In Kibana Heat Maps ,Can i get the value as zero if no incidents exits under a category(right now i am getting balnk spaces)
The problem is that Elasticsearch doesn't return 0 values for the query, so they aren't shown here.
It looks like you're using a terms agg here. In that case, you can use the JSON Input for the aggregation (it's hidden under Advanced) and add the following to get 0 values to show up:
{ "min_doc_count":0 }
This will cause Elasticsearch to "zero fill" the values, and then they'll show up in the heatmap.