|
John P. Snyder 1926-1997
John Snyder was one of, if not the
leading authority on map projections. He was also a kind individual who personally
helped us here at Mentor Software. We will miss him greatly! Here is an
article on the life and work of John Snyder.
Take the Trivia Challenge! Answers at bottom of page
1. Who was Tralaine?
2. Who was first to record a measurement of the radius of the earth?
3. What's the difference between NAD 83 and WGS 84?
Concerned About Viruses?
So are we, even though we've never had one! At Mentor Software,
every computer is scanned on a daily basis. Files on our internet site are also
scanned by our internet provider.
Your Comments
Please...
Fill out our feedback
form. Let us know what you think about The Casual Cartographer or Mentor
Software's Products. Send us your GIS Tips, or Ask Norm a question. |
 |
| Trivia
Answers:
1. A French surveyor, circa 1100 AD
2. Eratosthenes, a hellenistic philosopher born about 275
BCE and died about 195 BCE, lived in Alexandria where he was director of the large
library. Just how accurate his geometric estimate of the earth circumference was we
don't know, because we don't know the length of the "stadion", but it was close.
Answer Provided by Wolf Roder, Dept. of Geography, U. of Cincinnati. Thanks
Wolf!
3. Very little, if anything. See Relation of
NAD 83 to WGS 84 Article |
|
|
Letter from Norm
-Inspiration
Freebie of the Month
-Unit Converter
GIS Tips
-The Ellipsoid, Spheroid, and Geoid - Part I
Ask Norm?
"When trying to convert a coordinate, I got a message saying a
file named NTV2_0.GSB could not be found. What’s wrong?"
GIS Resources
-New! Coordsys Reference .txt file
-More Links
Products
Do you have the latest release?
Download the update.exe file.
-Tralaine 4.14 8/18/98
-Multric 14.04 8/10/98
-Hawkeye 14.13 7/14/98
-TralaineDLL 8.01 08/0198 |
