{"id" : "4bd9b6892530404abfe13645fcb5099a", 
  "name" : "NHDPlusV21", 
  "owner" : "esri_environment", 
  "guid" : "", 
  "title" : "National Hydrography Dataset Plus Version 2.1", 
  "type" : "Feature Service", 
  "typeKeywords" : [
    "ArcGIS API for JavaScript", 
    "ArcGIS Server", 
    "Data", 
    "Feature Access", 
    "Feature Service", 
    "Metadata", 
    "Multilayer", 
    "Service", 
    "Hosted Service"
  ], 
  "description" : "\u003cp\u003e\u003cspan style='color:#b22222;'\u003e\u003cstrong\u003eRetirement Notice: \u003c/strong\u003e\u003c/span\u003e\u003cstrong\u003eThis item is in \u003c/strong\u003e\u003ca target='_blank' href='https://goto.arcgis.com/lifecycle/content' rel='nofollow ugc noopener noreferrer'\u003e\u003cstrong\u003emature support\u003c/strong\u003e\u003c/a\u003e\u003cstrong\u003e as of April 2026 and will be retired in December 2027. A \u003c/strong\u003e\u003ca target='_blank' href='https://www.arcgis.com/home/item.html?id=6b080ce68508453a9745873b7bb5cde2' rel='nofollow ugc noopener noreferrer'\u003e\u003cstrong\u003enew version of this item\u003c/strong\u003e\u003c/a\u003e\u003cstrong\u003e is available for your use.\u003c/strong\u003e Esri recommends updating your maps and apps to use the new version.\u003c/p\u003e\u003cp\u003eThe National Hydrography Dataset Plus (NHDplus) maps the\u003cspan\u003e lakes, ponds, streams, rivers and other surface waters of the United States. Created by the\u003c/span\u003e \u003ca target='_blank' href='https://www.epa.gov/waterdata/basic-information' rel='nofollow ugc noopener noreferrer'\u003eUS EPA Office of Water\u003c/a\u003e and the \u003ca target='_blank' href='https://www.usgs.gov/core-science-systems/ngp/national-hydrography' rel='nofollow ugc noopener noreferrer'\u003eUS Geological Survey\u003c/a\u003e, the NHDPlus provides mean annual and monthly flow estimates for rivers and streams. Additional attributes provide connections between features facilitating complicated analyses.\u003c/p\u003e\u003cdiv\u003eFor more information on the NHDPlus dataset see the \u003ca target='_blank' href='https://www.horizon-systems.com/NHDPlus/NHDPlusV2_documentation.php#NHDPlusV2%20User%20Guide' rel='nofollow ugc noopener noreferrer'\u003eNHDPlus v2 User Guide\u003c/a\u003e.\u003c/div\u003e\u003cdiv\u003e \u003c/div\u003e\u003cdiv\u003e\u003cimg src='https://www.esri.com/arcgis-blog/wp-content/uploads/2025/03/NHD2p1Content_4bd9b6892530404abfe13645fcb5099a.jpg' /\u003e\u003c/div\u003e\u003cdiv\u003e\u003cbr /\u003e \u003c/div\u003e\u003cdiv style='text-align:left;'\u003e\u003cspan style='font-size:large;'\u003e\u003cstrong\u003eDataset Summary\u003c/strong\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003e\u003cspan style='font-size:16px;'\u003e\u003cfont\u003e\u003cspan style='font-variant-ligatures:none;'\u003e\u003cstrong\u003ePhenomenon Mapped:\u003c/strong\u003e Surface waters and related features of the United States and associated territories not including Alaska.\u003c/span\u003e\u003c/font\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003e\u003cfont\u003e\u003cstrong\u003eGeographic Extent: \u003c/strong\u003e\u003c/font\u003e\u003cspan style='font-size:16px;'\u003e\u003cfont\u003e\u003cspan style='font-variant-ligatures:none;'\u003eThe United States not including Alaska, Puerto Rico, Guam, US Virgin Islands, Marshall Islands, Northern Marianas Islands, Palau, Federated States of Micronesia, and American Samoa\u003c/span\u003e\u003c/font\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003e\u003cspan style='font-size:16px;'\u003e\u003cfont\u003e\u003cspan style='font-variant-ligatures:none;'\u003e\u003cstrong\u003eProjection: \u003c/strong\u003eWeb Mercator Auxiliary Sphere \u003c/span\u003e\u003c/font\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003e\u003cstrong\u003eVisible Scale: \u003c/strong\u003e\u003cspan style='font-size:16px;'\u003e\u003cspan style='font-variant-ligatures:none;'\u003eVisible at all