OSM SQLite Experiment: Frequency of key waterway (elem type w)

These queries show the top frequencies of keys for key (element type )

1 stream 21,295,600
2 ditch 3,804,517
3 river 1,808,082
4 drain 1,658,481
5 canal 1,013,722
6 dam 187,413
7 weir 72,103
8 rapids 38,317
9 drystream 16,123
10 artificial 14,330
11 tidal_channel 13,494
12 pressurised 8,685
13 lock_gate 6,167
14 dock 4,672
15 fairway 3,665
16 wadi 3,537
17 boatyard 3,286
18 link 3,008
19 waterfall 2,669
20 fish_pass 2,571
21 derelict_canal 2,302
22 brook 1,760
23 yes 1,533
24 check_dam 757
25 drainage_channel 749
26 floating_barrier 677
27 connector 429
28 flowline 352
29 fuel 325
30 spillway 318
31 sluice_gate 317
32 sewer 259
33 construction 229
34 riverbank 223
35 oxbow 212
36 flow_control 161
37 swale 148
38 security_lock 146
39 dyke 128
40 proposed 116
41 pond 103
42 underground_drain 73
43 culvert 72
44 tunnel 69
45 pumping_station 60
46 drainage_gutter 57
47 abandoned 55
48 boat_lift 54
49 floodgate 52
50 navigation 51

:-)