[Maps] pew pew source

[nreese]

This PR adds a new Connection source. The source uses a terms aggregation to identify destinations and nests a geo_grid aggregation to get rolled up source connections. Each destination/source grid cell are converted into line feature.

Here is the elasticsearch request

{
  "size": 0,
  "aggs": {
    "destSplit": {
      "terms": {
        "script": {
          "source": "doc['DestLocation'].value.toString()",
          "lang": "painless"
        },
        "order": {
          "_count": "desc"
        },
        "size": 100
      },
      "aggs": {
        "sourceGrid": {
          "geotile_grid": {
            "field": "OriginLocation",
            "precision": 3
          },
          "aggs": {
            "sourceCentroid": {
              "geo_centroid": {
                "field": "OriginLocation"
              }
            }
          }
        }
      }
    }
  },
  "_source": {
    "excludes": []
  },
  "stored_fields": [
    "*"
  ],
  "script_fields": {
    "hour_of_day": {
      "script": {
        "source": "doc['timestamp'].value.hourOfDay",
        "lang": "painless"
      }
    }
  },
  "docvalue_fields": [
    {
      "field": "timestamp",
      "format": "date_time"
    }
  ],
  "query": {
    "bool": {
      "must": [
        {
          "match_all": {}
        },
        {
          "geo_bounding_box": {
            "DestLocation": {
              "top_left": [
                -180,
                90
              ],
              "bottom_right": [
                180,
                -90
              ]
            }
          }
        },
        {
          "range": {
            "timestamp": {
              "format": "strict_date_optional_time",
              "gte": "2019-07-11T19:18:28.142Z",
              "lte": "2019-07-18T19:18:28.142Z"
            }
          }
        }
      ],
      "filter": [],
      "should": [],
      "must_not": []
    }
  }
}

[elasticmachine]

Pinging @elastic/kibana-gis

[elasticmachine]

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[spong]

As we chatted about, looks like the fields within the Layer Style pane are not populating. Also missing I believe is the tooltip configuration pane for when clicking on the line. Will keep testing and let you know what I find. This is awesome so far -- thanks!

[nreese]

As we chatted about, looks like the fields within the Layer Style pane are not populating.

Sorry about that, the POC had yet to implement metric selection which is why the "layer style" select was empty.

I have pushed some changes that add the ability to configure metrics for the source. These metrics are then available for dynamic styling in the layer style field select.

[nreese]

Also missing I believe is the tooltip configuration pane for when clicking on the line

There will never be a tooltip configuration for this source because its an aggregation source. The tooltip will just display the metric aggregations that have been configured for the source.

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[nreese]

retest

[kindsun]

Update i18n to xpack.maps.source.pewPew.noGeoFieldErrorMessage

[elasticmachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request

[kindsun]

Overall a really nice feature. Nice work! You've finished most of the requested changes already. Some final minor i18n work requested. If you can, get that in and then with green CI, lgtm!

• code review
• tested locally in chrome