Getting Easting & Northing Values from geopy

I have a table full of longitude/ latitude 开发者_Go百科pairs in decimal format (e.g., -41.547, 23.456). I want to display the values in "Easting and Northing"/ UTM format. Does geopy provide a way to convert from decimal to UTM? I see in the code that it will parse UTM values, but I don't see how to get them back out and the geopy Google Group has gone the way of all things.

Nope. You need to reproject your points, and geopy isn't going to do that for you.

What you need is libgdal and some Python bindings. I always use the bindings in GeoDjango, but there are other alternatives.

EDIT: It is just a mathematical formula, but it's non-trivial. There are thousands of different ways to represent the surface of the Earth. See here for a huge but incomplete list.

There are two parts to a geographic projection of the Earth-- a coordinate system and a datum. The latter is essentially a three-dimensional model of the planet. When you say you want to convert latitude/longitude points to UTM values, you're missing a couple of pieces of the puzzle.

Let's assume that your lat/long points are based on the WGS84 datum, because that's a pretty common standard for lat/long points these days. You want to convert those points to a UTM coordinate system. But to which UTM coordinate system? There are 60 of them.

I think I may have over-complicated things. All I wanted was the dms values (so 42.519540, -70.896716 becomes 42º31'10.34" N 70º53'48.18" W). You can get this by creating a geopy point object with your long and lat, then calling format(). However, as of this writing, format() is broken and requires the patch here.