From 529d41e3edbf5c1ca626221acb293d9d793ed3d1 Mon Sep 17 00:00:00 2001
From: Eric Xanderson <disarticulate@gmail.com>
Date: Sun, 24 Apr 2016 11:17:39 -0500
Subject: [PATCH] Clarified map_coords

It's unclear to me that the map_coords function only results in applying a function to the individual dimensions of the tuple. This works well for basic scalling, but if you scale arbitrarily, you lose a lot of the 'geo' part of json, which is the geometric center issue.

I've also added a worked example of transforming coords in another pull request with the same scaffold of list comprehension.
---
 geojson/utils.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/geojson/utils.py b/geojson/utils.py
index 5dbf272..15ff320 100644
--- a/geojson/utils.py
+++ b/geojson/utils.py
@@ -27,15 +27,16 @@ def coords(obj):
 
 def map_coords(func, obj):
     """
-    Returns the coordinates from a Geometry after applying the provided
-    function to the tuples.
+    Returns the mapped coordinates from a Geometry after applying the provided
+    function to each dimension in tuples list (ie, linear scaling).
 
     :param func: Function to apply to tuples
     :type func: function
     :param obj: A geometry or feature to extract the coordinates from.
     :type obj: Point, LineString, MultiPoint, MultiLineString, Polygon,
     MultiPolygon
-    :return: The result of applying the function to each coordinate array.
+    :return: The result of applying the function to each dimension in the
+    array.
     :rtype: list
     :raises ValueError: if the provided object is not a Geometry.
     """