---
title: "MapPart"
description: "one part of the map: measured, under test or never read, and never two"
section: concepts
address: /concepts/mappart
contract: 0476e35e6e275db5
---

# MapPart

one part of the map: measured, under test or never read, and never two

[figure: MapPart is a value at none scope. The drawing shows its fields and the objects that they point at.]

| property | value |
|---|---|
| kind | value |
| scope | none |
| key | none |
| store | none |
| family | market |



## Fields


| field | type | required | note |
|---|---|---|---|
| `name` | `text` | yes |  |
| `units` | `[id]` | yes |  |
| `position` | `one of measured \| under test \| never read` | yes |  |
| `coverage` | [CoverageReading](/concepts/coveragereading) | yes |  |
| `not_ready` | `[id]` | yes | the units of this part that are visibly not ready, a subset of units; a part whose units carry no readiness lists none |



## Routes that use it
No route takes or returns MapPart directly. The record holds it, and the objects that point at it reach it.