$ diff -urN earthdistance.sgml.orig earthdistance.sgml
--- earthdistance.sgml.orig 2019-01-29 00:59:46.066302968 +0900
+++ earthdistance.sgml 2019-01-29 01:07:56.814501839 +0900
@@ -120,6 +120,13 @@
</entry>
</row>
<row>
+ <entry><function>geo_distance(point, point)</function><indexterm><primary>geo_distance</primary></indexterm></entry>
+ <entry><type>float8</type></entry>
+ <entry>Returns distance between the points in miles on earth's surface. A
+ point is composed with longitude(x) and latitude(y).
+ </entry>
+ </row>
+ <row>
<entry><function>earth_box(earth, float8)</function><indexterm><primary>earth_box</primary></indexterm></entry>
<entry><type>cube</type></entry>
<entry>Returns a box suitable for an indexed search using the cube