scales but layer draws best at scales larger than 1:1,000,000\u003c/span\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003e\u003cspan style='font-size:16px;'\u003e\u003cfont\u003e\u003cspan style='font-variant-ligatures:none;'\u003e\u003cstrong\u003eSource:\u003c/strong\u003e \u003c/span\u003e\u003c/font\u003e\u003c/span\u003e\u003ca target='_blank' href='https://www.epa.gov/waterdata/basic-information' rel='nofollow ugc noopener noreferrer'\u003eEPA\u003c/a\u003e and \u003ca target='_blank' href='https://www.usgs.gov/core-science-systems/ngp/national-hydrography' rel='nofollow ugc noopener noreferrer'\u003eUSGS\u003c/a\u003e\u003c/div\u003e\u003cdiv\u003e\u003cspan style='font-size:16px;'\u003e\u003cfont\u003e\u003cspan style='font-variant-ligatures:none;'\u003e\u003cstrong\u003eUpdate Frequency: \u003c/strong\u003eThere is new new data since this 2019 version, so no updates planned in the future\u003c/span\u003e\u003c/font\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003e\u003cspan style='font-size:16px;'\u003e\u003cfont\u003e\u003cspan style='font-variant-ligatures:none;'\u003e\u003cstrong\u003ePublication Date: \u003c/strong\u003eMarch 13, 2019\u003c/span\u003e\u003c/font\u003e\u003c/span\u003e\u003cbr /\u003e \u003c/div\u003e\u003cdiv\u003e\u003cspan style='font-size:16px;'\u003e\u003cfont\u003e\u003cspan style='font-variant-ligatures:none;'\u003ePrior to publication, the NHDPlus network and non-network flowline feature classes were combined into a single flowline layer. Similarly, the NHDPlus Area and Waterbody feature classes were merged under a single schema.\u003c/span\u003e\u003c/font\u003e\u003c/span\u003e\u003cbr /\u003e \u003c/div\u003e\u003cdiv\u003e\u003cspan style='font-size:16px;'\u003e\u003cfont\u003e\u003cspan style='font-variant-ligatures:none;'\u003eAttribute fields were added to the flowline and waterbody layers to simplify symbology and enhance the layer's pop-ups. Fields added include Pop-up Title, Pop-up Subtitle, On or Off Network (flowlines only), Esri Symbology (waterbodies only), and Feature Code Description. All other attributes are from the original NHDPlus dataset. No data values -9999 and -9998 were converted to Null values for many of the flowline fields.\u003c/span\u003e\u003c/font\u003e\u003c/span\u003e\u003cbr /\u003e \u003c/div\u003e\u003cdiv style='margin:0px; padding:0px; text-align:left;'\u003e\u003cspan style='font-size:large;'\u003e\u003cstrong\u003eWhat can you do with this layer?\u003c/strong\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv style='margin:0px; padding:0px; text-align:left;' align='left'\u003eFeature layers work throughout the ArcGIS system. Generally your work flow with feature layers will begin in ArcGIS Online or ArcGIS Pro. Below are just a few of the things you can do with a feature service in Online and Pro.\u003c/div\u003e\u003cdiv style='margin:0px; padding:0px; text-align:left;' align='left'\u003e \u003c/div\u003e\u003cdiv style='margin:0px; padding:0px; text-align:left;' align='left'\u003e\u003cstrong\u003eArcGIS Online\u003c/strong\u003e\u003c/div\u003e\u003cdiv style='margin:0px; padding:0px; text-align:center;' align='left'\u003e\u003cul\u003e\u003cli\u003e\u003cdiv align='left'\u003eAdd this layer to a map in the map viewer. The layer is limited to scales of approximately 1:1,000,000 or larger but a \u003ca target='_blank' href='https://www.arcgis.com/home/item.html?id=ae4bd17e348c45a4b12448c1890df725' rel='nofollow ugc noopener noreferrer'\u003evector tile layer\u003c/a\u003e created from the same data can be used at smaller scales to produce a webmap that displays across the full range of scales. The layer or a map containing it can be used in an application.