問題文
An interactive exploration of 300 million geolocated points needs to stay responsive while the analyst pans and zooms. Which approach is designed for that scale?
選択肢
- Round the coordinates to two decimals and plot the distinct values, so the point count drops far enough for the display to keep up at any zoom.
- Draw every point as an individual marker in the browser and let the rendering engine handle the volume, because modern engines are able to composite very large numbers of markers efficiently once they have been transferred once.
- Take a random sample of ten thousand points and plot those.
- Aggregate the points into a pixel grid on the accelerator and render the grid as an image, recomputing it at each new zoom level.