29-03-2019, 06:57 PM
Thanks to JKP for pointing out, in a recent blog post Method in Medieval Maps, this map from
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![[Image: PalLat1368Map.png]](https://voynichportal.com/wp-content/uploads/2018/10/PalLat1368Map.png)
There are a couple other maps as well.
My favourite page is a listing of cities along with latitudes and longitudes.
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This manuscript includes a range of content from 1426 to 1522. I saw 1473 on one of the pages but dont know which items are from which periods.
Declination in astronomy is comparable to geographic latitude, projected onto the celestial sphere, and hour angle is likewise comparable to longitude (wiki)
Calculate declination by starting from the ascending node of the ecliptic and measure the angle of the object above that point. Calculate hour angle from the same point, but measure around the edge of the equatorial circle instead of the angle above it.
![[Image: 710px-Orbit1.svg.png]](https://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Orbit1.svg/710px-Orbit1.svg.png)
![[Image: purse76v.png?w=345&h=309]](https://voynichviews.files.wordpress.com/2019/02/purse76v.png?w=345&h=309)
![[Image: Table-containing-the-movement-of-the-cap...y-Laud.png]](https://www.researchgate.net/profile/Anne_Robertson6/publication/249988267/figure/fig14/AS:652949005029378@1532686582666/Table-containing-the-movement-of-the-caput-draconis-Oxford-Bodleian-Library-Laud.png)
The table shown above captures the movement of this point through time, not from this manuscript but i am looking for others to compare their structure, to see if any of them jive with the structure of any of the vms text.
I include the pic from You are not allowed to view links. Register or Login to view. because that is what i think it represents, the spindel symbol turns on a straight axis (ie acts like a sounding line to form a perpendicular reference to the ground, and represents time, distance and here, longitude. The caput draconis symbol sits on an angle near the spindel's equator, and represents latitude. I still like Vviews' purse idea because it represents something you would take on a journey, as opposed to something you would use at home, and you would need the tools of navigation with you on the journey at hand, where better to keep them? A marine sandglass, perhaps. Something to meausure the angular aspects of the moon, planets, or stars, and tables, charts, or volvelles to correlate them.
Part 2 of this manuscript is, coincidently, a bunch of volvelles. My favourite is this one, which includes calculations for caput draconis, or the ascending node of the moon.
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From this info i can see how a coordinate system might have worked at an early date (regardless of the date of this particular manuscript) to arrive at coordinates for comparative placement. Things like records of timing of eclipses, or bringing hourglasses along during east or west trips and noting the difference in time based on initial calculated time at the first location plus hourglass time vs calculated time at the destination could be used to generate comparative longitudes.
Combined with local distances and directions, the compilation and plotting of data would result in a reasonable depiction of reality.
You are not allowed to view links. Register or Login to view. and annotating it
There are a couple other maps as well.
My favourite page is a listing of cities along with latitudes and longitudes.
You are not allowed to view links. Register or Login to view.
This manuscript includes a range of content from 1426 to 1522. I saw 1473 on one of the pages but dont know which items are from which periods.
Declination in astronomy is comparable to geographic latitude, projected onto the celestial sphere, and hour angle is likewise comparable to longitude (wiki)
Calculate declination by starting from the ascending node of the ecliptic and measure the angle of the object above that point. Calculate hour angle from the same point, but measure around the edge of the equatorial circle instead of the angle above it.
The table shown above captures the movement of this point through time, not from this manuscript but i am looking for others to compare their structure, to see if any of them jive with the structure of any of the vms text.
I include the pic from You are not allowed to view links. Register or Login to view. because that is what i think it represents, the spindel symbol turns on a straight axis (ie acts like a sounding line to form a perpendicular reference to the ground, and represents time, distance and here, longitude. The caput draconis symbol sits on an angle near the spindel's equator, and represents latitude. I still like Vviews' purse idea because it represents something you would take on a journey, as opposed to something you would use at home, and you would need the tools of navigation with you on the journey at hand, where better to keep them? A marine sandglass, perhaps. Something to meausure the angular aspects of the moon, planets, or stars, and tables, charts, or volvelles to correlate them.
Part 2 of this manuscript is, coincidently, a bunch of volvelles. My favourite is this one, which includes calculations for caput draconis, or the ascending node of the moon.
You are not allowed to view links. Register or Login to view.
From this info i can see how a coordinate system might have worked at an early date (regardless of the date of this particular manuscript) to arrive at coordinates for comparative placement. Things like records of timing of eclipses, or bringing hourglasses along during east or west trips and noting the difference in time based on initial calculated time at the first location plus hourglass time vs calculated time at the destination could be used to generate comparative longitudes.
Combined with local distances and directions, the compilation and plotting of data would result in a reasonable depiction of reality.