How can I plot Google map with Long and Lat?

Can you try using Logstash to transform your data? Take a look at the mutate plugin filter, specifically configured with add_field: https://www.elastic.co/guide/en/logstash/current/plugins-filters-mutate.html#plugins-filters-mutate-add_field.

You'll want to end up with something like this:

filter {
  mutate {
    rename => {
      'latitude' => '[geo][lat]'
      'longitude' => '[geo][lon]'
    }
  }
}

or:

filter {
  mutate {
    rename => {
      'latitude' => '[geo][0]'
      'longitude' => '[geo][1]'
    }
  }
}

For some more context, what we're trying to do is wrangle some of your data to create a new field which conforms to the geo_point datatype (https://www.elastic.co/guide/en/elasticsearch/reference/current/geo-point.html).

CJ