# Welcome to TileViewer TileViewer is a feature-rich web application for viewing and analyzing astronomical maps. TileViewer uses [OpenLayers](https://openlayers.org/) to render the baselayer maps, source catalogs, and regions of interest. ```{image} images/initial_view.png :alt: Typical initial view :width: 900px :align: center ``` ```{toctree} :maxdepth: 3 :hidden: getting-started.md usage.md keyboard-shortcuts.md ```