6 ms·
They seem to have forgotten that the imagery database is calculated at multiple zoom levels. If a country has high rest imagery for the max zoom, it also has sc
by sievebrain 11y ago
They seem to have forgotten that the imagery database is calculated at multiple zoom levels. If a country has high rest imagery for the max zoom, it also has scaled down versions of that imagery for all the higher altitude image sets.
So that would expand things quite a bit.
There are also height maps, which were not counted, and metadata.
- brianwawok 11y agoWould it? If full detail zoom took 1 MB... that same area zommed out 2x would take 256KB.. zoomed out by 2 is 64 KB... zoomed out by 2x is 16 KB... Don't know all the zoom levels, but for a rough guess the zoomed in level should be pretty close to the total (within 30% or so).
- Bjartr 11y agoDepends on if it's precalculated or dynamically generated from the full res and then cached.
- Retric 11y agoClients are clearly doing some scaling. So worst case is clearly less than 35% overhead for multiple zoom levels. PS: Sum (0 to N) of (1/4)^N = 1.33333...
- brianwawok 11y agoThanks for adding the maths I did the lazy guess ;)
- JoBrad 11y agoHe talks about the height of the camera, and loading additional images, in the first post of the series.