Real time Mobile GIS For Transportation

Transcription

1 Real time Mobile GIS For Transportation MATT VON WAHLDE GEONETICS, INC BOSTON, MA Boston, MA

2 Introduction Matt von Wahlde Chief Operating Officer, Geonetics, Inc. Custom Application Development Services Highlight recent realtime inventory system created for MassDOT Presentation geared towards managers wanting to understand issues involved with implementing a large scale mobile field data collection effort

3 Overview What is Real time mobile? ADA Compliance System Example Mobile Platform Selection GIS Mobile Technology Transportation Issues Data Collection and Quality Control Practical Real World Issues Summary

4 What is Real time Mobile? Mobile Device connected to central server(s) Data Updates (not just reading) Allows managers to see changes as they occur in field Alllow instant feedback and guidance to field crews

5 ADA Compliance System Wheelchair Ramp Inventory System Custom Developed Mobile System for MassDOT 8000 miles of jurisdictional roadway Over 100,000 wheelchair ramps Mobile data collection Intersections Mid block Sidewalks

6 Architecture Server hosted on Amazon Web Services Android mobile platform ArcGIS Server GIS platform Linear Referencing system integration Web based management console Automated Scoring and prioritizations system Planning Functions Built in Quality Control Mechanisms

7 Mobile Component Tablet Data Collection Need screen real estate for mapping and data entry

8 Mobile Module Data Validation Dynamic Question Questions based on ramp types

9 Web Management Console Main tool used by managers to plan, supervise, and Quality control work effort Manage Teams Modify data model and business rules for push to tablets

10 Web Management Console Planning Surveys Monitoring survey effort realtime Data Quality control

11 Planning Functions Only need to survey jurisdictional (managed part of route system) Lot of complexity and discontinuous routes

12 Reportcard Module Automated Scoring Reporting and Analysis

13 Google Glass Integration System Currently being integrated with google glass Allows wearer to look at a ramp and get condition information

14 Business Case for RealTime Mobile GIS Field based data collection is tricky Lots of pitfalls and challenges Large geographic areas Multiple teams Quality Control Planning Change management/updates

15 Uses for Realtime Mobile Asset Data Collection Emergency Response Environmental Monitoring Construction Monitoring Many, many others Types of data collection

16 Non-Realtime Mobile Typical method for field data collection Collect data offline Sync later Makes tablet application simpler Data syncing can be problematic No ability to see data as it is collected

17 Realtime cost/benefit More complexity Value depends on how useful it is to have instant access to data collected.

18 Realtime vs. standard mobile Realtime Work performed in the field immediately viewable in office or internet Complex workflows and data entry requirements Interaction with other users Interaction with backend data sources Interaction GIS data Traditionally, data collected on mobile device and synced back at office

19 Mobile Platform Android vs. Apple Costs issues Usability Maps can be very hard to read in sunlight Breakage Power management Training Tablet v.s. Handheld form factors

20 Technology HTML vs. Native Platforms HTML Benefits Native Benefits

21 GIS Platforms Google ESRI Apple Open Street Maps No Free lunch, All have hidden costs and licensing issues. Need to investigate carefully We use multiple GIS API to get best of all worlds!

22 Mobile GIS Nutiteq OpenGIS WMS Mapbox CartoDB Offline maps

23 Mobile Data Map Caching Mobile maps Offline mapping Need efficient tools to generate caches and deliver to mobile devices Local GIS Data GML Sqlite/Spatiallite

24 Connectivity Can t always rely on internet connectivity Rural Areas Costs of Broadband data access Performance varies widely Modern phones and tablets generate very large image sizes

25 Data Syncing Because of connectivity limits, need to have mechanisms to push, pull data to and from mobile device Many ways to implement Not easy to implement Two way data syncing Use commercial data syncing platform like google drive/dropbox Requires server process and mobile parsing of data updates

26 Realtime GIS Issues Road Network Updates Map Tiles vs. Geometry Linear Referencing system integration limitations Map updates Road Network updates

27 Georeferencing on Mobile GPS accuracy Built-in vs. External Good for general location find me feature Use road geometry to snap to closest road segment Using user placed points Drawing Polygons, complex editing Can t do accurate drawing on mobile devices, even with stylus

28 Updates/Change Management Software updates Reference data updates Side loading vs. app stores

29 Planning and Administration Large Scale Survey Effort With Large road network, planning is essential Need tools to administer users and teams of users Scheduling tools and charts

30 Quality Control Quality control needs to considered at the outset of any field data collection effort Develop a written data quality plan Roles and responsibilities Software needs to have Quality Control Mode

31 Local Data Storage SQLite is the de facto standard for mobile field data collection Spatialite extension for Android Good for larger datasets (vs. GML) where local processing is requried. Fast indexed tables Developers access data via SQL language No stored procedures XML not suitable for complex data or high performance.

32 Matt s Pick s Mobile Hardware Platform: ipad Development platform: Android GIS API: ArcGIS Android/iOS

33 Summary & Questions Properly implemented, Real time Mobile GIS applications allow large numbers of field users to collect data that can be instantly reviewed by small number of manager Planning and coordination of work efforts should be supported by the system and process Technology changes quickly, need to have sophisticated capability to manage these changes Sophisticated mechanisms for handling intermittent internet connectivity are essential Incorporate Quality Control into the project at the beginning