Sample areas
Figure 1 shows the areas chosen for sample NHD data in an attempt to capture a wide variety of features. The feature tables were combined for each later, and a count produced of each unique FCode for each layer. Results presented below
Line features
| Frequency
|
FCode
|
Description
|
| 1090
|
41100
|
Nonearthen Shore
|
| 691
|
50302
|
Sounding Datum Line: Positional Accuracy = Definite
|
| 292
|
34306
|
Dam/Weir: Construction Material = Nonearthen
|
| 220
|
34305
|
Dam/Weir: Construction Material = Earthen
|
| 95
|
43400
|
Reef
|
| 95
|
47800
|
Tunnel
|
| 80
|
36200
|
Flume
|
| 34
|
50301
|
Sounding Datum Line: Positional Accuracy = Approximate
|
| 13
|
36900
|
Gate
|
| 7
|
48300
|
Wall
|
| 1
|
53301
|
Special Use Zone Limit: Positional Accuracy = Definite
|
| 1
|
31800
|
Bridge
|
FlowLines
| Frequency
|
FCode
|
Description
|
| 49609
|
46003
|
Stream/River: Hydrographic Category = Intermittent
|
| 21441
|
46006
|
Stream/River: Hydrographic Category = Perennial
|
| 19506
|
55800
|
Artificial Path
|
| 10269
|
33600
|
Canal/Ditch
|
| 5250
|
56600
|
Coastline
|
| 4071
|
46007
|
Stream/River: Hydrographic Category = Ephemeral
|
| 2854
|
33400
|
Connector
|
| 410
|
42803
|
Pipeline: Pipeline Type = Aqueduct; Relationship to Surface = Underground
|
| 306
|
46000
|
Stream/River
|
| 241
|
42807
|
Pipeline: Pipeline Type = General Case; Relationship to Surface = Underground
|
| 171
|
42813
|
Pipeline: Pipeline Type = Siphon
|
| 109
|
42801
|
Pipeline: Pipeline Type = Aqueduct; Relationship to Surface = At or Near
|
| 60
|
33601
|
Canal/Ditch: Canal/Ditch Type = Aqueduct
|
| 46
|
42802
|
Pipeline: Pipeline Type = Aqueduct; Relationship to Surface = Elevated
|
| 39
|
42823
|
Pipeline: Pipeline Type = Stormwater; Relationship to Surface = Underground
|
| 2
|
42811
|
Pipeline: Pipeline Type = Penstock; Relationship to Surface = Underground
|
| 2
|
33603
|
Canal Ditch: Canal Ditch Type = Stormwater
|
| 1
|
42809
|
Pipeline: Pipeline Type = Penstock; Relationship to Surface = At or Near
|
| 1
|
42800
|
Pipeline
|
Areas
| Frequency
|
FCode
|
Description
|
| 835
|
36400
|
Foreshore
|
| 373
|
46006
|
Stream/River: Hydrographic Category = Perennial
|
| 237
|
40307
|
Inundation Area: Inundation Control Status = Not Controlled
|
| 210
|
48400
|
Wash
|
| 65
|
33600
|
Canal/Ditch
|
| 36
|
44500
|
Sea/Ocean
|
| 18
|
45500
|
Spillway
|
| 16
|
34306
|
Dam/Weir: Construction Material = Nonearthen
|
| 10
|
33601
|
Canal/Ditch: Canal/Ditch Type = Aqueduct
|
| 8
|
46003
|
Stream/River: Hydrographic Category = Intermittent
|
| 4
|
40308
|
Inundation Area: Inundation Control Status = Controlled
|
| 4
|
40309
|
Inundation Area: Inundation Control Status = Controlled; Stage = Flood Elevation
|
| 2
|
46100
|
Submerged Stream
|
| 2
|
37300
|
Hazard Zone
|
| 1
|
45403
|
Special Use Zone: Special Use Zone Type = Spoil Area; Operational Status = Operational
|
| 1
|
39800
|
Lock Chamber
|
| 1
|
34305
|
Dam/Weir: Construction Material = Earthen
|
Water Bodies
| Frequency
|
FCode
|
Description
|
| 15904
|
39004
|
|
Lake/Pond: Hydrographic Category = Perennial
|
| 5852
|
39001
|
|
Lake/Pond: Hydrographic Category = Intermittent
|
| 2827
|
46600
|
|
Swamp/Marsh
|
| 346
|
43607
|
|
Reservoir: Reservoir Type = Evaporator
|
| 321
|
43624
|
|
Reservoir; Reservoir Type = Treatment
|
| 280
|
39009
|
|
Lake/Pond: Hydrographic Category = Perennial; Stage = Average Water Elevation
|
| 264
|
43613
|
|
Reservoir: Reservoir Type = Water Storage; Construction Material = Nonearthen
|
| 255
|
43612
|
|
Reservoir: Reservoir Type = Sewage Treatment Pond
|
| 168
|
43601
|
|
Reservoir: Reservoir Type = Aquaculture
|
| 92
|
36100
|
|
Playa
|
| 85
|
43600
|
|
Reservoir
|
| 58
|
43623
|
|
Reservoir: Reservoir Type = Evaporator; Construction Material = Earthen
|
| 33
|
43606
|
|
Reservoir: Reservoir Type = Disposal
|
| 25
|
43610
|
|
Reservoir: Reservoir Type = Filtration Pond
|
| 24
|
39012
|
|
Lake/Pond: Hydrographic Category = Perennial; Stage = Spillway Elevation
|
| 18
|
43609
|
|
Reservoir: Reservoir Type = Cooling Pond
|
| 15
|
37800
|
|
Ice Mass
|
| 13
|
39010
|
|
Lake/Pond: Hydrographic Category = Perennial; Stage = Normal Pool
|
| 7
|
43619
|
|
Reservoir: Construction Material = Nonearthen
|
| 6
|
43604
|
|
Reservoir: Reservoir Type = Tailings Pond; Construction Material = Earthen
|
| 6
|
43617
|
|
Reservoir: Reservoir Type = Water Storage
|
| 3
|
43621
|
|
Reservoir: Reservoir Type = Water Storage; Hydrographic Category = Perennial
|
| 3
|
39005
|
|
Lake/Pond: Hydrographic Category = Intermittent; Stage = High Water Elevation
|
| 1
|
43625
|
|
Reservoir: Reservoir Type = Disposal; Construction Material = Earthen
|
| 1
|
43618
|
|
Reservoir: Construction Material = Earthen
|
Points
| Frequency
|
FCode
|
Description
|
| 3104
|
45800
|
Spring/Seep
|
| 1869
|
48800
|
Well
|
| 581
|
44101
|
Rock: Relationship to Surface = Abovewater
|
| 103
|
36700
|
Gaging Station
|
| 39
|
45000
|
Sink/Rise
|
| 31
|
48700
|
Waterfall
|
| 10
|
44102
|
Rock: Relationship to Surface = Underwater
|
| 7
|
48500
|
Water Intake/Outflow
|
| 2
|
43100
|
Rapids
|
| 2
|
39800
|
Lock Chamber
|
