How to use NeuroJSON.io

NeuroJSON.io website provides an intuitive interface for users of any experience level to easily navigate across potentially vast amount of public/free datasets curated by NeuroJSON developers and contributors. It offers web-based interfaces to preview the data items before download, and provides convenient search functionalities to help users identify the desired datasets for their analyses.

Before we start, please always keep in mind that NeuroJSON.io contains many databases; each database contains many datasets; each dataset contains one or many subjects.

1. Browse databases

1.1. Landing page

1.2. Database information

1.3. Browse and query a database

1. Browse databases

1.1. Landing page

The NeuroJSON.io main page serves as the entry point for exploring NeuroJSON free datasets, referred to as the "data constellation", showing a self-organizing map of existing data collections in the form of a 3-D force graph (thanks to the open-source 3d-force-graph Javascript library). Key features of this graph include

• each node on the graph is a "data collection", containing many datasets
• the size of each node is correlated to the number of datasets contained
• the color of each node is computed based on the included data modalities (MRI, EEG, MEG, fNIRS etc)
• links are added between nodes containing the same modality, bundling them together; the color of the link is modality specific
• use your cursor, you can drag, rotate, zoom in/out of the graph; clicking on any of the nodes, you could see the detailed metadata of the data collection in a side bar

1.2. Database information

A side panel is shown on the left whenever a user select a database (a node) on the "data constellation". In this panel, additional details regarding the data collection are listed, including the upstream website, data modality types, standards etc. Specifically, if such data collection has been curated by NeuroJSON, an additional block is shown on the

1.3. Browse and query a database

When clicking on the "Browse Database" button in the database information panel, your browser will load a webpage that help you navigate and search different datasets