#DailyBloggingChallenge (143/200)
TIL how zooming on maps work. The fascinating part is how much data needs to be store to make it feel seamlessly.
In (1) they work with an initial presetation of Earth on a 256px x 256px square for a zoom of 0.
When zooming in by one level the spuare length is doubled and thereby the Earth is being presented on 4 times 256px x 256px square for a zoom of 1.
This can be generalized to $4^{zoom}$ for square count and $squareLength_0 * 2^{zoom}$ for square length.
#LeafletJs states in (1) that tile servers max out at a zoom level of 18, whereas #OpenStreetMap’s website goes to zoom 19. At zoom 19 the legend distance is at 5m. On #OsmAnd the max zoom achieves a legend distance of 1m.
One can just imagine how much data is being stored/provided to achieve such a zoom level of detail.
References:
@barefootstache in terms of tile or geographic data?
Also, when you speak of 1m or 5m, I think you're talking about at the Equator. Toward the poles those distances become more and more small.
