Elvish Compass Rose

Compass Rose from the Elendilion website
with proper use of the Tengwar

J. R. R. Tolkien in his Appendix E in The Lord of the Rings explained how the Tengwar signs were used on the maps:

The names of the letters most widely known and used were 17 n, 33 hy, 25 r, 10 f: númen, hyarmen, rómen, formen = west, south, east, north (cf. Sindarin dûn or annûn, harad, rhûn or amrûn, forod). These letters commonly indicated the points W, S, E, N even in languages that used quite different terms. They were, in the West-lands, named in this order, beginning with and facing west; hyarmen and formen indeed meant left-hand region and right-hand region (the opposite to the arrangement in many Mannish languages).

Writing about numbers 17, 33, 25 and 10 Tolkien had in mind this table of the Tengwar signs from the Appendix E:

The WSEN signs should be taken from this table (the Tengwar)

A curiosity. Some authors not undestanding the difference between the Tenwar letters and the Cirth runes used the runic signs nos. 17, 33, 25, 10 from another table. It was with no sense, because these runes had the meanings: nj, ng, khw and th:

The Cirth runes from Appendix E in "The Lord of the Rings"

First this mistake was made in The Atlas of Middle-earth by Karen Wynn Fonstad (1), and then unfortunately by Amazon Prime on their first map. (2). Fortunately we, the fans, helped them to correct this. 

(1) Wrong sings in Fonstad's atlas

(2) Wrong sings on the first Amazon's map