[Icelander]

Originally Posted by Polydamas

Its free, they have not spammed me, and you can just type in decimal latitude and longitude to mark a location. You have to click on points by hand to draw a polygon and it does not show all the modern cities by default but you can strip the lat and long for all the archaeological sites off Wikipedia (its in the upper right corner of the article on a full-sized screen, here is Mojendo-Daro).

Cool, thanks. I'll sign up and try.

Originally Posted by Polydamas

In the first linked map there are 5 vortices per hemisphere, occupying about 1/4 of the line of longitude, so each is 18 degrees wide (360 / 5 * 4). So the vertices for northern vortices on that map are {lat X degrees North, long Y-9 degrees East} {lat x+9 degrees North, long y+9 degrees East} {lat x-9 degrees north, long y+9 degrees north} But no crazy theory is complete without multiple variations! Wikipedia has a version where the vortices are defined by two lines of latitude and two of longitude so you would need four points each 15-18 degrees apart.

Well, I'm pretty sure that I don't want major effects extending into too much of the huge cities in the area. I'm prepared to swallow as much rural Pakistan and Afghanistan as possible, even a bit of India and Iran if necessary, and I don't mind miles and miles of the Arabian Sea fitting into the lozenge shape either, but I should probably avoid such cities as Lahore, New Delhi, Mumbai and the like, unless I absolutely can't get the effect I want (and then I should be selective with the cities included).

Originally Posted by Polydamas

Here is an example of such a map on Stepmap.

This is pretty much Pakistan, more or less as a whole, with not much of other countries included, no?

Slight bit of Iran, a touch of Afghan border.

I'm not wedded to Mohendo-daro being in the real center, just that it was arguably the epicenter of one conception.

What I want seems to be a slightly smaller triangle, shifted a bit west to swallow a good part of Afghanistan, and another triangle added to the south, so it forms a lozenge (and gets me Arabian Sea goodies).