<p>The actual code is at <a href="https://github.com/openstreetmap/openstreetmap-website/blob/master/app/controllers/geocoder_controller.rb#L293">https://github.com/openstreetmap/openstreetmap-website/blob/master/app/controllers/geocoder_controller.rb#L293</a> and as you can see the patterns we recognise are already pretty... complicated...</p>
<p>I think the only two of your examples which don't work are the first one, because we don't allow a degree symbol when using decimal degrees, and the last one because we don't allow use of +/- when using sexagesimal notation - we expect N/S/E/W instead.</p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br />You are receiving this because you are subscribed to this thread.<br />Reply to this email directly, <a href="https://github.com/openstreetmap/openstreetmap-website/issues/2366?email_source=notifications&email_token=AAK2OLIHPRGZKMOM3Y5MN4LQHYXX7A5CNFSM4ITD7VR2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD5XVE3I#issuecomment-527389293">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/AAK2OLLEK27CT2MNVWQKQTDQHYXX7ANCNFSM4ITD7VRQ">mute the thread</a>.<img src="https://github.com/notifications/beacon/AAK2OLJGAFBASEXXO4ATEPDQHYXX7A5CNFSM4ITD7VR2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD5XVE3I.gif" height="1" width="1" alt="" /></p>
<script type="application/ld+json">[
{
"@context": "http://schema.org",
"@type": "EmailMessage",
"potentialAction": {
"@type": "ViewAction",
"target": "https://github.com/openstreetmap/openstreetmap-website/issues/2366?email_source=notifications\u0026email_token=AAK2OLIHPRGZKMOM3Y5MN4LQHYXX7A5CNFSM4ITD7VR2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD5XVE3I#issuecomment-527389293",
"url": "https://github.com/openstreetmap/openstreetmap-website/issues/2366?email_source=notifications\u0026email_token=AAK2OLIHPRGZKMOM3Y5MN4LQHYXX7A5CNFSM4ITD7VR2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD5XVE3I#issuecomment-527389293",
"name": "View Issue"
},
"description": "View this Issue on GitHub",
"publisher": {
"@type": "Organization",
"name": "GitHub",
"url": "https://github.com"
}
}
]</script>