Cwm yr Erw, Powys

• Parish/Community: Cadfarch
• Unitary Authority: Powys
• Region: Wales

• Category: Geographic Feature
• Type: Valley

• Latitude/Longitude: 52°32'54"N 3°46'0"W
• Eastings/Northings: 280295, 295977
• OS Grid: SN802959
• Mapcode Local: GBR 95.DK7F
• Mapcode Global: VH5BD.N6HN

Location and coordinates are for the approximate centre of Cwm yr Erw within this administrative area. Geographic features and populated places may cross administrative borders.