| NOS | NIMA | |
IHO |
|---|---|---|---|
 |
 |
Examples of landmarks |
 |
 |
Examples of conspicuous landmarks |
 |
|
 |
Pictorial symbols (in true position) |
 |
|
|
|
Sketches, Views (out of position) |
 |
|
|
|
 |
Height of top of a structure above plane of reference for heights |
 |
 |
 |
Height of structure above ground level |
 |