'USGS-430435098554301'

Property Value
uri https://geoconnex.us/iow/wqp/USGS-430435098554301
id 'USGS-430435098554301'
@iot.selfLink https://wqp.internetofwater.app/FROST-Server/v1.1/Things('USGS-430435098554301')
name 95N68W 6ACDB
description 95N68W 6ACDB
Locations @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Locations(686211)
@iot.id: 686211
name: 95N68W 6ACDB
description: 95N68W 6ACDB
encodingType: application/geo+json
location: type: Point
coordinates: -98.9289789 43.07638595

Datastreams @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('14618449084039528647993596289784')
@iot.id: 14618449084039528647993596289784
name: Mercury at USGS-430435098554301
description: Mercury at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: Unknown
symbol: Unknown
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1981-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('11651458626624902887189836680527')
@iot.id: 11651458626624902887189836680527
name: Mercury
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/149633
description: Mercury

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('17414576743819561687925830181558')
@iot.id: 17414576743819561687925830181558
name: Sodium at USGS-430435098554301
description: Sodium at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: milligrams per liter
symbol: mg/l
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('53220774460964690044205002757705')
@iot.id: 53220774460964690044205002757705
name: Sodium
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/149856
description: Sodium

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('17841100473625845919316368941956')
@iot.id: 17841100473625845919316368941956
name: Cadmium at USGS-430435098554301
description: Cadmium at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: micrograms per liter
symbol: ug/L
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1981-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('64259774043315913468516393720022')
@iot.id: 64259774043315913468516393720022
name: Cadmium
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/150029
description: Cadmium

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('26682848662496562711885286417554')
@iot.id: 26682848662496562711885286417554
name: Bicarbonate at USGS-430435098554301
description: Bicarbonate at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: milligrams per liter
symbol: mg/l
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('77819453600156100046415667402963')
@iot.id: 77819453600156100046415667402963
name: Bicarbonate
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/4788
description: Bicarbonate

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('3662346471184435401954427173933')
@iot.id: 3662346471184435401954427173933
name: Hardness, Ca, Mg at USGS-430435098554301
description: Hardness, Ca, Mg at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: milligrams per liter as calcium carbonate
symbol: mg/l CaCO3
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('16432482037230443956484813311332')
@iot.id: 16432482037230443956484813311332
name: Hardness, Ca, Mg
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/1640416
description: Hardness, Ca, Mg

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('36717503989054346347262223725317')
@iot.id: 36717503989054346347262223725317
name: Iron at USGS-430435098554301
description: Iron at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: percent
symbol: %
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('52205089669330468989565214918791')
@iot.id: 52205089669330468989565214918791
name: Iron
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/149559
description: Iron

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('38800363434452680894427068384692')
@iot.id: 38800363434452680894427068384692
name: Barium at USGS-430435098554301
description: Barium at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: micrograms per liter
symbol: ug/L
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1981-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('27863763816423605155538049277095')
@iot.id: 27863763816423605155538049277095
name: Barium
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/149997
description: Barium

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('3889326638589931238095602185260')
@iot.id: 3889326638589931238095602185260
name: Specific conductance at USGS-430435098554301
description: Specific conductance at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: microsiemens per centimeter
symbol: umho/cm
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('12567298782611007708110915971167')
@iot.id: 12567298782611007708110915971167
name: Specific conductance
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/1646694
description: Specific conductance

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('39789981249266185361370661179445')
@iot.id: 39789981249266185361370661179445
name: Arsenic at USGS-430435098554301
description: Arsenic at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: parts per million
symbol: ppm
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1981-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('37151030753184299540327073486736')
@iot.id: 37151030753184299540327073486736
name: Arsenic
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/149989
description: Arsenic

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('39939555455156808963531681408781')
@iot.id: 39939555455156808963531681408781
name: Magnesium at USGS-430435098554301
description: Magnesium at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: percent
symbol: %
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('24114827492771769934151508586206')
@iot.id: 24114827492771769934151508586206
name: Magnesium
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/149617
description: Magnesium

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('42594059224041082564364919704843')
@iot.id: 42594059224041082564364919704843
name: Silver at USGS-430435098554301
description: Silver at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: Unknown
symbol: Unknown
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1981-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('85884975600006374350349756152224')
@iot.id: 85884975600006374350349756152224
name: Silver
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/149849
description: Silver

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('45017297050954235598757704242869')
@iot.id: 45017297050954235598757704242869
name: Total dissolved solids at USGS-430435098554301
description: Total dissolved solids at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: milligrams per liter
symbol: mg/l
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('73755705984765935056318634621086')
@iot.id: 73755705984765935056318634621086
name: Total dissolved solids
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/1642222
description: Total dissolved solids

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('46338004523690679345027951304567')
@iot.id: 46338004523690679345027951304567
name: Nitrate at USGS-430435098554301
description: Nitrate at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: milligrams per liter as nitrogen
symbol: mg/l as N
definition: Unknown

phenomenonTime: 1980-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('2855077001836216052483908983073')
@iot.id: 2855077001836216052483908983073
name: Nitrate
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/197186
description: Nitrate

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('4770203140796699584178260189585')
@iot.id: 4770203140796699584178260189585
name: Chloride at USGS-430435098554301
description: Chloride at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: milligrams per liter
symbol: mg/l
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('89056658239570963426346909605521')
@iot.id: 89056658239570963426346909605521
name: Chloride
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/205955
description: Chloride

