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Improve docs on spatial reference requirements (#14422)

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Thomas Neirynck 2017-10-11 15:33:21 -04:00
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docs/setup/settings.asciidoc
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@ -79,7 +79,7 @@ The minimum value is 100.
[[regionmap-settings]] `regionmap`:: Specifies additional vector layers for use in <<regionmap, Region Map>> visualizations. [[regionmap-settings]] `regionmap`:: Specifies additional vector layers for use in <<regionmap, Region Map>> visualizations.
Each layer object points to an external vector file that contains a geojson FeatureCollection. Each layer object points to an external vector file that contains a geojson FeatureCollection.
The file must use the WGS84 coordinate reference system and only include polygons. The file must use the [WGS84 coordinate reference system](https://en.wikipedia.org/wiki/World_Geodetic_System) and only include polygons.
If the file is hosted on a separate domain from Kibana, the server needs to be CORS-enabled so Kibana can download the file. If the file is hosted on a separate domain from Kibana, the server needs to be CORS-enabled so Kibana can download the file.
The url field also serves as a unique identifier for the file. The url field also serves as a unique identifier for the file.
Each layer can contain multiple fields to indicate what properties from the geojson features you want to expose. Each layer can contain multiple fields to indicate what properties from the geojson features you want to expose.