Summary

DescriptionHeraldic gurges (whirlpool) Gorges.svg	English: A heraldic whirlpool or gurges shown on a shield. This is a version of one coat of arms of the Gorges family of England. Sir Maurice Russell (2 February 1356 – 27 June 1416), a High Sheriff of Gloucestershire, was descended from this family.
Date	18 September 2011 (original upload date).
Source	Own work; vector equivalent of the former image GorgesArmsMediaevalShield.jpg.
Author	AnonMoos.
SVG development InfoField	The SVG code is valid.   This vector image was created with PostScript.

Technical details

The Archimedean spiral was generated from the following vector PostScript source code:

%!
300 396 translate -.42 .42 scale/pi 3.1415926535898 def/R 180 pi
div def/W 15 def/U 7.01 def/D 180 def/C 54 pi div def/L{/Y 0 def
0 W U 360 mul{7{dup}repeat D add cos/H exch def D add sin/G exch
def H mul R div/Q exch def G mul R div/E exch def Q C mul/x exch
def E C mul/y exch def/S G Q add H E sub div def G 0 gt G 0 eq H
-1 eq and or{/F -1 def}{/F 1 def}ifelse/A exch def A 49.294 lt A
180 gt A 196.274 lt and or{/F F neg def}if W sub dup dup dup D
add cos C mul mul R div/M exch def D add sin C mul mul R div/N
exch def W add dup dup dup D add cos C mul mul R div/O exch def D
add sin C mul mul R div/V exch def/P x M sub dup mul y N sub dup
mul add sqrt pi div def/Z x O sub dup mul y V sub dup mul add
sqrt pi div def/B S S mul 1 add sqrt def 0 eq{0 0 moveto/X D cos
Z mul def}{X Y x 1 F mul B div P mul sub y S F mul B div P mul
sub x y curveto /X x 1 F mul B div Z mul add def/Y y S F mul B
div Z mul add def}ifelse}for stroke}def L/U 6.51 def/D 0 def L
showpage
%EOF

Licensing

I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.