Having said that, I think a coordinate map is likely what you're looking for here. Regarding your mapping, you'll want to target the geo-point type rather than lat/long floats. You can find more information about this type here:
I have been looking all documentation u posted, it's looks like I need to change location type to geo_point but I don't find the way to do that. I read that I need reindex, however I only found it applied to change index type and not field type and I haven't very clear how apply it to type of fields changes. I'm new with elk and I'm a little bit loose, I'm sorry and very tankful for the help.
I'd recommend re-indexing your data. You'll probably want to walk through both indexing and mappings (mappings will cover specifying field types, such as geo_point). Here are a couple of resources to get you started:
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