Number of collections on marker
specifies how many
collections are in each cluster. Zoom in further or click on collection
clusters to disperse.
Source: NGGDPP
Extent
Hover over collections to view
its extent. The
extent of clustered collections is accummulated.
Source: NGGDPP
Items
Number of items on marker
specifies how many items
are in each cluster. Zoom in further or click on item clusters to disperse.
Source: NGGDPP
Topographic Base Map
This base map includes
administrative boundaries, cities, water features, physiographic features,
parks, landmarks, highways, roads, railways, and airports.