I tried to post a reply but apparently have not yet been successful. What gives?

Andy, It is not every day one needs to traverse a parallel of latitude - but it can be done with the right tools. And, it appears you are working in ...

Following is a quote from the "Introduction" to chapter 5, in "The 3-D Global Spatial Data Model" written by me and published by CRC Press in 2008. "G...

I really appreciate the insights and assistance. On an intuitive level I feel somewhat comfortable but when it comes to those specific mathematical fo...

I had access to Star*Net in the computer lab at NMSU and really liked using it. However I am more of a novice than an expert with it.I sincerely appr...

If I need a disclaimer, the aluminum tablet was in place long before I arrived on campus.Anyway, we get very little rain here which might delay corros...

Thanks, I believe my mistake was logging off right away, then attempting to edit after logging back in. I've edited postings before but it was frustr...

OK, I give up. I've tried for 60 minutes to make two edits to the post.There should be a space following the word "Edition" and readers are asked to ...

I promised earlier to post a follow-up. This is it.I apologize for taking so long, but my distractions this week included several grandkids and a payi...

John,Thanks for the feedback. After sleeping on it and reading your posts, I'll be posting a revised summary later today. For example, I will re-com...

After reading the interesting comments of others, I just could not resist adding my two cents. See The agreement is quite impressive.

Mr. Penry,That is a fascinating post - lots of historical significance. I read the associated article and have questions - I'll contact you through y...

EWWW - smells good if you are willing to learn some history.Why would anyone mess with existing fraction - for short history see link.

Upon reading the post I realized I should have stated that grid bearings ARE different by exactly 180 degrees.I tried to "edit" the post but forget ho...

This is another thread to be archived (remember, I'm gathering material for the second edition of my 3-D book). The original post is legitimate and m...

Shawn,Go to item #19 at the list of articles. Or, buy and read the book (but all the information is posted on-line.There are no secrets, there is no ...

This is an interesting topic/thread - lots of ideas are floated some good and some not so good. Good or bad, I invite serious consideration of the fo...

I'm not so sure the "grid" has a heightI believe Dave is on to something here. Consider: 1. There is a difference between a graphical projection and ...