGC and EDSC.
  • Aug 4, 2015 (wolverine2710) Set platform: Web-application
  • Jul 4, 2015 (wolverine2710) Added category "coords". Added "uses as existing API" - ed-systems. Edit field "describe your API"
  • Jul 3, 2015 (wolverine2710) Changed full description. Changed Elite Dangerous Star Mapper into ED Star Map
  • Jul 3, 2015 (wolverine2710) Changed short and full description. Explained why its known under two names: TGC and EDSC
  • Jul 2, 2015 (biobob) Add API infos


API calls: GetSystems, GetDistances, SubmitDistances

Tools using the API

API used by this tool