Improve some error handling. Closes #150

templates/help/accuracy.html

@@ -0,0 +1,17 @@
+{% extends "help_page.html" %}
+{% block help_content %}
+
+    <h2 id="accuracy" class="mt-4">Data Accuracy</h2>
+    <p>Please note that the data coming out of Spothole is only as good as the data going in. People mis-hear and make
+        typos when spotting callsigns all the time. There are also plenty of cases where Spothole's data, particularly
+        location data, may be inaccurate. For example, there are POTA parks that span multiple US states, countries that
+        span multiple CQ zones, portable operators with no requirement to sign /P, etc. If you are doing something where
+        accuracy is important, such as contesting, you should not rely on Spothole's data to fill in any gaps in your
+        log.</p>
+    <p>In the Spothole user interface, under "Your Data", you can enter your credentials for QRZ.com and/or HamQTH if
+        you have them. This allows Spothole to augment its data with lookups from these services. See the following
+        section, Privacy, for details of how these are handled. If you are looking at the map and see lots of spots in
+        the geographic centre of countries, allowing these lookups will help. For QRZ.com a paid account is required to
+        look up operator locations.</p>
+
+{% end %}