WEEK 13 2011
Mon- Tue- Wed-
Picture of the Week
17 March 2002
Ago, This Week, 2002
Ago, This Week, 2003
Ago, This Week, 2006
Ago, This Week, 2007
Ago, This Week, 2008
This Week, 2009
This Week, 2010
Saturday - not feeling 100%, just hanging around mostly. I
did run some chores, returning books to the library and getting the oil
changed in the Explorer. Also had lumch with some friends.
Book #32 was Milor!,
by Thomas De Prima, book V in the A
Galaxy Unknown series.
- I worked on the boat in the morning, sanding the portside
interior paneling with 220 grid, so that I can re-varnish it. I hit the
starboard side again, the side that I gave a coat of varnish a couple
of weeks ago, with some 320 grit. I'll varnish the port side, wait four
hours or so, then re-varnish it and the starboard side at the same
time, so that they both have 2 coats of the clear polyurethane.
The overhead needs scuffing too, but I got a call from the boss and had
to head into the office in the afternoon to translate some WGS84
coordinates into NAD27 Zone5 coordinates for the draftsman.
I wasn't actually sure what the old "state plane" coordinates consisted
of, but a bit of googling showed how the concept works. Essentially you
use a virtual cone with it's apex somewhere high in space over the
north pole to project your actual spherical coordinates onto. The cone
is set to be tangent to the center of several narrow strips (7 for
California, Ventura being in Zone 5) so that the deformation isn't too
big as you move away from the tangent latitude. Once projected you can
"unroll" the cone to flat, and calculate the "easting" and "northing"
value, in feet, from one corner.
Kind of old fashioned, but for the surveyor with only a slide rule and
a pencil it was the best method available.
So, there are a couple of things going on. Firstly WGS84 to the
NAD27 ( North American Datum 1927) using the "Clarke Ellipsoid of 1866"
as it's latitude/longitude basis; and then the projection to the cone
as described above.
What I actually did to
transform the points was to import the GPS points into Manifold, then
reproject into NAD27 Zone5, and export.
Then I headed home. It took hours
longer than it should have. I always check the 101 and the 405 traffic
reports at sigalert.com
before leaving, and they were reasonable. But I haven't been checking the Fwy-14,
and it turns out that there was a fatality accident that shut down the
northbound lanes for hours, starting about 4:00pm. From about 7:30pm at
Via Princessa to about Sierra Hwy it took me nearly two hours of stop
and go traffic. The accident had long since been cleared, but the
residual congestion was terrible almost the entire way. I saw several
vehicles over on the side, probably rear-end accidents from the stop
and go, and a number of other vehicles that probably overheated.
A pretty miserable drive for me, but much worse for a number of other
Thursday 31 March 2011
- working away in Ventura.
30 March 2011
- Working away in Ventura.
Book #31 was Origins
of Life, by Freeman Dyson. Another very interesting book. Origin(s) is plural because Dyson
espouses the idea of a dual origin of life, firstly a non-exact
cellular replication stage, then a stage where DNA (or RNA) adds a near
exact replication. Interesting ideas, particularly as my rudimentary
biological science knowledge dates back to the late 1970's and a lot of
what he was talking about was new to me.
29 March 2011
- Working away in Ventura. Plans and specs for a couple of projects,
Grimes and Matilija Canyons, mostly.
28 March 2011
- I've been wearing a prosthetic, a boot like device, one that keeps my
ankle from bending. I keep mildly re-aggravating the Achilles tendon,
and this should help prevent that. In the morning I almost forget that
it's on, but by evening I am so ready
to get the damn thing off!
27 March 2011
- Books so far, this year:
Book #30 was Trader
by Thomas dePrima. This was the fourth book in the series, and, you
know, sometimes I hate myself for not being able to stop reading