I investigated IP geolocation accuracy to figure out how large to render the "accuracy radius" for the initial geo-ip location on my weather app (<a href="https://geolocation-survey.leftium.com/" rel="nofollow">https://geolocation-survey.leftium.com/</a>)<p>Initially, I thought 25km might be large enough. Sometimes it is, but other times the geo-ip location is off by 800km!<p>So I guess a single number for "accuracy radius" isn't good enough.<p>- WiFi-IP-based geolocation tends to be more accurate.<p>- Cellular-IP-based geolocation tends to be a crapshoot.<p>BigData Cloud gives a confidence area for each geo-IP location that is updated daily like this: <a href="https://www.bigdatacloud.com/what-is-my-ip" rel="nofollow">https://www.bigdatacloud.com/what-is-my-ip</a>