What is the maximum number of markers or path vertices supported by the Google Static Maps API?
There is no limit to the number of markers or path vertices supported by the Google Static Maps API. However Static Maps API URLs can be a maximum of approximately 2,000 characters which constrains the number of markers and path vertices that can be specified based on the number of decimal places used when specifying each latitude/longitude pair. For information on how the number of decimal places used relates to the accuracy on the Earth see the Wikipedia article on Decimal Degrees.