# Local Space Influence Zone

`POST https://api.astroway.info/v1/local-space/influence-zone`

Calculate the local space influence zone lines for a chart relocated to a specific city: lines on the map showing planet directions from that location.

Group: Astro-Geography. Auth: `X-Api-Key` header. Operation ID: `local-space_influence-zone`.

## Parameters

| Name | In | Required | Type | Description |
|---|---|---|---|---|
| `fields` | query | no | string | Comma-separated dotted paths, relative to `data`, to keep in the response. A path is applied to every element of an array, so `planets.name` means the name of each planet. Paths that match nothing come back in `_fields_unmatched`; a list where nothing matches at all is a 400, because an empty object would be a confident wrong answer. |
| `precision` | query | no | integer | Round every non-integer number in the response to this many decimal places. Integers are left alone, because an id is not a measurement. Ecliptic longitudes ship with fourteen decimals by default; 2 is about a tenth of an arcminute. |

## Request body

| Field | Type | Required | Description |
|---|---|---|---|
| `latitude` | number | yes |  |
| `longitude` | number | yes |  |
| `azimuth` | number | yes |  |
| `halfAngle` | number | no |  |
| `maxDistDeg` | number | no |  |

```json
{
  "latitude": 50.45,
  "longitude": 30.52,
  "azimuth": 90,
  "halfAngle": 4
}
```

## Responses

| Status | Meaning |
|---|---|
| 200 | Successful calculation |
| 400 | Validation error |
| 401 | Missing or invalid API key |

### Success fields, under `data`

| Field | Type | Required | Description |
|---|---|---|---|
| `polygon` | object[] | no |  |
| `count` | number | no |  |

## Example

```bash
curl -X POST https://api.astroway.info/v1/local-space/influence-zone \
  -H "X-Api-Key: aw_live_..." \
  -H "Content-Type: application/json" \
  -d '{ "latitude": 50.45, "longitude": 30.52, "azimuth": 90, "halfAngle": 4 }'
```

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Rendered from https://api.astroway.info/v1/openapi.json. HTML page: https://api.astroway.info/docs/api/operations/local-space_influence-zone/