Common Tasks/id

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< Common Tasks
Revision as of 06:17, 4 October 2008 by Firmanhadi (talk | contribs) (New page: {{Trans|Bahasa Indonesia}} <h1> Mini-tutorials showcasing some common GIS taks </h1> == Import/Export and Display == * Import and display SRTM elevation data : ''r.in.srtm'' :* ''[http:/...)

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This page is in progress of translating to Bahasa Indonesia.

Mini-tutorials showcasing some common GIS taks

Import/Export and Display

  • Import and display SRTM elevation data
r.in.srtm
  • Import and display VMap0 Digital Chart of the World
v.in.ogr
  • GRASS Newsletter, 3, June 2005.
  • If your region crosses the boundaries of a VMap0 block you can use the v.append command, available in the Grass addons section of this wiki, to combine vectors across the edges. It can take quite a while to complete.
  • Import and display ETOPO2 world elevation and bathymetry dataset
r.in.bin

General Import / Export

  • Raster import and export with r.in.gdal / r.out.gdal
    • r.in.gdal misc. tips
    • r.out.gdal data types, creation options, new flags
  • Vector import and export with v.in.org / v.out.ogr
    • v.in.ogr misc. tips, shapefile gotchas
    • v.out.ogr data types, dsn, new flags

GIS Tasks

  • Map (re-)projection
    • r.proj and v.proj (snippets from manual pages)
    • gdal_warp as an alternative for large, complex (re-)projection tasks
    • ogr2ogr as an alternative to v.proj
  • Create a DEM from contour lines and trig points
    • r.surf.contour
  • Create a DEM from x,y,z point data
    • v.surf.rst
    • v.surf.idw
    • v.surf.bspline
    • r.surf.nnbathy
  • Create vector contour lines from a raster DEM
    • r.contour

3D Visualization

  • Use NVIZ to render a 3D image
nviz elevation.dem
  • Use NVIZ to make a fly through movie
  • Use Paraview to render a 3D image
    • r.out.vtk, v.out.vtk

Raster operations

Creation

  • slope, aspect and surface parameters
    • r.slope.aspect
    • r.param.scale
  • Create a shaded relief map
    • r.shaded relief
  • drape semi-transparent land use map over shaded relief map
    • d.his

Analysis

  • cost surface analysis
    • r.cost
    • r.drain (fun examples)
    • r.walk (fun examples) [how output is different]

Vector operations

  • Disolve interior lines
    • v.dissolve

Hardcopy and Presention Graphics Creation

  • Create a high quality hardcopy plot
    • Creating PostScript with ps.map
    • export to GMT