---
title: "Create all passed in landmarks along with a set of groups in one go."
method: POST
path: "http://localhost:8000/{project_id}/landmarks/groups/materialize"
tags: ["landmarks"]
---

# Create all passed in landmarks along with a set of groups in one go.

`POST http://localhost:8000/{project_id}/landmarks/groups/materialize`

Create all passed in landmarks along with a set of groups in one go.

The format for the passed in landmarks is expected to be [name, x1, y1,
z1, x2, y2, z2], representing a shared landmark at locations (x1, y1,
z1) for group A and (x2, y2, z2) for group B.

The format for the optionally passed in links is: [group_name_1,
relation_name, group_name_2] elements, representing a relation between
two groups. Whether group A and B map to 1 and 2 or vice versa depends
on the semantics of the relation.

## Path parameters

- `project_id` string, required

## Response `201`

Created

## Changes

- **2020-06-24** `80927abb02ba` — 1 info
  - endpoint added
- **2019-08-15** `2b6c094737cc` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/catmaid/apis/catmaid-api/changes/http:/localhost:8000/:project_id/landmarks/groups/materialize/post.md)

---

[API](https://skmtc.dev/catmaid/apis/catmaid-api.md) · [All operations](https://skmtc.dev/catmaid/apis/catmaid-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/catmaid/catmaid-api/revisions/adc1c7c5eefe/schema)