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No, the coordinates look fine - very close to my old house just off Gower road in Sketty. The rounding errors have moved it a little away from Sketty Cross which is at 51.618249 N -3.986466 W but is sufficiently close enough to locate the area. VelellaVelella Talk 21:29, 12 June 2020 (UTC)[reply]
I've refined the coordinates with an extra decimal place, so that they indicate a location nearer Sketty Cross. Assuming that that's what the OP wanted, I'm deactivating the {{geodata-check}} template. Deor (talk) 23:28, 12 June 2020 (UTC)[reply]