Easiest Way To Convert SPC (US Survey Feet) To Lat Long ?

Paul,
You might try "coordinate transformation" under the "coordinate file utilities"

Corpscon has a excel spreadsheet that works well. You still have to have the core program installed but the conversions are done through the spreadsheet.

I use many different methods:

LGO

Corpscon

Coordinate Calculator

It just depends on what format I have and what I am trying to do.

SHG

I use Corpscon to do the conversions.

Found "Earth Point" It Is A Google Tool

Very cool.

I enter SPC in US Survey feet and get everything below. Then I can fly to the point, which I haven't tried yet.

Zone 3702 - Pennsylvania South
Meters US Survey Feet International Feet
X 822101.567 2697178.225 2697183.619
Y 134095.204 439944.014 439944.894

Calculated Values - based on Degrees Lat Long to seven decimal places.
Position Type State Plane - Pennsylvania South
Degrees Lat Long 40.5113285°, -075.1289514°
Degrees Minutes 40°30.67971', -075°07.73708'
Degrees Minutes Seconds 40°30'40.7825", -075°07'44.2250"
State Plane X Y (Meters) 3702 822101.567mE 134095.202mN
X Y (US Survey Feet) 3702 2697178.225ftUSE 439944.010ftUSN
X Y (International Feet) 3702 2697183.619ftE 439944.890ftN
UTM 18T 489075mE 4484520mN
MGRS 18TVK8907584520
Grid North -0.1°
Maidenhead FN20KM42MR62
GEOREF GJQL52263067

Sure beats what I have done in the past. I really wasn't looking for something like this, I merely Googled to verify the northing and easting base coordinates/

It is now a favorite.

Paul in PA

Found "Earth Point" It Is A Google Tool

In carlson set your working datum under settings, then you have a few choices .
Under Annotate label lat lon or
Export choose lat lon

Found "Earth Point" It Is A Google Tool

Not that you can use in in PA but I have been using a "Earth Point" tool that flies me to a Sec. T. R. with the section outlined. One of my favorite tools for giving rough estimate on jobs.

Found "Earth Point" It Is A Google Tool

I used the formulas I found in an NGS publication on NAD83 SPCS to program SPC to LL and LL to SPC conversions into my Casio calculator. Input and output are in US feet. It took me a couple of hours, but now I can convert a couple of points without having to launch some computer program and fuss with all the setting and so forth. I set it up for the one zone I use, but it would be easy to modify or re-create for other zones. Corpscon works best for points files.

SPC50 by Chuck Rushton

SPC50 by Chuck Rushton loaded on my HP 49g+ calculator. I seldom load Corpscon now unless I need to do a 27 conversion. Chuck's program is one of my favorites and being on a calculator is extremely portable.

EARTHPOINT WORKS IN ALL STATES

Gees!!!!
I wish I had known about all these options when I was in need of such.
When I was writing that raw file viewer program (maybe 10 years ago) someone suggested I have an option to view the points (NAD83 or 29 I think) in lat-lon. LarryP sent me a small booklet from the NCGS (North Carolina Geodetic Survey Section) which had the math I needed. It took me a couple of days to digest that before I could get accurate code working based on the various zones and scales factors - but I succeeded.
During the process I discovered an error in the math as published. Probably just a left out typo for lack of a better word. As a mathematician and programmer it makes an enormous difference to me and the user.
There is a huge difference between tan(x) and tan^-1(x) or atan(x).
Personally, I can not stand today's abbreviations of the trig functions.
eg: tan^-1 is the way I was taught but today you see atan or arctan. Those confuse me.

A few years ago while working on this website I've been dealing with I was tasked to implement a zip code radius search feature based on distances. We all use these features all the time. You know: "find me something from my zip code within 20 miles" or something like that. First I had to find the assumed central lat-lon of all the nearly 43k zip codes in my data base. I found that. Then I had to work out the math. A friend was and says "why don't you do some searches? I'm the JavaScript code is already out there." Sure enough, he found it in less than 5 minutes. I implemented it in short order and best I can it is solid with its results. On my todo list is to reverse engineer the code and write the formula behind it so I can truly understand it. Perhaps I'll do that after a quick walk to the beer store. Yesterday's boredom involved answering a question that spawned from a line in one of "The Big Bang Theory" episodes where Sheldon is questioning his sister's potential off-spring knowing (or not) whether to use an integral or differential to solve for the area under a curve. My immediate response was differentials. When I studied electronics we used differentials to compute wattages for AC currents given certain voltages which basically is the area under the curve while viewing said current on the oscilloscope. That was over 30 years ago so I questioned my memory and dug out my old calculus books.
Appears to me you can use either. However, aside from the theoretical to actually solve for a real numerical answer differentials are easier. Using integration takes lots more button pushing on the calculator. None of our calculators back then were programmable so there ya go. 😀

I recently learned about modal and non-modal and stable and semi-stable elliptic curves. To solve the area under that stuff requires double-integration and some computing power. i.e. you won't solve that in junior high algebra or trig.:-O

Call me a Grand Master Geek but that's the stuff that keeps me awake at night.
Enough of that. Time for the beer-store walk.
Later, E.

CFU
Coordinate Transformation
Follow the steps

Survey Link will do it!

and!

http://www.ngs.noaa.gov/cgi-bin/spc_getgp.prl

Later

BLHB -)