Archaeogeodesy News
2015.01.17  On a continental scale, three of the greatest monumental sites in the ancient Americas precisely express the ratio of a fundamental astronomical constant, the number of lunar orbits per earth rotation. In this case the ratio expressed is lunar orbit per ten rotations (illustrated below, click image for larger view). With the ten times multiple, the two arcs provide scales nearly 2,400 and over 6,500 kilometers long with a five meter inaccuracy in relation to the precise constant. The centeroncenter arc inaccuracy is about the same as the inaccuracy in the method determining the monument centerpoint coordinates, and is minute in relation to the scale of the monuments.
Comparing monuments on a global scale, I employ centerpoint coordinates. Substituting either of the Tikal Great Plaza pyramid coordinates for Tikal Plaza (their midpoint) shifts the 2,400 kilometer arc 10 meters in either direction. Relative to the precise astronomical ratio, at Tikal Pyramid II the Cahokia arc is six meters long compared to 16 meters short at Tikal Pyramid I.
Examine the monument coordinates and site relationships closeup in Google Earth: cahokia_3650.kml
With an interesting addition, the lunar orbit per ten rotations ratio repeats in the relationship of three major monuments in the Andes; Pachacamac, Sechin Alto, and Marcahuamachuco. At Marcahuamacucho's Castillo complex the arcs to Sechin Alto and Pachacamac expresses the same lunar orbits per rotation ratio (arcs ratio @ marcc = 1.0 : 0.36500). The interesting addition, at Marcahuamacucho's Monjas complex the arcs to Sechin Alto and Pachacamac express the lunar orbits per day constant (arcs ratio @ marcm = 1.0 : 0.36600).
lunar orbit per rotation (lr) = 0.0365011
lunar orbit per day (ld) = 0.0366010
In 365 lunar orbits there are 10,000 rotations. In 366 lunar orbits there are 10,000 days. 
Annoted in the graphic above, the TikalTiwanaku relationship (the same two coordinates tikgppupup) also expresses the ratio of eclipse nodal intervals per lunar orbit turn (et), again a precise ratio. The NewarkPachacamac relationship redundantly expresses the et constant, as illustrated below and discussed previously in Newark Archaeogeodesy. The Pachacamac to Newark Circles mean arc (pachsnoccncec) also equals four times lunar orbit per rotation (r27), in other words four times 0.036501 circumference, yet another redundancy for this fundamental, readilyobservable astronomical ratio. For more on the importance of lunar motion per rotation, see Eclipses, Cosmic Clockwork of the Ancients.
Updated Applet
An updated archaeogeodesy.xls v2015 is online, with the site variables set to the finding discussed. The applet provides ancient astronomy research functions and calculates arc distances and bearings for
three sites, ratios of arcs, latitude, and longitude, and more. The thousands of site coordinates for mounds,
pyramids, and other monuments worldwide include hundreds of newly documented Amazon geoglyphs.
Emperor Qin and the Golden Mean
2015.01.14  I recently focused on the ancient pyramids in East Asia, including Emperor Qin's mausoleum. The massive Qin Shi Huang pyramid was also a focus of my latitude study. Several new files illustrate the findings. While not as precise as the latitude placements of Chavin (asin 1/6) and Monk's Mound (atan 4/5), or the nodal to anomalistic colatitude ratio of the Octagon and Capitolium, the Qin monument does overlap two significant latitudes, the golden mean between the equator and the pole along with threefifths of a radian from the equator. Will these baselines inform locating the actual tomb? Examine the details in a new Google Earth file, qin.kml.
At the Qin Shi Huang pyramid, the latitude equals 0.600067 radians and the colatitude to latitude ratio is 1.0 : 0.61816. The two baselines transect the pyramid field north of Xian, passing just north of the Yan Ling Pyramid (yalip, latitude = 0.59996 radians, = 0.61806 colatitude). At the phi baseline, the ratio of distance to the pole and to the equator is one to phi (1.0 : 1.618034 = 0.618034 : 1.0). This equals the ratio at the pole of the distance to the equator and to the baseline, thus the golden mean (φ = 1.6180340). Two arcs are a golden ratio if their proportions equal the ratio of their sum to the larger arc, in this case [lat : colat = colat : (lat + colat)].
The golden mean latitude of Qin's mausoleum, feng shui on a global scale. Download qin.kml.
The golden ratio latitude of Emperor Qin's mausoleum is not my first observation of this ratio for major monuments. In the Americas, I noted two phi longitude ratios for Newark Earthworks. The golden mean is accurately expressed by the longitudes of three major monuments, Pachacamac, Newark Octagon, and Poverty Point (pachsnocppopma ew @ pachs = 1.0 : 0.61801,
ew @ nocp = 1.0 : 0.61810) and repeats for the longitude differences between Newark Circle, Chavin, and Tiwanaku (ncecchhhapupup ew @ chhha = 1.0 : 0.61811, ew @ pupup = 1.0 : 0.61801).
Download the Google Earth placemarks file:
golden_ratios.kml
The distances from Newark and Chavin to their respective opposite poles only approximates the golden ratio, while their relationship with Pachacamac presents a very accurate astronomy ratio (as previously discussed). Here follows a new graphic illustrating the arc (click to enlarge).
A permalinked page with further discussion and other sitetosite results will follow. For now, I wanted to start the 2015 blog in order to post new and updated files and to report these findings—the tip of an iceberg. More: Ancient Monument Latitudes Evidence Accurate Astronomy
Newark Archaeogeodesy 
Assessing Evidence of Geospatial Intelligence in the Americas
Updates
2015.01.06  Hundreds of Geoglifos Discovered in the
Amazon article updated with newly discovered geoglyphs. Nearly 400 Amazon geoglyphs are now surveyed. All the visible lines and the largest earthworks are outlined. I continue to monitor Google Earth imagery updates.
Previous Years Linked Below.
