---
title: "Polygon shape as it stood at a past instant"
method: GET
path: "/api/admin/library/polygons/{polygon_id}/geometry-at"
tags: ["polygon-library"]
---

# Polygon shape as it stood at a past instant

`GET /api/admin/library/polygons/{polygon_id}/geometry-at`

## Request

- Base URL: `https://grandline.luzomi.com`
- URL: `https://grandline.luzomi.com/api/admin/library/polygons/{polygon_id}/geometry-at`
- Auth: none declared

Backs retrospective AIS analysis (Agreement-Log task #22): match a ping
against the boundary that was in effect when the ping was recorded.

## Path parameters

- `polygon_id` integer, required

## Query parameters

- `at` string, date-time, required: ISO8601 instant

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/luzomi/apis/grandline-api.md) · [All operations](https://skmtc.dev/luzomi/apis/grandline-api/llms.txt) · [OpenAPI document](https://skmtc.dev/luzomi/apis/grandline-api/revisions/4ce06aea012b?raw)