SFREC

Draft SFREC elevation model

Submitted by dylan on Wed, 2008-04-16 00:34.
Draft SFREC elevation model

viewed from the north-west

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SFREC

Submitted by dylan on Fri, 2008-04-11 06:19.

Content Here.

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RTK base station setup

Submitted by dylan on Thu, 2008-04-10 15:55.
RTK base station setup
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Regions with low point coverage

Submitted by dylan on Wed, 2008-04-09 23:21.
Regions with low point coverage

in yellow

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Vertical Precision

Submitted by dylan on Wed, 2008-04-09 23:19.
Vertical Precision

Yellow points represent vertical precisions less than 10cm, red points are for precisions greater than 10cm.

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Selection by Minimizing MAE (mean absolute error)

Submitted by dylan on Wed, 2008-04-09 23:02.
  • 5 meter interval sampling of contours
  • 5 meter interval sampling of terrain skeleton
  • [5 10 15 20 25 30 40 50 60] meter thinning (snapping) radius
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Regions of like SD(elevation)

Submitted by dylan on Wed, 2008-04-09 22:59.

 
Compute SD of elevation on 50x50 meter grid

# prepage SD map
r.neighbors in=e10 out=e10_sd method=stddev size=5 --o

 

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Percent of visible terrain obscuring the sky above 10 degrees

Submitted by dylan on Sat, 2008-03-29 17:41.
Percent of visible terrain obscuring the sky above 10 degrees
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Estimates of Local Sky Obstruction (Regions of Problematic GPS Reception)

Submitted by dylan on Thu, 2008-03-27 00:18.

 
Some possible approaches

  • r.angle.sh (see image below and attached script)
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Angle Map

Submitted by dylan on Thu, 2008-03-27 00:17.
Angle Map

Vertical angle (degrees) from starting point (yellow point) to each cell.

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