SlideShare a Scribd company logo
[object Object],[object Object]
OpenStreetMap like a game Who are the best players? Who are the  M ost  V aluable  P layers? Images from: http://www.flickr.com/photos/sully_aka__wstera2
The 90-9-1 Principle Jakob Nielsen's Alertbox, October 9, 2006  inShare68 Participation Inequality: Encouraging More Users to Contribute MVP!!! http://www.useit.com/alertbox/participation_inequality.html 1-9-90
How find? Common Sense: a user is a good player if gives many contributions to the map a test with an italian user
Nodes created by simone ? ? ? ? ? The complete Italy???
…  he is also a “data” importer ... http://wiki.openstreetmap.org/wiki/User:Simone#Data [...] I'm the prime guilty for the import of  the italian internal borders between  municipalities, provinces,  regions, and country [… ]
Solution Restrict the query only to some details, those requiring ,[object Object]
Experience
Recognition A good example: step_count=* 44 keys selected
Keys ... recycling:batteries recycling:cans recycling:clothes recycling:engine_oil recycling:glass recycling:paper recycling:plastic recycling:plastic_bottles recycling:plastic_packaging recycling:scrap_metal recycling:white_goods recycling:wood step.condition step_count step.height step.length surface surface.material traffic_calming traffic_sign trail_visibility visibility abandoned access access:bicycle access:bus access:foot access:hgv:max_length access:motorcar amenity bicycle bicycle:backward dispensing disused drinkable embankment foot foot:backward footway hiking horse incline oneway
this is the new result Locations: Personal life  (family, vacancy, work) OSM life  (mapping party, short journeys ...)
The “pet location” concept have a great care for a location as well as a lovable pet http://matt.dev.openstreetmap.org/owl_viewer/
Pet location vs Mapping Party frequency of update You will always find a mailbox that isn't mapped Edoardo Marascalchi italian osm mapper ...but there is always a little bit of noise
Like in OSMatrix Date of last edit Linus Law  "given enough eyeballs,  all bugs are shallow" Eric Raymond http://koenigstuhl.geog.uni-heidelberg.de/osmatrix/
Crowd Quality concept "The impact of crowdsourcing on spatial data quality indicators" M. van Exel, E. Dias, S. Fruijtier - 2010 attempts to quantify the ‘collective intelligence of the crowd generating data’ in a spatio-temporal context. User quality Local knowledge, Experience and Recognition Feature quality Like a MVP player How many different users contributed to a feature? How has a feature developed over time?
How MVP OSM works spatialite_osm_ raw osm xml spatialite differet vectors for a gis analysis sql https://github.com/napo/mvp-osm python
The imported tables structure osm_relation_way_refs  osm_relations  osm_way_node_refs  osm_node_tags  osm_way_tags  osm_nodes  osm_ways  osm_relation_node_refs osm_relation_relation_refs  osm_relation_tags [...] spatialite_osm_raw -o map.osm -d database.sqlite GEOMETRY (points)
An example with Trentino Alto Adige
STEP 1/3 – find the points Query to  extract the details 1253 users contributed to this map. 2465872 points 600 users match the query 13675 points
STEP 2/3 - Density create a grid ... (in this case) 1 km 1 km
STEP 2/3 - Density ... calculate the data density for each user this operation calculate only the  users active over the past 3 months In this case 147 users 2.444 cells
STEP 3/3 - cluster cluster the data for each user by distance
Data Analisys (1/2) Pet location for a user (1) and where is the most activity (2)

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MVP OSM

  • 1.
  • 2. OpenStreetMap like a game Who are the best players? Who are the M ost V aluable P layers? Images from: http://www.flickr.com/photos/sully_aka__wstera2
  • 3. The 90-9-1 Principle Jakob Nielsen's Alertbox, October 9, 2006 inShare68 Participation Inequality: Encouraging More Users to Contribute MVP!!! http://www.useit.com/alertbox/participation_inequality.html 1-9-90
  • 4. How find? Common Sense: a user is a good player if gives many contributions to the map a test with an italian user
  • 5. Nodes created by simone ? ? ? ? ? The complete Italy???
  • 6. … he is also a “data” importer ... http://wiki.openstreetmap.org/wiki/User:Simone#Data [...] I'm the prime guilty for the import of the italian internal borders between municipalities, provinces, regions, and country [… ]
  • 7.
  • 9. Recognition A good example: step_count=* 44 keys selected
  • 10. Keys ... recycling:batteries recycling:cans recycling:clothes recycling:engine_oil recycling:glass recycling:paper recycling:plastic recycling:plastic_bottles recycling:plastic_packaging recycling:scrap_metal recycling:white_goods recycling:wood step.condition step_count step.height step.length surface surface.material traffic_calming traffic_sign trail_visibility visibility abandoned access access:bicycle access:bus access:foot access:hgv:max_length access:motorcar amenity bicycle bicycle:backward dispensing disused drinkable embankment foot foot:backward footway hiking horse incline oneway
  • 11. this is the new result Locations: Personal life (family, vacancy, work) OSM life (mapping party, short journeys ...)
  • 12. The “pet location” concept have a great care for a location as well as a lovable pet http://matt.dev.openstreetmap.org/owl_viewer/
  • 13. Pet location vs Mapping Party frequency of update You will always find a mailbox that isn't mapped Edoardo Marascalchi italian osm mapper ...but there is always a little bit of noise
  • 14. Like in OSMatrix Date of last edit Linus Law "given enough eyeballs, all bugs are shallow" Eric Raymond http://koenigstuhl.geog.uni-heidelberg.de/osmatrix/
  • 15. Crowd Quality concept "The impact of crowdsourcing on spatial data quality indicators" M. van Exel, E. Dias, S. Fruijtier - 2010 attempts to quantify the ‘collective intelligence of the crowd generating data’ in a spatio-temporal context. User quality Local knowledge, Experience and Recognition Feature quality Like a MVP player How many different users contributed to a feature? How has a feature developed over time?
  • 16. How MVP OSM works spatialite_osm_ raw osm xml spatialite differet vectors for a gis analysis sql https://github.com/napo/mvp-osm python
  • 17. The imported tables structure osm_relation_way_refs osm_relations osm_way_node_refs osm_node_tags osm_way_tags osm_nodes osm_ways osm_relation_node_refs osm_relation_relation_refs osm_relation_tags [...] spatialite_osm_raw -o map.osm -d database.sqlite GEOMETRY (points)
  • 18. An example with Trentino Alto Adige
  • 19. STEP 1/3 – find the points Query to extract the details 1253 users contributed to this map. 2465872 points 600 users match the query 13675 points
  • 20. STEP 2/3 - Density create a grid ... (in this case) 1 km 1 km
  • 21. STEP 2/3 - Density ... calculate the data density for each user this operation calculate only the users active over the past 3 months In this case 147 users 2.444 cells
  • 22. STEP 3/3 - cluster cluster the data for each user by distance
  • 23. Data Analisys (1/2) Pet location for a user (1) and where is the most activity (2)
  • 24. Data analisys 2/2 heat map of the locations
  • 25.