Native circular graphs beside the known gauge style is not a known strength of grafana. So a friend used the capability to map Unicode strings to value ranges and display one of several UTF arrow symbols based on an incoming wind direction value!
Don’t be curious about the overlapping values; here they won’t flicker that much! ;)
JSON snippet (when displyed here, UTF chars should look as intended):
"rangeMaps": [
{
"from": "0",
"text": "↓",
"to": "22.5"
},
{
"from": "22.5",
"text": "↙",
"to": "77.5"
},
{
"from": "77.5",
"text": "←",
"to": "112.5"
},
{
"from": "112.5",
"text": "↖",
"to": "157.5"
},
{
"from": "157.5",
"text": "↑",
"to": "202.5"
},
{
"from": "202.5",
"text": "↗",
"to": "247.5"
},
{
"from": "247.5",
"text": "→",
"to": "292.5"
},
{
"from": "292.5",
"text": "↘",
"to": "337.5"
},
{
"from": "337.5",
"text": "↓",
"to": "360"
}
],
There are many other arrows, c+p as needed in the text field of range mappings (actual appearance here will differ on different machines):
←, ↑, →, ↓, ↔, 
, 
, 
, 
, 
, ▲, ▼, 
, 
, ➔, ➘, ➙, ➚, ➛, ➜, ➝, ➞, ➟, ➠, 
, ➢, ➣, ➤, ➥, ➦, 
, 
, ↚, ↛, ↜, ↝, ↞, ↟, ↠, ↡, ↢, ↣, ↤, ↦, ↥, ↧, ↨, ↫, ↬, ↭, ↮, ↯, ↰, ↱, ↲, ↴, ↳, ↵, ↶, ↷, ↸, ↹, ↺, ↻, ⟲, ⟳, ↼, ↽, ↾, ↿, ⇀, ⇁, ⇂, ⇃, ⇄, ⇅, ⇆, ⇇, ⇐, ⇑, ⇒, ⇓, ⇔, ⇌, ⇍, ⇏, ⇕, ⇖, ⇗, ⇘, ⇙, ⇙, ⇳, ⇚, ⇛, ⇜, ⇝, ⇞, ⇟, ⇟, ⇟, ⇠, ⇡, ⇢, ⇣, ⇤, ⇥, ⇦, ⇨, ⇩, ⇪, ⇧, ⇫, ⇬, ⇭, ⇮, ⇯, ⇰, ⇱, ⇲, ⇴, ⇵, ⇶, ⇷, ⇸, ⇹, ⇺, ⇺, ⇻, ⇼, ⇽, ⇾, ⇿, ⟰, ⟱, ⟴, ⟵, ⟶, ⟷, ⟸, ⟹, ⟽, ⟾, ⟺, ⟻, ⟼, ⟿, ⤀, ⤁, ⤅, ⤂, ⤃, ⤄, ⤆, ⤇, ⤈, ⤉, ⤊, ⤋, ⤌, ⤍, ⤎, ⤏, ⤐, ⤑, ⤒, ⤓, ⤔, ⤕, ⤖, ⤗, ⤘, ⤙, ⤙, ⤚, ⤛, ⤜, ⤝, ⤞, ⤡, ⤢, ⤣, ⤤, ⤥, ⤦, ⤧, ⤨, ⤩, ⤪, ⤭, ⤮, ⤯, ⤰, ⤱, ⤲, ⤳, ⤻, ⤸, ⤾, ⤿, ⤺, ⤼, ⤽, 
, 
, ⤶, ⤷, ⤹, ⥀, ⥁, ⥂, ⥃, ⥄, ⥅, ⥆, ⥇, ⥈, ⥉, ⥒, ⥓, ⥔, ⥕, ⥖, ⥗, ⥘, ⥙, ⥚, ⥛, ⥜, ⥝, ⥞, ⥟, ⥠, ⥡, ⥢, ⥣, ⥤, ⥥, ⥦, ⥧, ⥨, ⥩, ⥪, ⥫, ⥬, ⥭, ⥮, ⥯, ⥰, ⥱, ⥲, ⥳, ⥴, ⥵, ⥶, ⥷, ⥸, ⥹, ⥺, ⥻, ➧, ➨, ➩, ➪, ➫, ➬, ➭, ➮, ➯, ➱, ➲, ➳, ➴, ➵, ➶, ➷, ➸, ➹, ➺, ➻, ➼, ➽, ➾, 
, 
, 
, ⏎, ⬎, ⬏, ⬐, ⬑, ☈, ☇, ⍃, ⍄, ⍇, ⍈, ⍐, ⍗, ⍌, ⍓, ⍍, ⍔, ⍏, ⍖, ⍅, ⍆, ⬈, ⬉, ⬊, ⬋, ⬌, ⬍, ⬀, ⬁, ⬂, ⬃, ⬄
(Unicode set from https://github.com/unicode-table/unicode-table-data/blob/master/data/sets.txt ) another source here: https://symbl.cc/en/collections/arrow-symbols/
