Flat Earth Map Grid Translation

Hmm, this could turn into a debate, but probably only amongst flat Earthers.

I would like to know how to represent a map grid on a flat Earth circular disc model.

Is the -90 degree line of Latitude (the point of the South Pole) now a big circle around the edge of the disc?

Is the equator still in the middle?

Is the tropic of Cancer and Capricorn in the expected, evenly spaced locations?

Hmm, this could turn into a debate, but probably only amongst flat Earthers.

I would like to know how to represent a map grid on a flat Earth circular disc model.

Is the -90 degree line of Latitude (the point of the South Pole) now a big circle around the edge of the disc?

Is the equator still in the middle?

Is the tropic of Cancer and Capricorn in the expected, evenly spaced locations?

Did you read the FAQ or the Wiki?

Yes, and I've seen two well prepared maps, and a diagram of the Sun's movement.

It seems your group can only agree on lines of longitude.

I am in the process of preparing a GPS App for Apple's App Store distribution.
I thought it would be cool to include a mode that shows something of a Flat Earth model,
no matter how ridiculous I think the whole idea is.
This is extremely difficult without agreeable facts.

With regard to the implementation,
It's as easy as getting the "correct" information about how to translate lines of latitude.

Ah, GPS. There's part of your problem.

Ah, GPS. There's part of your problem.

I am not sure what you think his problem is.  Could you be more explicit?

Quote from: muggsybogues1 on March 21, 2013, 06:12:52 AM

Ah, GPS. There's part of your problem.

I am not sure what you think his problem is.  Could you be more explicit?

GPS is based on satellites.

and as of yet satellites have been proven to exist. so where is the problem?

and as of yet satellites have been proven to exist. so where is the problem?

Incorrect.

i wont derail this thread any further but as of yet no FEr has a answer for this. until someone can answer this we can assume that satellites do in fact exist.
http://www.theflatearthsociety.org/forum/index.php/topic,57752.0.html#.UUseDRzviSo

remember that some FErs accept satellites exist even on a flat earth.

one word answers like this hardly constitute evidence of anything.

Incorrect.
[/quote]

one word answers like this hardly constitute evidence of anything.

Quote from: muggsybogues1 on March 21, 2013, 07:48:35 AM

Incorrect.

Neither do topics started by you asking the same questions that have been answered 100 times before elsewhere.

further discussions on the topic of satellites being real or not should take place on the link i provided as to not derail the thread further. and in answer to your statement. nope as far as i am aware the question regarding Doppler shift in satellite communication has not been asked before and is yet to be answered................

It doesn't matter. Let's call it a ground based receiver program then.
It plots your position accurately on a map, and you can zoom out and see the whole world,
or in the case of Google Earth, see your house.

The title of the thread should be map grid transformation, and therefore,
every shape on the grid also being transformed with the "corrected" projection,
and the user experience being that of observing another point of view,
even if only for entertainment. That's where I think the value is.

I don't think I can make anything that works without massive logical problems (surprise).
The existing program knows a lot about the spherical Earth,
and it would be impossible to make the two agree on everything.

I think ultimately you'll run into the issue of the earth not actually being flat.

Although I don't see why you couldn't roll your own here. The question really becomes, how would a GPS map of a flat earth differ from that of a round one? Latitude and Longitude are analogous in the FE models on the wiki, so other than in name, how would the two differ? Maps are 2D anyway.

If you're asking how to superimpose Latitude/Longitude coordinates on the FE models of the wiki, then you'd have to know how Tom Bishop or whoever made those models skewed the original images, and assuming they were originally geometrically accurate maps you would simply apply the same algorithm to the coordinate matrix and images used in the GPS to interpolate a location from coordinates.

You should be able to do this on the fly using the GPU's matrix manipulation API (I don't know what they're called in android/ios, it's been a while, but they're built for matrix ops and should be able to do it quickly enough).

Does that make sense?