Genre
Maps
Topographic maps
3,312
Remote-sensing maps
476
Road maps
444
Atlases
308
Tourist maps
245
Quadrangle maps
212
Geological maps
194
Bathymetric maps
181
Thematic maps
176
Remote-sensing images
175
Physical maps
131
Databases
126
Drawings
100
Outline maps
95
Bibliographies
87
Graphs
81
World maps
56
Statistics
50
Charts, diagrams, etc
48
Indexes
48
Periodicals
46
Digital maps
37
Index maps
37
Catalogs
25
Aerial views
24
Guidebooks
23
Census data
21
Technical reports
18
Academic theses
17
Illustrated works
15
Dictionaries
14
Facsimiles
12
Geological cross-sections
11
Handbooks and manuals
11
Relief models
10
Conference papers and proceedings
9
Case studies
7
Reference works
7
Surveys
7
Geographic information systems
6
Biographies
5
Chronologies
5
Early maps
5
Electronic government information
5
Outlines and syllabi
5
Pictorial maps
5
Wall maps
5
Aerial photographs
4
Early works to 1800
4
more ...