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[[maps-troubleshooting]]
== Troubleshoot Maps
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Troubleshoot
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Use the information in this section to inspect Elasticsearch requests and find solutions to common problems.
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=== Inspect Elasticsearch requests
Maps uses the {ref}/search-search.html[{es} search API] to get documents and aggregation results from {es}. To troubleshoot these requests, open the Inspector, which shows the most recent requests for each layer. You can switch between different requests using the *Request* dropdown.
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image::maps/images/inspector.png[]
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=== Solutions to common problems
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==== Data view not listed when adding layer
* Verify your geospatial data is correctly mapped as {ref}/geo-point.html[geo_point] or {ref}/geo-shape.html[geo_shape].
** Run `GET myIndexName/_field_caps?fields=myGeoFieldName` in <>, replacing `myIndexName` and `myGeoFieldName` with your index and geospatial field name.
** Ensure response specifies `type` as `geo_point` or `geo_shape`.
* Verify your geospatial data is correctly mapped in your <>.
** Open your data view in <>.
** Ensure your geospatial field type is `geo_point` or `geo_shape`.
** Ensure your geospatial field is searchable and aggregatable.
** If your geospatial field type does not match your Elasticsearch mapping, click the *Refresh* button to refresh the field list from Elasticsearch.
* Data views with thousands of fields can exceed the default maximum payload size.
Increase <> for large data views.
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==== Features are not displayed
* Use Inspector to view {es} responses. Ensure the response is not empty.
* Ensure geometry uses the correct latitude and longitude ordering.
** Geo-points expressed as strings are ordered as `"latitude,longitude"`. Geo-points expressed as arrays are ordered as the reverse: `[longitude, latitude]`.
** Geo-shapes expressed as geojson provide coordinates as `[longitude, latitude]`.
* Ensure fill color and border color are distinguishable from map tiles. It's hard to see white features on a white background.
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==== Elastic Maps Service basemaps are not displayed
*Maps* uses tile and vector data from Elastic Maps Service by default. See <> for more info.
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==== Custom tiles are not displayed
* When using a custom tile service, ensure your tile server has configured https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS[Cross-Origin Resource Sharing (CORS)] so tile requests from your {kib} domain have permission to access your tile server domain.
* Ensure custom vector and tile services have the required coordinate system. Vector data must use EPSG:4326 and tiles must use EPSG:3857.