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title: TDEI Data Viewer
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## TDEI Data Viewer

The [TDEI Data Viewer](https://dataviewer.tdei.us/) is a browser-based interface for browsing public TDEI project groups, released datasets, and mapped transportation features. It includes dataset search, interactive maps, feature inspection, and an issue-reporting form.

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![TDEI Data Viewer project group page with dataset search and its map boundary](../../resources/images/tdei/data-viewer/index/example-project-group-light.avif#only-light)
![TDEI Data Viewer project group page with dataset search and its map boundary](../../resources/images/tdei/data-viewer/index/example-project-group-dark.avif#only-dark)

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### Guides

TDEI Data Viewer Guides

_For a list of all guides on the TCAT Wiki, refer to the [Guides List](../../guides-list/index.md)._{ .guides-list-ref }

#### [TDEI Data Viewer User Manual](user-manual/index.md)

This user manual describes the TDEI Data Viewer interface for browsing public project groups, released datasets, mapped features, and issue-reporting controls.