EDDN/schemas/approachsettlement-README.md

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# EDDN ApproachSettlement Schema
## Introduction
Here we document how to take data from an ED `ApproachSettlement` Journal
Event and properly structure it for sending to EDDN.
Please consult [EDDN Schemas README](./README-EDDN-schemas.md) for general
documentation for a schema such as this.
If you find any discrepancies between what this document says and what is
defined in the relevant Schema file, then you should, in the first instance,
assume that it is the Schema file that is correct.
**PLEASE open
[an issue on GitHub](https://github.com/EDCD/EDDN/issues/new/choose)
to report any such anomalies you find so that we can check and resolve the
discrepancy.**
## Senders
The primary data source for this schema is the ED Journal event
`ApproachSettlement`.
### MarketID
Whilst the `MarketID` property is not in the required list **YOU MUST
ABSOLUTELY SEND THIS WHEN IT IS PRESENT IN THE SOURCE DATA**.
The only reason it is optional is that there are `ApproachSettlement`
Journal events for things like visitor beacons that do not have a market, and
thus no MarketID.
Examples:
```json
{
"timestamp":"2022-02-18T14:33:35Z",
"event":"ApproachSettlement",
"Name":"Battlegroup's Disappearance",
"SystemAddress":1109989017963,
"BodyID":8,
"BodyName":"Alioth 1 a",
"Latitude":59.972752,
"Longitude":-84.506294
},
{
"timestamp": "2022-02-18T15:02:04Z",
"event": "ApproachSettlement",
"Name": "$Ancient:#index=1;",
"Name_Localised": "Ancient Ruins (1)",
"SystemAddress": 3515254557027,
"BodyID": 13,
"BodyName": "Synuefe XR-H d11-102 1 b",
"Latitude": -46.576923,
"Longitude": 133.985107
},
```
### Augmentations
#### horizons and odyssey flags
Please read [horizons and odyssey flags](../docs/Developers.md#horizons-and-odyssey-flags)
in the Developers' documentation.
#### StarSystem
You MUST add a StarSystem key/value pair representing the name of the system
this event occurred in. Source this from either Location, FSDJump or
CarrierJump as appropriate.
**You MUST apply a location cross-check, as per
[Other data augmentations](../docs/Developers.md#other-data-augmentations).**
#### StarPos
You MUST add a `StarPos` array containing the system co-ordinates from the
last `FSDJump`, `CarrierJump`, or `Location` event.
**You MUST apply a location cross-check, as per
[Other data augmentations](../docs/Developers.md#other-data-augmentations).**