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 * [Home](./README.md)
 * [Data Schema/Ontology](ontology.md)
+* [S2 Integration](s2-implementation.md)
 * [Downloading Data](sparql-download.md)
   * [Walkthrough](./data-download-walkthrough.md)
   * [Downloading Bulk Data](./bulk-download.md)
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+# S2 Integration
+
+KnowWhereGraph uses the [S2 system](http://s2geometry.io/) for a global grid structure. This allows for a structure where [RCC](https://en.wikipedia.org/wiki/Region_connection_calculus) relations can be used to locate things within, between, overlapping, etc cells. The process of forming these relation with custom geometries is what we refer to as *integration*.
+
+## Integrating Your Data
+
+We provide a [tool](https://github.com/KnowWhereGraph/s2-coverings) for both generating s2 cell geometries and integrating custom geometries with them. It's generally un-necessary to generate your own S2 cells because they've been generated and exist within KnowWhereGraph - and the relations can be formed in relation to those.