44 ms·
It's over 400GB uncompressed, so currently this person would have to settle for a subset on a 128GB MicroSD like http://www.amazon.com/dp/B00IIJ6W4S/ http://www
by nswanberg 13y ago
It's over 400GB uncompressed, so currently this person would have to settle for a subset on a 128GB MicroSD like http://www.amazon.com/dp/B00IIJ6W4S/ http://www.amazon.com/dp/B00IIJ6W4S/. I think there are larger SD cards. And certainly there are small 1TB hard disks. I'm not sure what sort of device would be best for carrying around the world viewing these things, but probably what this person wants is possible, if expensive and inconvenient.
- maxerickson 13y agoThe uncompressed xml is not the right point of reference. The planet extracts in the pbf binary format are about 20 gigabytes. Looking at the OsmAnd map files, data for most of the world, in device ready format, would be several dozen gigabytes (even high density areas like California only end up being a few hundred megabytes).
- nswanberg 13y agoGood point. My estimate was a naive upper bound, ignoring things like efficient storage and assuming all data is included, and was focusing on how much storage is available on portable devices (that sometimes stretch the bounds of portable). Then the question is what does one do with all the extra space in this portable world device? Wikipedia information? Languages? Fun times.
- rmc 13y agoDon't forget indexes. That 33GB is without any indexes and in a basically random order.
- toomuchtodo 13y agoTablets with 512GB of flash in the next 2-3 years is definitely possible; I could see a small niche market for a "world atlas" Android/iOS app that stored OSM data and indexes compressed, and read portions the compressed files into memory for the relevant map data.
- maxerickson 13y agoThe OsmAnd people translate most of the world and I just checked, all their maps would fit into ~25 gigabytes. That's device ready, indexed data with quite a lot of overlap (they provide smaller extracts to help people save cell data and larger extracts for people that want them). That even includes a bunch of POI data from wikipedia. On the other hand, as a for instance, that total includes more data for Germany than for Africa.
- toomuchtodo 13y agoWikipedia (text articles alone) is about 10GB compressed. I'm in awe that I can carry around most of the world's mapping data and a lot of its knowledge on an SD card or my phone.
- maxerickson 13y agoThe Hitchhikers Guide to the Planet.
- toomuchtodo 13y agoThat's the plan.