Merge pull request maxmind#34 from maxmind/greg/coordinates-doc-update

Add location usage warnings

Author: oalders

README.rst

@@ -35,6 +35,13 @@ install the `libmaxminddb C API <https://github.com/maxmind/libmaxminddb>`_.
 Please `see the instructions distributed with it
 <https://github.com/maxmind/libmaxminddb/blob/master/README.md>`_.
 
+IP Geolocation Usage
+--------------------
+
+IP geolocation is inherently imprecise. Locations are often near the center of
+the population. Any location provided by a GeoIP2 database or web service
+should not be used to identify a particular address or household.
+
 Usage
 -----
 

geoip2/records.py

@@ -267,14 +267,19 @@ class Location(Record):
 
     .. attribute:: latitude
 
-      The latitude of the location as a floating point number.
+      The approximate latitude of the location associated with the IP
+      address. This value is not precise and should not be used to identify a
+      particular address or household. This attribute is returned by all end
+      points and location databases except Country.
 
       :type: float
 
     .. attribute:: longitude
 
-      The longitude of the location as a
-      floating point number.
+      The approximate longitude of the location associated with the IP
+      address. This value is not precise and should not be used to identify a
+      particular address or household. This attribute is returned by all end
+      points and location databases except Country.
 
       :type: float