Name: NHD Flowlines

Display Field: GNIS_NAME

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: This dataset comprises National Hydrology Dataset (NHD) flowline data for the two HU6 (hydrographic units level 6) that intersect San Diego County (i.e. Laguna-San Diego Coastal and Salton Sea units). NHD data was downloaded in FGDB format for HU-4 (SubRegion) for NHD_H_1810_HU4 and NHD_H1807_HU4 from https://apps.nationalmap.gov/downloader/ Features from NHDFlowline feature class from NHD_H_1810_HU4 and NHD_H1807_HU4 were selected that intersect the two HU6 units and were projected to NAD83 State Plane Coordinate System.NHDFlowlines consist of routes that make up a linear surface water drainage network. Flowlines have a reach code and a measure, allowing for the establishment of upstream/downstream relationships. This network allows for powerful analysis and modeling capabilities.The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.Statements of horizontal positional accuracy are based on accuracy statements made for U.S. Geological Survey topographic quadrangle maps. These maps were compiled to meet National Map Accuracy Standards. For horizontal accuracy, this standard is met if at least 90 percent of points tested are within 0.02 inch (at map scale) of the true position. Additional offsets to positions may have been introduced where feature density is high to improve the legibility of map symbols. In addition, the digitizing of maps is estimated to contain a horizontal positional error of less than or equal to 0.003 inch standard error (at map scale) in the two component directions relative to the source maps. Visual comparison between the map graphic (including digital scans of the graphic) and plots or digital displays of points, lines, and areas, is used as control to assess the positional accuracy of digital data. Digital map elements along the adjoining edges of data sets are aligned if they are within a 0.02 inch tolerance (at map scale). Features with like dimensionality (for example, features that all are delineated with lines), with or without like characteristics, that are within the tolerance are aligned by moving the features equally to a common point. Features outside the tolerance are not moved; instead, a feature of type connector is added to join the features. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table.

Service Item Id: a48e8eeca8f640e480ceec1222f1dde9

Copyright Text: U.S. Geological Survey in cooperation with SanGIS, U.S. Protection Agency, State Cooperators, U.S. Forest Service, National Geospatial Technical Operations Center and INEGI for data within Mexico.

Default Visibility: false

MaxRecordCount: 2000

MaxSelectionCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 100000.0

Max Scale: 0.0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -1.3117764559117815E7
YMin: 3780445.885025286
XMax: -1.2767461217260739E7
YMax: 4051315.036346591
Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: fcode
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
UniqueValueInfos:
• Value: 46000
  Label: Perennial
  Description: N/A
  Symbol:
  Style: esriSLSSolid
  Color: [69, 168, 181, 255]
  Width: 2
• Value: 46006
  Label: Perennial
  Description: N/A
  Symbol:
  Style: esriSLSSolid
  Color: [69, 168, 181, 255]
  Width: 2
• Value: 46003
  Label: Intermittent
  Description: N/A
  Symbol:
  Style: esriSLSSolid
  Color: [74, 182, 198, 255]
  Width: 1
• Value: 46007
  Label: Ephemeral
  Description: N/A
  Symbol:
  Style: esriSLSDashDotDot
  Color: [74, 182, 198, 255]
  Width: 1
Transparency: 0
Labeling Info:

Feature Draw Order:

N/A

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false
Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: true
Supports Time Relation: true
Supports Sql Format: false
Supports Query Analytic: false
Supports Query With Current User: true

HasZ: true

HasM: true

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• gnis_name ( type: esriFieldTypeString, alias: Name, length: 65 )
• fcode ( type: esriFieldTypeInteger, alias: Flow Category )
• mainpath ( type: esriFieldTypeInteger, alias: MainPath )
• innetwork ( type: esriFieldTypeInteger, alias: InNetwork )
• visibilityfilter ( type: esriFieldTypeInteger, alias: VisibilityFilter )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata