Do you have any information written up on how you render so many points via the google maps API? I have built a similar tool[1] and struggled with performance and had to limit the amount of data points displayed at any one time.<p>Also, have you looked at Freebase[2]? This is what I used as the data source for mountains.io. They appear to have a decent amount of data for battles[3].<p>[1] <a href="https:&#x2F;&#x2F;www.mountains.io&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.mountains.io&#x2F;</a><p>[2] <a href="https:&#x2F;&#x2F;www.freebase.com" rel="nofollow">https:&#x2F;&#x2F;www.freebase.com</a><p>[3] <a href="http:&#x2F;&#x2F;tinyurl.com&#x2F;gr62x4u" rel="nofollow">http:&#x2F;&#x2F;tinyurl.com&#x2F;gr62x4u</a>