Note that EDCS Classification Codes are arranged in a shallow hierarchy by their 5 character encoding (2 alpha, 3 numeric):
| Null | Added to support information processing applications. |
|---|---|
| Culture | |
| Hydrography | |
| Hypsography | |
| Physiography | |
| Vegetation | |
| Demarcation | |
| Aeronautical Information | |
| Cadastral | |
| Mobile | Added to support Model classification/features. |
| Ocean | Added to support Oceanographic classifications/features. |
| Special Use | |
| Weather & Space | Added to support Weather and Space classifications/features. |
| General |