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Backwards Compatibility:
Fully Compatible
Operating System:
ALL
Steps To Reproduce:

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// Triangle around Shenzhen, China
var shenzhenPoly = {}
shenzhenPoly.type = 'Polygon',
shenzhenPoly.coordinates = [
[
[ 114.0834046, 22.6648202 ],
[ 113.8293457, 22.3819359 ],
[ 114.2736054, 22.4047911 ],
[ 114.0834046, 22.6648202 ]
]
];

var CRS = {}
CRS.type = 'name';
CRS.properties = {}
// no good but expected it to work:
CRS.properties.name = 'urn:mongodb:crs:strictwinding:EPSG:4326';

shenzhenPoly.crs = CRS;
curs = coll.find({loc: {$geoWithin: {$geometry: shenzhenPoly}}});

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// Triangle around Shenzhen, China var shenzhenPoly = {} shenzhenPoly.type = 'Polygon', shenzhenPoly.coordinates = [ [ [ 114.0834046, 22.6648202 ], [ 113.8293457, 22.3819359 ], [ 114.2736054, 22.4047911 ], [ 114.0834046, 22.6648202 ] ] ]; var CRS = {} CRS.type = 'name'; CRS.properties = {} // no good but expected it to work: CRS.properties.name = 'urn:mongodb:crs:strictwinding:EPSG:4326'; shenzhenPoly.crs = CRS; curs = coll.find({loc: {$geoWithin: {$geometry: shenzhenPoly}}});

I found mongod, geo search using big polygon feature CRS didn't accept the CRS I expected.

I expected:
"urn:mongodb:crs:strictwinding:EPSG:4326"
... where EPSG:4326 is the well-known legacy CRS identifier for WGS84 data.

But only this value for CRS worked:
'urn:mongodb:strictwindingcrs:EPSG:4326'