[DOC] New documentation: Self-host maps server (opensearch-project#1625)

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_dashboards/selfhost-maps-server.md

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+---
+layout: default
+title: Self-host maps server
+nav_order: 6
+---
+
+# Self-host maps server
+
+The self-host maps server for OpenSearch Dashboards allows users to access the default maps service in air-gapped environments. OpenSearch-compatible map URLs include a map manifest with map tiles and vectors, the map tiles, and the map vectors.
+
+The following sections provide steps for setting up and using the self-host maps server with OpenSearch Dashboards.
+
+You can access the `maps-server` image via the official OpenSearch [Docker Hub repository](https://hub.docker.com/u/opensearchproject).
+{: .note}
+
+## Pull Docker image
+
+Open your terminal and run the following command:
+
+`docker pull opensearch/opensearch-maps-server`
+
+## Set up the server
+
+You must set up the map tiles before running the server. You have two setup options: Use the OpenSearch-provided maps service tiles set, or generate the raster tiles set.
+
+### Option 1: Use the OpenSearch-provided maps service tiles set
+
+Create a Docker volume to hold the tiles set:
+
+`docker volume create tiles-data`
+
+Download the tiles set from the OpenSearch maps service. Two planet tiles sets are available based on the desired zoom level:
+
+- Zoom Level 8 (https://maps.opensearch.org/offline/planet-osm-default-z0-z8.tar.gz)
+- Zoom level 10 (https://maps.opensearch.org/offline/planet-osm-default-z0-z10.tar.gz)
+
+The planet tiles set for zoom level 10 (2 GB compressed/6.8 GB uncompressed) is approximately 10 times larger than the set for zoom level 8 (225 MB compressed/519 MB uncompressed).
+{: .note} 
+
+```
+docker run \
+    -e DOWNLOAD_TILES=https://maps.opensearch.org/offline/planet-osm-default-z0-z8.tar.gz \
+    -v tiles-data:/usr/src/app/public/tiles/data/ \
+    opensearch/opensearch-maps-server \
+    import
+```
+
+### Option 2: Generate the raster tiles set
+
+To generate the raster tiles set, use the [raster tile generation pipeline](https://github.com/opensearch-project/maps/tree/main/tiles-generation/cdk) and then use the tiles set absolute path to create a volume to start the server.
+
+## Start the server
+
+Use the following command to start the server using the Docker volume `tiles-data`. The following command is an example using host URL "localhost" and port "8080":
+
+```
+docker run \
+    -v tiles-data:/usr/src/app/public/tiles/data/ \
+    -e HOST_URL='http://localhost' \
+    -p 8080:8080 \
+    opensearch/opensearch-maps-server \
+    run
+```
+
+Or, if you generated the raster tiles set, run the server using that tiles set:
+
+```
+docker run \
+    -v /absolute/path/to/tiles/:/usr/src/app/dist/public/tiles/data/ \
+    -p 8080:8080 \
+    opensearch/opensearch-maps-server \
+    run
+```
+To access the tiles set, open the URLs in a browser on the host or use the `curl` command `curl http://localhost:8080/manifest.json`. 
+
+
+Confirm the server is running by opening each of the following links in a browser on your host or with a `curl` command (for example, `curl http://localhost:8080/manifest.json`).
+
+* Map manifest URL: `http://localhost:8080/manifest.json`
+* Map tiles URL: `http://localhost:8080/tiles/data/{z}/{x}/{y}.png`
+* Map tiles demo URL: `http://localhost:8080/`
+
+## Use the self-host maps server with OpenSearch Dashboards
+
+You can use the self-host maps server with OpenSearch Dashboards by either adding the parameter to `opensearch_dashboards.yml` or configuring the default WMS properties in OpenSearch Dashboards.
+
+### Option 1: Configure opensearch_dashboards.yml
+
+Configure the manifest URL in `opensearch_dashboards.yml`:
+
+`map.opensearchManifestServiceUrl: "http://localhost:8080/manifest.json"`
+
+### Option 2: Configure Default WMS properties in OpenSearch Dashboards
+
+1. On the OpenSearch Dashboards console, select **Stack Management > Advanced Settings**. 
+2. Locate `visualization:tileMap:WMSdefaults` under **Default WMS properties**. 
+3. Change `"enabled": false` to `"enabled": true` and add the URL for the valid map server.
+
+## Licenses
+
+Tiles are generated per [Terms of Use for Natural Earth vector map data](https://www.naturalearthdata.com/about/terms-of-use/) and [Copyright and License for OpenStreetMap](https://www.openstreetmap.org/copyright).
+
+## Related links
+
+* [Configure WMS map server]({{site.url}}{{site.baseurl}}/dashboards/maptiles/)
+* [Region map visualizations]({{site.url}}{{site.baseurl}}/dashboards/geojson-regionmaps/)