grassroots mapping building our own maps with open data coleman mccormick @colemanm 

my name is coleman @colemanm 

geography cartography software science to create better maps + data i use these 

making maps is historically the domain of government agencies big businesses militaries imagery providers 

google yahoo apple 

OpenStreetMap the alternative openstreetmap.org 

volunteer-constructed, open dataset of the world’s geographic information a gigantic collaborative project to map the world (the wikipedia of maps) 

gigantic? wikipedia: 42 GB openstreetmap: 370 GB where does all this data come from? image: tom macwright 

1.1 million contributors millions + millions of edits since 2004 2.7 billion GPS points democratizing the creation of maps photo: justin miller 

how it’s made + compatibly-licensed data imports (e.g. US Census, CanVec, + many more) 

using GPS :: traces from europe planet.openstreetmap.org/gps 

who does this stuff? 

people are contributing high-quality, local expertise instead of someone from another city showing up to map your neighborhood, you map your own cyclists humanitarian workers cartographers hikers runners et al. photo: mapbox 

ground-truthing + local authority are lacking in most commercial map data openstreetmap gives us maps built by the people that live there 

senegal russia philippines italy local communities all over the world (just to name a few...) 

why contribute? because openstreetmap is used by governments ● software companies ● schools photo: jean-louis zimmerman your openstreetmap contributions help real people 

how you can join us osmtampabay.org @osmtampabay 

USF campus great work by local mappers 

when anyone can contribute, you also see awesome stuff like this 

thanks! coleman mccormick [email protected] @colemanm spatialnetworks.com colemanm.org