Namespace List
Here is a list of all namespaces with brief descriptions:

detail |
osmium | Namespace for everything in the Osmium library
area | Code related to the building of areas (multipolygons) from relations
builder | Classes for building OSM objects and other items in buffers
attr |
config |
diff_handler | Osmium diff handlers provide access to differences between OSM object versions
experimental | Experimental code that is not "officially" supported
geom | Everything related to geometry handling
haversine | Functions to calculate arc distance on Earth using the haversine formula
handler | Osmium handlers provide callbacks for OSM objects
index | Indexing of OSM data, Locations, etc
map | Key-value containers with unique integer values for a key
multimap | Key-value containers with multiple values for an integer key
io | Everything related to input and output of OSM data
memory | Memory management of items in buffers and iterators over this data
osm_entity_bits | Bitfield for OSM entity types
relations | Code related to the assembly of OSM relations
tags | Code related to working with OSM tags
thread | Threading-related low-level code
util | Helpful utility classes and functions not strictly OSM related
std |