This page shows the Da Vinci Star geometry applied to a map of Mahone Bay, Nova Scotia, Canada.
The centerlines of the two stars converge precisely at the Oak Island treasure pit location and the left leg point of the large Star is in the middle of the round tip of Rose Point. For that point of land to have been named Rose Point, there almost certainly must have been roses growing there (I haven't investigated the area myself). Roses, particularly the Dog Rose, were commonly associated with the planet Venus (in ancient times). They are also associated with the Virgin Mary, which may or may not be significant in this case. My guess is that they were planted by the depositors of the treasure as a clue that a star shaped figure is involved, Venus being known as the Morning Star.
Below is a version of the above map with an overlay of a satellite image of the same area. This shows that the map is very accurate and it also shows how the surrounding bedrock, not shown in the map itself, of one of the points of land extends toward the top of the small Star.
I redrew the geometry into the satellite/map overlay, so it may not be positioned exactly the same as in the first image. Obviously, the star geometry could be placed as far away from the Money Pit site as you want and still have the two centerlines converging there. All that would change is the size of the stars and their distance from the Pit. The farther away you position them, the larger they become. The limiting factor is that the left leg of the large star must actually touch the relatively small tip of Rose Point while the right arms of both stars are touching Duck Island. This narrows the position down to a very small margin of variability.
Since the only land anywhere close to the convergence point of the two stars under those conditions is the east end of Oak Island, it would then have been an easy matter for someone to look around that small land area until they noticed a huge oak tree with a limb cut off, strange markings carved into its trunk and a 13 foot diameter circular depression right next to it. Because the Da Vinci Star wasn't rediscovered until now, it turned out that the treasure site was already found centuries prior by simply being stumbled upon by settlers. The amazing thing is that the treasure itself was not recovered prior to the rediscovery of the Da Vinci Star. So the situation is that we now know the precise details of the great secret of the Rosicrucians, aside from what exactly is contained in the treasure.
Leonardo da Vinci is known to have mapped out at least one city with remarkable accuracy, so we know that it was possible to do in da Vinci's time period. Here is my theory on how the geometry may have been set out over the huge area in Mahone Bay to high accuracy. I'm not suggesting that da Vinci did this mapping himself, but he may have devised the methodology and had others carry it out or he may have had them give him the coordinates, obtained through this or another method, that then enabled him to produce the map. It could have been done in any of several ways but I thought of a novel method which would theoretically work. It is rather complicated to explain but here it is. Notice that there are what appear to be four kites shown in the Rosicrucian Print. Although some people interpret these figures to be representative of carrier pigeon air mail, I can't see why they would have strings attached. The men in the turrets are also holding up branches, which could be representative of some sort of sighting device.
They may simply have launched a kite when the wind was
blowing in the direction of the area they wanted to measure the
distance to and then took the measurement of how much string was
let out (compensating for any curvature of the string caused by
wind and/or gravity) and the angles of inclination of the kite
from the earth from the point where the kite flyer was standing
and from the point they wanted to measure the distance to. It was
then a simple matter to work out the distance using basic
Pythagorean mathematics in existence since about 700 BC. To get
the precise distance between the two points you took the angle
readings from as it would appear on a map, you would of course
also have to correct for the difference in elevation of the two
points. I show an illustration of this method below the satellite
image.

Here's a link to a different satellite image of Mahone Bay which shows the full geometry, rather than just the star part-Mahonestar
How would they have mapped this area out? None of the these islands and land points are more than about 50 feet high at their highest points.
A large ship can have a mast of at least 60 feet in height. It would be an easy matter to make accurate sightings from the top of those masts. For long
distance sighting, a fire could be made at the point being sighted to produce smoke.

The upright lines near the letters A and B represent sighting poles.
Poussin Seven Sacraments paintings
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