SFREC

Draft SFREC elevation model

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

viewed from the north-west

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

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.

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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