DOC-2761 bit of progress

Author: andy-stark-redis

content/develop/interact/search-and-query/advanced-concepts/geo.md

@@ -0,0 +1,48 @@
+---
+categories:
+- docs
+- develop
+- stack
+- oss
+- rs
+- rc
+- oss
+- kubernetes
+- clients
+description: Learn how to use geospatial fields and perform geospatial queries in Redis
+linkTitle: Geospatial
+math: true
+title: Geospatial
+weight: 14
+---
+
+Redis Query Engine supports geospatial data. This feature
+lets you store geographical locations in the fields of JSON objects.
+You can then use queries to find the objects by their location.
+For example, if you add the locations of a set of shops, you can
+find all the shops within 5km of a user's position.
+
+Redis uses coordinate points to represent geospatial locations.
+You can store individual points but you can also
+use a set of points to define a polygon shape (the shape of a
+town, for example). You can query several types of interactions
+between points and shapes, such as whether a point lies within
+a shape or whether two shapes overlap.
+
+You can interpret coordinates either as geographical longitude
+and latitude or as Cartesian coordinates on a flat plane.
+Geographical coordinates are ideal for large real-world locations
+and areas (such as towns and countries). Cartesian coordinates
+are more suitable for smaller areas (such as rooms in a building)
+or for games, simulations, and other artificial scenarios.
+
+## Storing geospatial data
+
+Redis Query Engine uses the
+[*Well-Known Text*](https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry)
+format for geospatial data, specifically the `POINT` and `POLYGON`
+constructs.
+
+### `POINT` data
+
+