2013 URISA Track, Android GPS Deep Dive by Andy Gup
•
0 likes•985 views
This is a must attend session for developers either planning to use or already using Android GPS in your native applications. Android offers one of the most flexible GPS systems that are available in smartphones today. We'll look at key aspects of the Location Manager Class, and provide real-world use cases on how to best implement them. You'll walk away with insight that typically takes days or even weeks to figure out.
Recommended
More Related Content
Similar to 2013 URISA Track, Android GPS Deep Dive by Andy Gup
Similar to 2013 URISA Track, Android GPS Deep Dive by Andy Gup (20)
More from GIS in the Rockies
More from GIS in the Rockies (20)
Recently uploaded
Recently uploaded (20)
2013 URISA Track, Android GPS Deep Dive by Andy Gup
- 1. Android GPS Deep Dive! Na2ve and Browser Andy Gup, Esri www.andygup.net @agup
- 2. I GPS
- 3. Who am I? Andy Gup Web, Mobile Developer Evangelist www.andygup.net github.com/andygup agup@esri.com @agup
- 4. Is smartphone GPS right for you? Understanding use cases Understanding smartphone GPS! Deciding accuracy thresholds
- 5. Two open source tes2ng tools
- 6. Android GPS Test Tool
- 7. HTML5 Geoloca2on Test Tool
- 8. Six types of loca2on data Real-‐2me GPS Network Cached GPS Network Passive NMEA
- 9. Two types of loca2on data Real-‐2me Cached
- 10. Android SDK Java based Loca2onManager Loca2on APIs Significantly more control over data providers baVery life offline usage when app is minimized
- 11. HTML5 Geoloca2on API JavaScript-‐based Significantly less control over which providers are used baVery life Can’t be used when minimized
- 12. Horizontal and ver2cal Grades: Recrea2onal Map Survey High-‐end Survey Accuracy Requirements
- 13. Horizontal and ver2cal Grades: Recrea2onal > 3 m/10 `* (Android, iOS, iPad, Garmin, etc) Map 1 – 3 meters/3.2 – 9.8 `* Survey < 1 m/3.2 `* High-‐end Survey < 50 cm/1.6 `* Accuracy Requirements * Approxima2ons
- 14. Horizontal and ver2cal Grades: Recrea2onal -‐ $ (Android, iOS, iPad, Garmin, etc) Map -‐ $$ Survey -‐ $$$ High-‐end Survey -‐ $$$$ Costs
- 15. Accuracy fluctuates…moves around…!! Recrea2onal-‐grade accuracy??
- 16. Horizontal and ver2cal < 1 cm = boundary/survey marker, gas line < 1 m = manhole cover, 1 – 3 meters = tree, trail head, junc2on box, pothole 3 – 10 meters = roo`op, fire hydrant 10 – 100 meters = parking lot, pond 100 – 1000 meters = park, neighborhood > 1000 meters = zip code area, drainage area Recrea2onal-‐grade accuracy??
- 17. Example of accuracy 2ers: 3 – 10 meters = GOOD 10 – 100 meters = MAYBE 100 – 1000 meters = REJECT > 1000 meters = REJECT Recrea2onal-‐grade accuracy??
- 18. 10 – 100 meters 100 – 1000 meters > 1000 meters Smartphone Accuracy
- 19. Accuracy Depends on many things: Device type Which loca2on providers enabled Wifi turned on/off Cellular provider Country
- 20. Accuracy GPS Test by ChartCross
- 21. Accuracy Depends on many things: Rural (open sky) Near a building Inside a car Downtown Indoors Higher accuracy Lower accuracy
- 23. ~33 feet/10 meters (radius) 3422 sq </314.28 sq. m
- 24. Image courtesy Google Streetview
- 28. GPS: Cold vs. Warm versus
- 29. Cold start Phone rebooted Updated phone OS Poten2al for no cached values Poten2al for large inaccuracy Has to ‘acquire’ the satellites
- 30. Cold start
- 31. Cold Start: Snapshot One-‐2me loca2on >= minimum accuracy Example: Standing indoors ~2 mins Accuracy 20 meters
- 32. Cold Start: Snapshot One-‐2me loca2on >= minimum accuracy Example: Standing indoors ~3 mins Accuracy 3 meters
- 33. Cold Start: No GPS or Wifi
- 34. Warm start Cached loca2ons available GPS has been run recently
- 35. Example: ~4 seconds Accuracy 11 meters Warm start
- 36. Warm Start: GPS + Wifi (downtown)
- 37. Warm: Accuracy can s2ll fluctuate
- 38. Warm: Accuracy can s2ll fluctuate
- 39. Warm or cold…who cares?? BaVery life User expecta2ons Leave GPS on? Cycle GPS intermiVently?
- 40. BaVery life
- 41. How to get beVer baVery life?? External baVery solu2on examples: Anker Astro Series (up to 20,000 mAh) Energizer XP Series (up to 18,000 mAh) Mophie Juice (up to 6,000 mAh)
- 42. How to get beVer baVery life??
- 43. How to get beVer accuracy?? External GPS receiver (Wifi, bluetooth, plug-‐in) Consumer examples: Garmin GLOTM Bad Elf GPS XGPS150A
- 44. How to get beVer accuracy??
- 45. How to get beVer accuracy??
- 46. HTML5 Geoloca2on Overview Limited control over GPS and baVery Cannot be minimized Can approximate loca2on w/o GPS Gets loca2on faster when used w/ Wifi Requires JavaScript development experience
- 47. Na2ve GPS Overview Fine grained control over GPS and baVery Works when minimized Requires Java development experience
- 48. Collector for ArcGIS hVp://resources.arcgis.com/en/collector/
- 49. References www.gps.gov hVp://www.andygup.net/android-‐gps/ Mastering HTML5 Geoloca2on: hVps://www.dropbox.com/s/p6940ejtncoedyq/HTML5Geoloca2on%202.pptx Mastering Android GPS: hVps://www.dropbox.com/s/0fak3oziqyaj7i6/ OSCON_MasterAndroidGeoloca2on.pptx Android GPS Test tool: hVps://github.com/Esri/android-‐gps-‐test-‐tool HTML5 Geoloca2on Test tool: hVps://github.com/Esri/html5-‐geoloca2on-‐tool-‐js
- 50. References Recrea2onal vs. Professional GPS: hVp://www.esri.com/news/arcuser/0104/rec-‐gps.html Smartphones, Tables and GPS Accuracy: hVp://blogs.esri.com/esri/arcgis/2013/07/15/smartphones-‐tablets-‐and-‐gps-‐accuracy/
- 51. Ques2ons? Andy Gup Developer Evangelist www.andygup.net github.com/andygup agup@esri.com @agup