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Pelatihan : Techniques in Active Tectonic Study Juni 20-Juli 2, 2013

Pelatihan : Techniques in Active Tectonic Study Juni 20-Juli 2, 2013 Instruktur: Prof. J Ramon Arrowsmith (JRA) Dari Arizona State University (ASU) - US. Tempat Pelaksanaan:

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Pelatihan : Techniques in Active Tectonic Study Juni 20-Juli 2, 2013

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  1. Pelatihan : Techniques in Active Tectonic Study Juni 20-Juli 2, 2013 Instruktur: Prof. J Ramon Arrowsmith (JRA) Dari Arizona State University (ASU) - US Tempat Pelaksanaan: Ruang Pangea, Laboratorium Gempabumi (LabEarth) – Puslit Geoteknologi LIPI dan Kuliah lapangan akan dilakukan disekitar Sesar Lembang, Jawa Barat. * Lebih jelas baca TOR/KAK dan daftar acara

  2. High resolution topography exercise and discussion

  3. Airborne Laser Swath Mapping (ALSM) Laser scanner Inertial Measurement Unit (IMU) GPS -Phillips, UNAVCO

  4. R. Haugerud, U.S.G.S ALSM workflow: Survey->Process->Classify->Interpolate/Grid->Analyze Gridded products Geodesy and signal processing D. Harding, NASA Point Cloud xn, yn, zn, in Answer science question

  5. Ecology Applications: • 3D vegetation information & interactions between vegetation and topography • 3D vegetation structure: • estimation of stand height • total aboveground biomass • foliage biomass • basal area • tree density, • canopy base height • canopy bulk density Stoker et al., 2006

  6. Comparisons of Techniques for measuring surfaces and detecting changes in surfaces* * Ball park numbers for typical applications -Phillips, Meertens, and Jackson, UNAVCO

  7. LiDAR “point cloud” • x,y,z + attributes • Filtering algorithms allow classification by return type: • Ground, vegetation, building …

  8. Digital Elevation Models • Digital representation of topography / terrain • “Raster” format – a grid of squares or “pixels” • Continuous surface where Z (elevation) is estimated on a regular X,Y grid • “2.5D” Source: http://www.ncgia.ucsb.edu/giscc/extra/e001/e001.html • Grid resolution is defined by the size in the horizontal dimension of the pixel • 1 meter DEM has pixels 1 m x 1m assigned a single elevation value.

  9. 1 meter grid • LiDAR returns from EarthScope data collection • Example from flat area with little or no vegetation so ground is sampled approx. 5+ times per square meter • How do we best fit a continuous surface to these points? • Ultimately wish to represent irregularly sampled data on a regularized grid. 1 meter 1 meter

  10. http://www.opentopography.org Facilitate community access to high-resolution, Earth science-oriented, topography data, and related tools and resources.

  11. Let’s tour OpenTopography

  12. http://rapidlasso.com/

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