如何在不超出配额限制的情况下在angularJs数据表中使用Google Maps地理编码器

I have a datatable in whch I need to find a city name based on lat and lng. I'm trying to use Google maps geocoder in order to reverse coding latitude and longitude into city name. I created a function to do that but I'm getting limit rate exceeded since I have a lot of rows in the datatable.I have a datatable in whch I need to find a cit