View In:   ArcGIS Online Map Viewer

Name: SC_HU8_Streams

Display Field: name

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: Small stream centerlines were developed for a dual purpose. The first was to be used to create hydrography for the Iowa DNR's statewide floodplain mapping project in accordance with the Rebuild Iowa Advisory Commission’s 120-Day report to the Governor in November of 2008. The second was to be used to conflate data from the National Hydrography Dataset (NHD) to a more accurate resolution stream network in order to be consistent with the already existing NHD framework. For this reason streams start at 24 acres of flow accumulation where there is a visible channel in the surface of a Digital Elevation Model (DEM) based on the State of Iowa’s LiDAR collection. This linework was the basis for creating hydrologically corrected DEMs that were used to determine the one square mile starting point for modeling flood plains, per FEMA standards and specifications. The linework has been collected using the State of Iowa’s Statewide LiDAR product as the main determination for flow as this surface was used when carrying out Iowa’s Statewide Flood Plain Mapping Project. In cases where LiDAR was insufficient for capture, aerial photography from various years for the State of Iowa was referenced. The NRCSs Eight-Digit Hydrologic Unit boundaries (HUC8) is the Federal Emergency Management Agencies (FEMA) specified unit of study for flood plain mapping designations. Rather than studying by county, FEMA realized that more accurate products resulted from considering an entire HUC8 and gave a more complete look at what contributed/minimized flood damage. Therefore all data was initially compiled into HUC8s, then further compiled into this statewide dataset.

Service Item Id: 0a7f933b89294c849a70373dddf934a2

Copyright Text:

Default Visibility: false

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0.0

Max Scale: 0.0

Supports Advanced Queries: true

Supports Statistics: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

Extent:

XMin: -91.67977203999999
YMin: 41.15131735700004
XMax: -90.15705707999996
YMax: 42.19841592500006
Spatial Reference: 4326  (4326)  LatestVCSWkid(0)

Drawing Info:

Renderer:
Simple Renderer:
Symbol:
Style: esriSLSSolid
Color: [115, 177, 255, 216]
Width: 1
Label: N/A
Description: N/A
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

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

HasZ: true

HasM: true

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field:

Fields:

• objectid_1 ( nullable: false, defaultValue: null, editable: false, length: 4, type: esriFieldTypeOID, modelName: OBJECTID_12, alias: OBJECTID_12 )
• objectid ( modelName: OBJECTID, nullable: true, editable: true, defaultValue: null, alias: OBJECTID, type: esriFieldTypeInteger )
• name ( modelName: Name, nullable: true, editable: true, defaultValue: null, length: 150, alias: Name, type: esriFieldTypeString )
• stream_type ( modelName: Stream_Type, nullable: true, editable: true, defaultValue: null, length: 5, alias: Stream_Type, type: esriFieldTypeString )
• nhdcode ( modelName: NHDCODE, nullable: true, editable: true, defaultValue: null, alias: NHDCODE, type: esriFieldTypeDouble )
• nhddesc ( modelName: NHDDesc, nullable: true, editable: true, defaultValue: null, length: 255, alias: NHDDesc, type: esriFieldTypeString )
• slope ( modelName: Slope, nullable: true, editable: true, defaultValue: null, alias: Slope, type: esriFieldTypeDouble )
• strm_order ( modelName: Strm_order, nullable: true, editable: true, defaultValue: null, alias: Strm_order, type: esriFieldTypeSmallInteger )
• sinuosity ( modelName: Sinuosity, nullable: true, editable: true, defaultValue: null, alias: Sinuosity, type: esriFieldTypeDouble )
• SHAPE__Length ( virtual: true, nullable: true, editable: false, defaultValue: null, alias: SHAPE__Length, type: esriFieldTypeDouble )

Templates:

• Name: SC_HU8_Streams
  Description:
  Prototype:
  strm_order: null
  sinuosity: null
  nhdcode: null
  name: null
  stream_type: null
  slope: null
  objectid: null
  nhddesc: null
  
  Drawing Tool: esriFeatureEditToolLine

Capabilities: Query

Sync Can Return Changes: true

Is Data Versioned: false

Supports Rollback On Failure: true

Supports ApplyEdits With Global Ids: false

Supports ApplyEdits By Upload Id: true

Supports Query With Historic Moment: false

Supports Coordinates Quantization: true

Child Resources:   Field Groups   Contingent Values

Supported Operations:   Query   Query Attachments   Query Analytic   Query Top Features   Query Bins   Append   Validate SQL   Generate Renderer   Return Updates   Metadata   Update Metadata