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('55570450172907609793920899191704')
@iot.id: 55570450172907609793920899191704
name: Fluoride at USGS-430435098554301
description: Fluoride at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: milligrams per liter
symbol: mg/l
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('40962064083573525036050477039764')
@iot.id: 40962064083573525036050477039764
name: Fluoride
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/206706
description: Fluoride

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('55824984542569069838725410779601')
@iot.id: 55824984542569069838725410779601
name: pH at USGS-430435098554301
description: pH at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: Unknown
symbol: None
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('7452196909398850174633187061287')
@iot.id: 7452196909398850174633187061287
name: pH
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/17028275
description: pH

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('63786681256673598762821814545465')
@iot.id: 63786681256673598762821814545465
name: Calcium at USGS-430435098554301
description: Calcium at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: milligrams per liter
symbol: mg/L
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('23201293605148882787246037787746')
@iot.id: 23201293605148882787246037787746
name: Calcium
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/150268
description: Calcium

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('67111820745062277690342338054002')
@iot.id: 67111820745062277690342338054002
name: Lead at USGS-430435098554301
description: Lead at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: micrograms per liter
symbol: ug/l
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1981-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('52370036934752207473767603704818')
@iot.id: 52370036934752207473767603704818
name: Lead
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/149583
description: Lead

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('71987319107716263336271925582031')
@iot.id: 71987319107716263336271925582031
name: Sodium, percent total cations at USGS-430435098554301
description: Sodium, percent total cations at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: percent
symbol: %
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('52728678544360106143710032625905')
@iot.id: 52728678544360106143710032625905
name: Sodium, percent total cations
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/1646660
description: Sodium, percent total cations

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('73567948845328314403954432396443')
@iot.id: 73567948845328314403954432396443
name: Nitrite at USGS-430435098554301
description: Nitrite at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: milligrams per liter
symbol: mg/L
definition: Unknown

phenomenonTime: 1980-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('35065978996866626219838999739919')
@iot.id: 35065978996866626219838999739919
name: Nitrite
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/197194
description: Nitrite

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('87993076774769791978705311221685')
@iot.id: 87993076774769791978705311221685
name: Manganese at USGS-430435098554301
description: Manganese at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: micrograms per liter
symbol: ug/l
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('40499060786665984854085175624918')
@iot.id: 40499060786665984854085175624918
name: Manganese
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/149625
description: Manganese

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('89957993636009374479645551873941')
@iot.id: 89957993636009374479645551873941
name: Temperature, water at USGS-430435098554301
description: Temperature, water at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: degrees Celsius
symbol: deg C
definition: Unknown

phenomenonTime: 1982-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('88489552470604671589664093265019')
@iot.id: 88489552470604671589664093265019
name: Temperature, water
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/1645597
description: Temperature, water

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('93490011436163451626025302324195')
@iot.id: 93490011436163451626025302324195
name: Potassium at USGS-430435098554301
description: Potassium at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: milligrams per liter
symbol: mg/l
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('93244303131840681319227638648621')
@iot.id: 93244303131840681319227638648621
name: Potassium
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/149740
description: Potassium

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('9353219398245850029696042004078')
@iot.id: 9353219398245850029696042004078
name: Chromium at USGS-430435098554301
description: Chromium at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: parts per billion
symbol: ppb
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1981-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('21008113118039653260804124203733')
@iot.id: 21008113118039653260804124203733
name: Chromium
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/150060
description: Chromium

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('93624127185969032737061704565536')
@iot.id: 93624127185969032737061704565536
name: Carbon dioxide at USGS-430435098554301
description: Carbon dioxide at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: milligrams per liter
symbol: mg/l
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('48726967474550952645024390989128')
@iot.id: 48726967474550952645024390989128
name: Carbon dioxide
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/33548
description: Carbon dioxide

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('98695234214231298376140216592525')
@iot.id: 98695234214231298376140216592525
name: Selenium at USGS-430435098554301
description: Selenium at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: micrograms per liter
symbol: ug/l
definition: Unknown

phenomenonTime: 1980-01-01T00:00:00Z/1981-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('75474244416881380230185576922424')
@iot.id: 75474244416881380230185576922424
name: Selenium
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/154310
description: Selenium

@iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/Datastreams('99779808596084695958257063077004')
@iot.id: 99779808596084695958257063077004
name: Sulfate at USGS-430435098554301
description: Sulfate at USGS-430435098554301
observationType: http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_Measurement
unitOfMeasurement: name: milligrams per liter
symbol: mg/l
definition: Unknown

phenomenonTime: 1981-01-01T00:00:00Z/1982-12-31T00:00:00Z
ObservedProperty: @iot.selfLink: https://wqp.internetofwater.app/FROST-Server/v1.1/ObservedProperties('88843541792070645955654492880996')
@iot.id: 88843541792070645955654492880996
name: Sulfate
definition: https://cdxapps.epa.gov/oms-substance-registry-services/substance-details/197301
description: Sulfate

HistoricalLocations@iot.navigationLink https://wqp.internetofwater.app/FROST-Server/v1.1/Things('USGS-430435098554301')/HistoricalLocations
Locations@iot.navigationLink https://wqp.internetofwater.app/FROST-Server/v1.1/Things('USGS-430435098554301')/Locations
Datastreams@iot.navigationLink https://wqp.internetofwater.app/FROST-Server/v1.1/Things('USGS-430435098554301')/Datastreams
OrganizationFormalName USGS South Dakota Water Science Center
county https://geoconnex.us/ref/counties/46053
hu08 https://geoconnex.us/ref/hu08/10140101
monitoringLocationType Well
provider NWIS
state https://geoconnex.us/ref/states/46
Links