Timesliding canvas maplayer
After someone saw my BAG building data movie 
he asked if it would be possible to create an interactive map of the entire Netherlands. This made me think, since creating the movie was a very time consuming action. The problem is that there are about 6 million buildings in the BAG database. This makes the data a bit unwieldy to use directly in the browser. The old fashioned way to do time series on maps involves creating a new layer for each time-moment (year in this case). This would mean that there would be over 150 layers to be loaded on the map and switching between those for the ‘time sliding’ effect. Apart from the hideous task to set up 150 almost the same layers, it would end up with too much images for a browser to handle.