# nasa/modis-viirs-data-resources architecture

> Architecture diagram of the GitHub repository nasa/modis-viirs-data-resources, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-14). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/nasa/modis-viirs-data-resources
- Repository: https://github.com/nasa/modis-viirs-data-resources

## Overview

This repository is a collection of practical MODIS and VIIRS data tutorials, not a shared runtime library. Its documented workflows guide users through searching for and accessing datasets, then working with VIIRS vegetation data or converting MCD19A2 data to Cloud Optimized GeoTIFFs. The graph follows those notebook-centered paths and includes the documented Earthdata Cloud source for the VIIRS tutorial. Source excerpts were not provided, so relationships are limited to the README’s descriptions.

Main entry points: [`python/how_to_convert_mcd19A2_to_cogs.ipynb`](https://github.com/nasa/modis-viirs-data-resources/blob/main/python/how_to_convert_mcd19A2_to_cogs.ipynb) (Convert MCD19A2), [`python/tutorials/Exploring_VIIRS_Vegetation_Data_From_Earthdata_Cloud.ipynb`](https://github.com/nasa/modis-viirs-data-resources/blob/main/python/tutorials/Exploring_VIIRS_Vegetation_Data_From_Earthdata_Cloud.ipynb) (Explore VIIRS data)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_viirs["VIIRS Tutorial"]
  node_viirs_tutorial["Explore VIIRS data"]
end

subgraph group_modis["MODIS Conversion"]
  node_mcd19a2_tutorial["Convert MCD19A2"]
end

node_user(("Data user"))
node_earthdata_cloud["Earthdata Cloud"]
node_mcd19a2["MCD19A2 data"]
node_cogs["Cloud Optimized GeoTIFFs"]

node_user -->|"uses"| node_viirs_tutorial
node_viirs_tutorial -->|"searches and accesses"| node_earthdata_cloud
node_user -->|"uses"| node_mcd19a2_tutorial
node_mcd19a2_tutorial -->|"searches and accesses"| node_mcd19a2
node_mcd19a2_tutorial -->|"converts to"| node_cogs

click node_viirs_tutorial "https://github.com/nasa/modis-viirs-data-resources/blob/main/python/tutorials/Exploring_VIIRS_Vegetation_Data_From_Earthdata_Cloud.ipynb"
click node_mcd19a2_tutorial "https://github.com/nasa/modis-viirs-data-resources/blob/main/python/how_to_convert_mcd19A2_to_cogs.ipynb"
click node_cogs "https://github.com/nasa/modis-viirs-data-resources/blob/main/python/how_to_convert_mcd19A2_to_cogs.ipynb"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_viirs_tutorial,node_user toneBlue
class node_mcd19a2_tutorial toneAmber
class node_earthdata_cloud,node_mcd19a2 toneIndigo
class node_cogs toneTeal
```

## Components

### VIIRS Tutorial

- [Explore VIIRS data](https://github.com/nasa/modis-viirs-data-resources/blob/main/python/tutorials/Exploring_VIIRS_Vegetation_Data_From_Earthdata_Cloud.ipynb): `python/tutorials/Exploring_VIIRS_Vegetation_Data_From_Earthdata_Cloud.ipynb`

### MODIS Conversion

- [Convert MCD19A2](https://github.com/nasa/modis-viirs-data-resources/blob/main/python/how_to_convert_mcd19A2_to_cogs.ipynb): `python/how_to_convert_mcd19A2_to_cogs.ipynb`

### Other components

- **Data user**
- **Earthdata Cloud**
- **MCD19A2 data**
- [Cloud Optimized GeoTIFFs](https://github.com/nasa/modis-viirs-data-resources/blob/main/python/how_to_convert_mcd19A2_to_cogs.ipynb): `python/how_to_convert_mcd19A2_to_cogs.ipynb`

## Connections

- Data user → Explore VIIRS data: uses (evidence: `README.md`)
- Explore VIIRS data → Earthdata Cloud: searches and accesses (evidence: `README.md`)
- Data user → Convert MCD19A2: uses (evidence: `README.md`)
- Convert MCD19A2 → MCD19A2 data: searches and accesses (evidence: `README.md`)
- Convert MCD19A2 → Cloud Optimized GeoTIFFs: converts to (evidence: `README.md`)