openstreetmap
DESCRIPTION
An intro to OpenStreetMap for the Geography department of the University of Utah.TRANSCRIPT
OpenStreetMapThe Free and Open World Map
Martijn van Exel
10/21/11
OpenStreetMap is a free editable map of the whole world. It is made by people like you.
OpenStreetMap allows you to view, edit and use geographical data in a collaborative way
from anywhere on Earth.
OpenStreetMap is Volunteered Geographic Information: the harnessing of tools to create, assemble, and disseminate geographic data provided voluntarily by individuals.Goodchild, M.F. (2007). "Citizens as sensors: the world of volunteered geography". GeoJournal 69 (4): 211–221
Free
● As in: without (many) licensing restrictions
● As in: at no cost to acquire
Editable
● Compare to Wikipedia● 450,000 contributors
● Data is always in flux
OpenStreetMap objects
NodesPoints with (X,Y) and attributes
WaysOrdered set of nodes. Polygons are closed ways, not a separate entity. Can have attributes.
RelationsGroups of objects with a functional or geographic relationship
OpenStreetMap data model
OpenStreetMap ‘Standards’
● Conventions rather than standards● Discussed on mailing lists and Wiki
● Proposal and voting system for new tags
● You can map whatever you want● The only rule is verifiability
OpenStreetMap editing tools
Potlatch – Flash-based web editor
OpenStreetMap editing tools
JOSM – Java-based desktop editor
Mapping Strategies (1)
Surveying with GPS, Camera, pen & paper
Mapping Party in the UK
Mapping Strategies (1)
Surveying with GPS, Camera, pen & paper
Walking Papers
Mapping Strategies (2)
“Armchair mapping”• Permission to
trace over Bing satellite and aerial imagery
• Enables mapping remote / disaster areas without local contributors
OpenStreetMap in Haiti
Mapping Strategies (3)
Importing free and open data
US TIGER line data import
OpenStreetMap is many maps
OpenCycleMap
http://opencyclemap.org/
OpenCycleMap
TopOSM
http://toposm.com/us/index.html
TopOSM
http://8bitcity.com/map?New%20York
8-bit cities
https://wiki.openstreetmap.org/wiki/Featured_Images/Jul-Sep_2011#Week_27
Maps on a blanket
https://wiki.openstreetmap.org/wiki/Featured_Images/Jul-Sep_2010
Printed Maps
https://secure.flickr.com/photos/smsm1/4540641425/
http://www.kindle-maps.com/blog/kindle-specific-map-style.html
Maps on a Kindle
http://www.rollstuhlrouting.de/routenplaner.html
Wheelchair Routing
https://wiki.openstreetmap.org/wiki/Featured_Images/Oct-Dec_2011#Week_41
Maps and directions on a SatNav
OpenTripPlanner
OpenTripPlanner• Multimodal trip planner for Portland metro
• Beta launched this week
• All Open Source software
• OpenStreetMap as base layer – most cost effective solution
• Result: improved trip advice, lower cost
• But: data quality not consistent – lot of cleanup / enhancement required
● Free form● Driven by personal
needs and interests● Organic● Bottom-up● Continuous
● Commissioned● Driven by abstracted
use cases● Pre-defined● Top-down● Discrete
VS. COLDWARMG E O G R A P H Y
Warm geography requires local communities
OpenStreetMap requires local communities
Ortigas/Mandaluyong (Phillipines) mapping partyPhoto from http://bit.ly/oJ3fKZ
Mapquest TIGER viewer
● 95% of edits done by 12% of users● 9% untouched TIGER● 4.8 avg version increase of TIGER roads● 8% of features touched in last 3 months, 40% in last year
Community score card
77°
● 95% of edits done by 5% of users● 32% untouched TIGER● 1.4 avg version increase of TIGER roads● 14% of features touched in last 3 months, 52% in last year
Community score card
59°
● 95% of edits done by 13% of users● 4% untouched TIGER● 4.2 avg version increase of TIGER roads● 2% of features touched in last 3 months, 7% in last year
Community score card
59°
● 95% of edits done by 27% of users● 13% untouched TIGER● 2.6 avg version increase of TIGER roads● 26% of features touched in last 3 months, 62% in last year
Community score card
87°
● 95% of edits done by 6% of users● 24% untouched TIGER● 1.5 avg version increase of TIGER roads● 3% of features touched in last 3 months, 5% in last year
Community score card
38°
● 95% of edits done by 8% of users● 40% untouched TIGER● 0.9 avg version increase of TIGER roads● 4% of features touched in last 3 months, 12% in last year
Community score card
34°
● 95% of edits done by 26% of users● 80% untouched TIGER● 0.4 avg version increase of TIGER roads● 1% of features touched in last 3 months, 7% in last year
Community score card
20°
SIGN-UP
CONTRIBUTE
COLLABORATE
OWN
Conclusions
● Free and editable geodata inspires and enables● OpenStreetMap is good enough for
professional use*● Local communities required for up-to-date, HQ
data● Barrier to entry is a significant challenge for
OpenStreetMap