What map compression algorithm does Yandex.Navigator use?

Question

Data archiving

But actually I want to ask you Subj tovarischi.
ps actually more precisely interested in "Compresses some gzip + unpacking on the device."

Answer 1

There are layers.
1) the map itself in the form of a picture / pictures (here is some kind of octree)
2) roads in the form of a graph ( https://yandex.ru/company/technologies/routes/ )
3) a database in the form of some sqlite for association "address -> position on the map"
4) tons of code to work with all this
Compresses some gzip + unpacking on the device + reading the necessary pieces from the hdd of the device if necessary
You can see the openlayers.org github here