In the ancient literature about traditional feng shui science,  there was a jargon commonly be quote and unquote, 
"River Map is used as for the foundation map and principles, Lu Shu is used as for application". 
Below two diagrams were extracted from the ancient china classical literature titled "heluo jingyun zhuyin" witten in ching dynasty. The book title can be translated as " The essence of River Map and Lu Shu science development - explanatory guide". 
The diagrams can show the evolution and development of the feng shui luopan as per the foundation of River Map numerology theory. 
1. The inner centre is named "heaven pool" where the Heavenly Stems and
the River Map numbers 5, 10 for earth locate as the core.
2. The River Map numbers 1, 6 in the north; numbers 3, 8 in the east;
numbers 2, 7 in the south;  numbers 4, 9 in the west.
3. Ten Heavenly Stems,    
As numbers 3, 8 for wood, so 3 for Jia and 8 for Yi.
As numbers 2, 6 for fire, so 7 for Bing and 2 for Ding.
As numbers 9, 4 for metal, so 9 for Geng and 4 for Xin.
As numbers 1, 6 for water, so 1 for Ren and 6 for Gui.
As nymbers 5, 10 for earth, so 5 for Wu and 10 for Ji at centre core.
4. Twelve Earthly Branches
Twelve EB are positioned as per the directional group like in bazi science,
into north for water, east for wood, south gor fire, west for metal.
For example,
Hai-Zi-Chou, these 3 EB form up as for north water set. 
5. Eight Trigrams  
This are the laterly heaven 8 trigrams as per their position.
6. Twenty-four MountainsThis the last layout with the 24 mountains mapped
to the 8 trigrams accordingly.
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