Last seen: November 17, 2024 3:10 pm
@dave-karoly Yupper yupper. Most of my career was spent in Mining Districts in the Western US, and references to the Miner's Inch were common in man...
Miner's Inch Another "variable" unit that I run into from time to time, although rarely an issue.
@dougie I always considered the word "vara" to be a variation of the term variable, and a close cousin to "it depends." 😎
Try this: ftp://ftp.ngs.noaa.gov/pub/pnt6/
@dougie It depends on which State you are in, Texas is NOT the center of the Universe, despite what some (but not all) Texans appear to believe. :d
Geoid and Velocity Models will of course continue to evolve and improve. I believe that the biggest improvement to the NSRS will be the evolution of H...
Pretty rare in my neck of the woods, but they are here (in some areas). The first time that I REALLY noticed them was around the old Winter Quarters C...
The 51?ø50' is the angle between the "centerline" @ POC 419+76.8 and the Section Line between Sections 15 & 22.
The Money Shot(s). I didn't get involved with this until my client asked about the ??spirals,? and after looking at the data, I visited the site w...
@bill93 That is certainly possible, I have also heard of that as well. Loyal
My recipe is "shaken, not stirred" 💡
Calculated Centerline to existing tracks Considering that 110 years have passed between construction and the retracement, I think this looks pretty g...
@bill93 Trivia note. This particular "route" covered 116 miles, and included 63 curves (33 w/ spirals & 30 w/o spirals). A tabulation of the sp...
@bill93 Searles (& Ives) provide both formulas and tables for laying out the Searles Spiral. I have never used them, but I'm pretty sure that's h...
@mike-marks Speaking of Highways. Here's some alignment data for US-40 (1980s) which runs through one of my projects: Thankfully, UDOT did NO...
@mike-marks Not all Railroad "spirals" are Searles Spirals (although the Searles is the most common in my area). I have also encountered the Talbot S...
@chuck-beresford I think that my first encounter with a Searles Spiral as around 1980 or so. Since then I have bumped into Searles Sprirals on dozens...
@bill93 Looks like you nailed it! “The spiral curve is constructed upon a series of equal chords, and the angle subtended by the first chord i...
@bill93 16
