Various online maps, cross referenced with geotagged photos and video of the region. 

For example, there are 78 photos confirming the location of the cemetery: https://www.google.com/maps/place/Twenedurase+Cemetery/@6.6041096,-0.7822632,3a,75y,90t/data=!3m8!1e2!3m6!1sAF1QipMTf1mnddl-_7Hc9T7n4oA_JOnX3E40n0-BDSmq!2e10!3e12!6shttps:%2F%2Flh5.googleusercontent.com%2Fp%2FAF1QipMTf1mnddl-_7Hc9T7n4oA_JOnX3E40n0-BDSmq%3Dw152-h86-k-no!7i1920!8i1080!4m15!1m7!3m6!1s0xfd93b6982a74d41:0xa4d425ee4b51a5ed!2sTwenedurase-kwahu+signpost!8m2!3d6.6012516!4d-0.7785561!16s%2Fg%2F11t61qvy63!3m6!1s0xfd93b109cf09785:0xab10f8d7827eb4f6!8m2!3d6.6040312!4d-0.782512!10e5!16s%2Fg%2F11t6071cjp?entry=ttu