[maps] Update point to point docs with use cases (#89246)

Co-authored-by: Kent Marten <kmartastic@users.noreply.github.com>
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Kent Marten 2021-01-27 09:34:03 -08:00 committed by GitHub
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@ -98,6 +98,13 @@ Point to point uses an {es} {ref}/search-aggregations-bucket-terms-aggregation.h
Then, a nested {ref}/search-aggregations-bucket-geotilegrid-aggregation.html[GeoTile grid aggregation] groups sources for each destination into grids.
A line connects each source grid centroid to each destination.
Point-to-point layers are used in several common use cases:
* Source-destination maps for network traffic
* Origin-destination maps for flight data
* Origin-destination flows for import/export/migration
* Origin-destination for pick-up/drop-off data
image::maps/images/point_to_point.png[]
[role="xpack"]