\u003cspan style='text-align:center;'\u003e \u003c/span\u003e\u003c/div\u003e\u003c/li\u003e\u003cli\u003e\u003cdiv align='left'\u003e\u003cspan style='text-align:center;'\u003eChange the layer’s transparency and set its visibility range\u003c/span\u003e\u003c/div\u003e\u003c/li\u003e\u003c/ul\u003e\u003c/div\u003e\u003cdiv style='margin:0px; padding:0px; text-align:center;'\u003e\u003cul\u003e\u003cli\u003e\u003cdiv align='left'\u003eOpen the layer’s attribute table and make selections. Selections made in the map or table are reflected in the other. Center on selection allows you to zoom to features selected in the map or table and show selected records allows you to view the selected records in the table.\u003c/div\u003e\u003c/li\u003e\u003cli\u003e\u003cdiv align='left'\u003eApply filters. For example you can set a filter to show larger streams and rivers using the mean annual flow attribute or the stream order attribute.\u003c/div\u003e\u003c/li\u003e\u003cli\u003e\u003cdiv align='left'\u003eChange the layer’s style and symbology\u003c/div\u003e\u003c/li\u003e\u003cli\u003e\u003cdiv align='left'\u003eAdd labels and set their properties\u003c/div\u003e\u003c/li\u003e\u003cli\u003e\u003cdiv align='left'\u003eCustomize the pop-up\u003c/div\u003e\u003c/li\u003e\u003cli\u003e\u003cdiv align='left'\u003eUse as an input to the ArcGIS Online analysis tools. This layer works well as a reference layer with the trace downstream and watershed tools. The buffer tool can be used to draw protective boundaries around streams and the extract data tool can be used to create copies of portions of the data.\u003c/div\u003e\u003c/li\u003e\u003c/ul\u003e\u003c/div\u003e\u003cdiv style='margin:0px; padding:0px;' align='left'\u003e\u003cstrong\u003eArcGIS Pro\u003c/strong\u003e\u003c/div\u003e\u003cdiv style='margin:0px; padding:0px;' align='left'\u003e\u003cul\u003e\u003cli\u003eAdd this layer to a 2d or 3d map.\u003c/li\u003e\u003cli\u003eUse as an input to geoprocessing. For example, copy features allows you to select then export portions of the data to a new feature class.\u003c/li\u003e\u003cli\u003eChange the symbology and the attribute field used to symbolize the data\u003c/li\u003e\u003cli\u003eOpen table and make interactive selections with the map\u003c/li\u003e\u003cli\u003eModify the pop-ups\u003c/li\u003e\u003cli\u003eApply Definition Queries to create sub-sets of the layer\u003c/li\u003e\u003c/ul\u003e\u003c/div\u003e\u003cdiv style='margin:0px; padding:0px;' align='left'\u003e\u003cdiv\u003e\u003cspan style='font-size:large;'\u003e\u003cstrong\u003eQuestions?\u003c/strong\u003e\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003ePlease leave a comment below if you have a question about this layer, and we will get back to you as soon as possible.\u003c/div\u003e\u003c/div\u003e", 
  "tags" : [
    "esri_environment", 
    "retiring-2027-12"
  ], 
  "snippet" : "Lakes, ponds, streams, rivers, and other surface waters of the United States from the National Hydrography Database Plus version 2.1. (Retiring)", 
  "thumbnail" : "thumbnail/thumbnail1742429874258.png", 
  "extent" : [-170.85002201771, -14.3833544501889, 
    145.874996146941, 49.8538144619652
  ], 
  "categorites" : [
    "/Categories/Status/Retiring"
  ], 
  "spatialReference" : "4269", 
  "url" : "https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/NHDPlusV21/FeatureServer", 
  "culture" : "en-us", 
  "licenseInfo" : "\u003cp\u003e\u003cimg src='https://downloads.esri.com/blogs/arcgisonline/esrilogo_new.png' /\u003e  This work is licensed under the Esri Master License Agreement.\u003c/p\u003e\u003cdiv\u003e\u003ca target='_blank' href='https://goto.arcgis.com/termsofuse/viewsummary' rel='nofollow ugc noopener noreferrer'\u003e\u003cstrong\u003eView Summary\u003c/strong\u003e\u003c/a\u003e | \u003ca target='_blank' href='https://goto.arcgis.com/termsofuse/viewtermsofuse' rel='nofollow ugc noopener noreferrer'\u003e\u003cstrong\u003eView Terms of Use\u003c/strong\u003e\u003c/a\u003e\u003c/div\u003e", 
  "accessInformation" : "Source: USGS, Esri", 
  "properties" : "System.Collections.Generic.Dictionary`2[System.String,System.Object]", 
  "access" : "public", 
  "size" : 8113414144
}