# Glossary

#### :bust\_in\_silhouette: **Account** <a href="#account" id="account"></a>

To use Ellipsis Drive, a user must have an account. An Ellipsis Drive account provides a workspace for storing, managing, and sharing spatial data.

#### :globe\_with\_meridians: Data

Ellipsis Drive supports any type of spatial data, including raster data, vector data, and point cloud data. Raster, vector, and point cloud refer to different types of spatial data used within the platform. Ellipsis Drive uses these data types to represent datasets provided by users or connected systems.

#### :map: Paths and layers

Any item in Ellipsis Drive is referred to as a **path**. A path can be a **folder**, **file**, **bookmark**, or **layer**. Folders and files behave similarly to a standard file system. Layers in Ellipsis Drive are containers for spatial data. These layers can be of type raster, vector, or point cloud.

| Term             | Definition                              |
| ---------------- | --------------------------------------- |
| **Raster Layer** | A layer used to store raster data.      |
| **Vector Layer** | A layer used to store vector data.      |
| **Point cloud**  | A layer used to store point cloud data. |

#### Bookmark

A bookmark is a reference to a view in the Ellipsis Drive viewer in which one or more layers are loaded with a specific style and viewport.

Bookmarks represent saved views composed of layers.

#### Vector Layer

A vector layer is a layer used to store vector data. Vector layers consist of features.

Vector layers can have one or multiple styles.

| Term            | Definition                                                                                                                                                                                                                                                                                                                                |
| --------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Feature**     | <p>A feature represents a real-world object on a map. Features contain geometry and properties. Geometry defines spatial location, while properties contain non-spatial information.<br></p><p>Features can have multiple versions. Users can attach time series and messages to features. A message can optionally include an image.</p> |
| **Geometry**    | A geometry represents the spatial component of a feature and defines its geographic location.                                                                                                                                                                                                                                             |
| **Style**       | A style defines the visual representation of vector data based on rules applied to feature properties.                                                                                                                                                                                                                                    |
| **Properties**  | Properties contain the non-spatial information of a feature.                                                                                                                                                                                                                                                                              |
| **Timestamp**   | A timestamp groups all vector files belonging to the same date range.                                                                                                                                                                                                                                                                     |
| **Time series** | Time series are sets of triples consisting of date, property, and value. They can be attached to a feature.                                                                                                                                                                                                                               |
| **Messages**    | Messages, optionally with images, can be attached to a feature.                                                                                                                                                                                                                                                                           |

#### Raster Layer

A raster layer is a layer used to store raster data.

| Term          | Definition                                                                  |
| ------------- | --------------------------------------------------------------------------- |
| **Timestamp** | A timestamp groups all raster files belonging to the same acquisition time. |
| **Style**     | A styling method used to represent raster data.                             |
| **Band**      | A raster consists of one or more bands of equal resolution.                 |

#### Point cloud Layer

A point cloud layer is a layer used to store point cloud data.

| Term          | Definition                                                                       |
| ------------- | -------------------------------------------------------------------------------- |
| **Timestamp** | A timestamp groups all point cloud files belonging to the same acquisition time. |

#### Ellipsis Layer / External Layer

| Term               | Definition                                                                                                     |
| ------------------ | -------------------------------------------------------------------------------------------------------------- |
| **Ellipsis Layer** | A layer hosted within Ellipsis Drive. All Ellipsis layers of the same type share the same abstract properties. |
| **External Layer** | Layers that are not hosted within Ellipsis Drive are referred to as external layers.                           |

#### ♻️ Sharing Status

Data in Ellipsis Drive can be shared by configuring the appropriate sharing status at the layer or folder level.

👉  Read more about sharing status [<mark style="color:blue;">here</mark>](/data-sharing/access.md).

***

#### 🔓 Access

**Access levels** define what actions users can perform on shared data. Users can be invited and assigned specific permissions.

A user added to a path is referred to as a **member.**

👉  Read more about access [<mark style="color:blue;">here</mark>](https://docs.ellipsis-drive.com/getting-started/quick-start/5.-define-user-access-level)

***

#### :file\_folder: File System

Each account has four roots: My Drive, Shared With Me, Favorites, and Trash. These roots contain folders, files, and layers (collectively referred to as paths).

|                    | Definition                                    |
| ------------------ | --------------------------------------------- |
| **My** **Drive**   | My Drive contains all paths owned by a user.  |
| **Shared With Me** | Contains all paths shared with a user.        |
| **Favorites**      | Contains all paths favorited by a user.       |
| **Trash**          | Contains all removed paths owned by the user. |

#### :minidisc: Storage

| Term                | Definition                                                                                               |
| ------------------- | -------------------------------------------------------------------------------------------------------- |
| **Active Storage**  | Active storage makes data available in the ED viewer and via web services.                               |
| **Passive Storage** | Data in passive storage is not directly available as an online map. It must be activated to be accessed. |

#### :earth\_asia: Ellipsis App

| Term                  | Definition                                                                     |
| --------------------- | ------------------------------------------------------------------------------ |
| **Drive**             | Used to manage file structure. Users can organize folders and layers.          |
| **Settings**          | Used to manage layer settings.                                                 |
| **Viewer**            | Used to inspect layers or create views from multiple layers.                   |
| **Community Catalog** | Used to search for public content.                                             |
| **Storage**           | Used to manage storage space and  your finances.                               |
| **Account**           | Used to manage username, avatar, OAuth client, and related workspace settings. |

#### ❌ Removal

Paths in Ellipsis Drive can be removed in two ways:

| Term       | Definition                   |
| ---------- | ---------------------------- |
| **Trash**  | A reversible removal action. |
| **Delete** | A permanent removal action.  |

#### :closed\_lock\_with\_key: Tokens

[Authentication](/developers/authentication-options.md) for non-public content and restricted actions requires tokens.

<table><thead><tr><th>Term</th><th>Definition</th><th data-hidden></th></tr></thead><tbody><tr><td><strong>User token</strong></td><td>A token obtained after login. It can be used for user-specific actions.</td><td></td></tr><tr><td><strong>Access token</strong></td><td>A token created for a set of paths where the user has sufficient permissions. It can be used to perform actions on specific content.</td><td></td></tr><tr><td><strong>OAuth token</strong></td><td>An OAuth token allows an application to access a user’s Drive with granted permissions.</td><td></td></tr></tbody></table>


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