title: R googleway map cannot be loaded
body: <p>I am trying to use R googleway to analyze crime records from NY Open Data. I want to add precinct polygon and crime circle to NY city map. However, even when I reduce the total crime points to 19k, I still cannot load the created map. Please see the code below. </p>
  
  <pre><code>map_key = "api_key
  ggmap = google_map(location = c(mean(40.730610), mean(-73.935242)), zoom = 
  11, key = map_key)
  ggmap %&gt;% add_polygons(data = nypp_df_gg, lat = "lat", lon = "lon", id = 
  "ID", pathId = "pathID") %&gt;% add_circles(lat = "Latitude", lon = 
  "Longitude", data = data.frame(NYPD_complaint_bf2006))
  </code></pre>
  
  <p>It does work if I limit the rows to 500. May I know if there is a way to visualize large observations>1MM? I tried to use add_heatmap but without any luck too.</p>
  
  <p>The code that works is </p>
  
  <pre><code>    ggmap %&gt;% add_polygons(data = nypp_df_gg, lat = "lat", lon = "lon", id = 
  "ID", pathId = "pathID") %&gt;% add_circles(lat = "Latitude", lon = 
  "Longitude", data = data.frame(NYPD_complaint_bf2006[1:500,]))
  </code></pre>