Site Plans

Donald Kenney (donaldkenney@gmail.com)
Last Update: Tue Sep 15 19:50:30 2009


Plans

V0910 of website

(Sep 2009) I've had a chance to look much more closely at the location data. And it's not a pretty picture. A sampling of a few hundred locations leads me to believe that quite a few of the locations that I got by automated searches using various web sites are pretty bad. So, I think I will approach this differently than I had planned. For the next version, I will add the traditional 450 sites and do some basic clean up on the fossils found field. Then, commencing in January 2010, I will review each and every entry in the data base, combine duplicate entries and get the locations as correct as I am going to get them. I reckon that will take two or more years. Then, and only then will I come back to the fossils found data.

I did accomplish some things though:

Here's a summary of the state of location data as of mid-September 2009:

14593 sites in list 3473 sites without position
11032 sites with latlong 0 sites with ddmmss format
754 sites with PLSS/DLS positions 0 sites with only PLSS/DLSS positions
0 unconvertable locations 0 short entries
4 UTM locations 97 Dubious locations
0 Probably reversed locations 85 Unknown locations
0 Truncated Lat/Long 0 Unresolved locations
0 Positive longitudes

Approximate accuracy of Longitude for various precision of degrees (Latitude will be 25-50% more accurate)

Number of fractional digits Accuracy (meters) Accuracy (feet)
1 11.112km 6.9047mi
2 1.111km 3646ft
3 111m 364.6ft
4 11.1m 36.5ft
  1. The accuracy of Longitude is roughly the value above multiplied times the cosine of Latitude.

  2. Some sources give positions to 5, 6 or more fractional digits. I suspect that the positions encountered in day to day map work without surveying are rarely accurate to four digits.

    A code in the form of GA0 through GA5 is provided with my guess as to the actual accuracy of the positions

GA0 Very likely dead on. Go there and look around
GA1 Probably within a few minutes walk
GA2 Probably within 2 or 3 km
GA3 Probably within 10 km
GA4 Probably within 50-60 km
GA5 Very likely on the correct planet

Other than the position information, I've added an article on the Triassic Basins of the North American Atlantic margin

V0907 of website

(Jun2009) It'll be another two years before readers will see much change to the fossil sites other than (I hope) the addition of 450 new sites every quarter. There a number of major things yet to be done before I start consolidating and reorganizing the data:


V0807 of website

More Distant Future