# Overlay Layers

Overlay Layers refers to any data layer not include in a [Basemap](https://docs.seasketch.org/seasketch-documentation/administrators-guide/basemaps-maps). SeaSketch supports [directly uploading spatial data](https://docs.seasketch.org/seasketch-documentation/administrators-guide/overlay-layers/uploading-spatial-data) in SeaSketch, as well as data from remote web services. It also supports managing [layer metadata](https://docs.seasketch.org/seasketch-documentation/administrators-guide/overlay-layers/metadata-and-attribution), updating and [tracking data versions](https://docs.seasketch.org/seasketch-documentation/administrators-guide/uploading-spatial-data#managing-new-versions-of-a-dataset), includes [advanced cartography tools](https://docs.seasketch.org/seasketch-documentation/administrators-guide/overlay-layers/cartographic-styling), and numerous [interactivity options](https://docs.seasketch.org/seasketch-documentation/administrators-guide/overlay-layers/interactivity-and-popups).

We aim for SeaSketch to provide a complete data portal solution in a single tool, using the latest technology to make data viewing and management fast and intuitive. Anyone can using SeaSketch to support marine conservation planning can create a project, and each include 10 GB of free data hosting.