Ultra-metric spaces matter for data science where hierarchical concepts should be preserved and symmetries need to be exploited.
Slides for the introduction talk on p-adic numbers are at
[slideshare id=148971289&doc=p-adic-190606080759]
Ultra-metric spaces matter for data science where hierarchical concepts should be preserved and symmetries need to be exploited.
Slides for the introduction talk on p-adic numbers are at
[slideshare id=148971289&doc=p-adic-190606080759]
The navigation software OSMand provides online and offline navigation. Their open-source software depends on openstreetmap (OSM) a volunteered geographic data initiative. Map data can be added by any person using different software tools. In some cities mapping parties are held to increase data quality of OSM and to teach people the fundamentals of geographic information systems. Relying on the data coverage and qulity of OSM, recently, OSMLive started to provide monetary incentives for openstreetmap edits. The openstreemap editor just registeres at the website https://www.osmand.net/osm_live#report and then its contributions to OSM are counted. According to this counts a regional leaderboard is created and a rank is assigned to every contributor. Based on this rank a donated amount of bitcoins is shared amongst the contributors, though 50% of the donated sum stays with OSMand.
Below you see the leaderboard of last month just in North Rhine-Westphalia, Germany:
As can be seen user Farkad5 obtained 0.0252 mBTC for 60 changes to OSM and was on rank 1 (this translates to approx. Eur 0.23 on Dec 1st). Well, this seems to be a very productive user that contributes a lot to the OSM map quality. Especially if you consider the usage of OSMand updated streets, turning restrictions or speed limits are benefitial. So let’s see which of these Farkad5 contributed to the map. If we want to see the edits of the user in detail we browse to the page https://www.openstreetmap.org/user/Farkad5/history.
Openstreetmap displays a map with orange boxes indicating the regions where Farkad5 edited the maps.
To the left you see the list of edits in detail and their commit comment. He states ‘added road surface’ in all recent commits and if we check the details of her edit she marked the streeets as aphalted.
Isn’t it great to earn money by tagging 60 streets – foremost motorways – as asphalted? Start also mapping today!