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Multi-modal exploration of rugged digital terrain on mobile devices

Antoni Moore, School of Surveying Mariusz Nowostawski, Department of Information Science . Multi-modal exploration of rugged digital terrain on mobile devices. Overview. Mobile devices are becoming dominant in digital map display (tablets too)

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Multi-modal exploration of rugged digital terrain on mobile devices

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  1. Antoni Moore, School of Surveying Mariusz Nowostawski, Department of Information Science Multi-modal exploration of rugged digital terrain on mobile devices

  2. Overview • Mobile devices are becoming dominant in digital map display (tablets too) • Challenges of small map display, storage / processing limitations • Dominance of Google Maps / Earth Presented at ICA Mountain Cartography Workshop, Taurewa NZ, 1st – 5th September 2012

  3. What about terrain? Presented at ICA Mountain Cartography Workshop, Taurewa NZ, 1st – 5th September 2012

  4. What do they not communicate? • The look of a surface? • The feel of a surface? • Really? Presented at ICA Mountain Cartography Workshop, Taurewa NZ, 1st – 5th September 2012

  5. Rolling ball examples Presented at ICA Mountain Cartography Workshop, Taurewa NZ, 1st – 5th September 2012

  6. What about balls? • Actively engaged with the data • “Energy” spent to roll the ball • Gravity, momentum, force • Sense of presence • A spherical avatar • Haptic (and sound) feedback Griffin, 2002 Presented at ICA Mountain Cartography Workshop, Taurewa NZ, 1st – 5th September 2012

  7. Minimal Requirements Graphics • OpenGL ES 2.0 (graphics language) provides direct access to vertex and fragment shaders Sensors • Accelerometer / Gyroscope • Magnetic sensor supported on modern Android/iOSsmartphone & tablets Presented at ICA Mountain Cartography Workshop, Taurewa NZ, 1st – 5th September 2012

  8. Development environment: software and hardware • Android HTC Desire (2.3.7) • Galaxy Nexus (4.1.1) • Eclipse • Android SDK and NDK • GitHub version control (public version coming soon) Presented at ICA Mountain Cartography Workshop, Taurewa NZ, 1st – 5th September 2012

  9. Architecture Diagram Presented at ICA Mountain Cartography Workshop, Taurewa NZ, 1st – 5th September 2012

  10. What goes on behind the scene • Sensors feed data to the scene manager (C++) • Scene Manager • prepares the scene objects • sets data for renderer in OpenGL rendering engine • Renderer (mixed C and C++ code and Graphical Library Shader Language, GLSL) • Dynamically binds vertex and fragment shaders • renders the scene with a given perspective and lighting arrangements • Processors internally perform • matrix manipulation, matrix algebra and geometry manipulation to create the scene out of triangles. • Lighting setup is already provided. • Application is managed from Java through Android Activity, which sets the initial graphical context • Textures and additional effects currently under development. Presented at ICA Mountain Cartography Workshop, Taurewa NZ, 1st – 5th September 2012

  11. Screen shots Presented at ICA Mountain Cartography Workshop, Taurewa NZ, 1st – 5th September 2012

  12. Data Presented at ICA Mountain Cartography Workshop, Taurewa NZ, 1st – 5th September 2012

  13. Summary • Richness of elevation not communicated? • TerrainBall is tilting / twisting the terrain (the device) to roll the ball • Haptic feedback to add to the visual • Future testing on usability • Where would you use this? • Learning of terrain data – retention enhanced? (outdoor types, kids) • Adding game like elements? Presented at ICA Mountain Cartography Workshop, Taurewa NZ, 1st – 5th September 2012

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