No map will be visible when the API key has expired. They went home" mean in Maya Angelou's "They Went Home"? There may be downtime (planned or unplanned), and tile URLs may change. I don't understand why it is necessary to use a trigger on an oscilloscope for data acquisition. Thanks for contributing an answer to Stack Overflow! OpenLayers 3 Beginner’s Guide. use a different map projection? I know that there are other timelines for OpenLayers like maptimeline or timemap but none of these was what i needed for WikiTrip They are both based on Simile Timeline, which is really cool, but they don’t support cluster strategy and they are extremely slow with huge amount of data (>1000 points). This is a example: