Name: Stream - Ephemeral (NHD)

Display Field: GNIS_Name

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: Network "nme" Flow line initiation below 0.004 square km flow accumulation, based on a 141cm resample of the topo-bathy surface. The more detailed east Marin County extent featured intensive hydrologic enforcement that had been derived from the storm drain systems of about a dozen municipal or county agencies. The analysis grid was resampled near 141cm gridding for precise 2-square-meter grid cells. Flow line initiation below 0.004 square km flow accumulation, nominally 1-acre catchment, was used to detect likely ephemeral flow over highly impermeable urban surfaces common in this area. In many cases, hydrologic enforcement had detailed curb gutters on both sides of the street at better than 1:1000 map scale. This much detail led to stability problems for the 32-bit Esri ArcGIS 10.3 for Desktop application over which ArcHydro was running, and so the east county area was produced in two parts. This "nme" network was named to imply "north Marin east".

Copyright Text: County of Marin CDA, MarinMap consortium

Default Visibility: false

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 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: 5807780.046283439
YMin: 2055079.590617016
XMax: 6150989.499955028
YMax: 2435273.3453198522
Spatial Reference: 2872  (2872)

Drawing Info:

Renderer:
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Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
UniqueValueInfos:
• Value: 46007
  Label: Stream/River: Ephemeral
  Description: N/A
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Transparency: 0
Labeling Info:

Advanced Query Capabilities:

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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

HasZ: true

HasM: true

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

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• ReachCode ( type: esriFieldTypeString, alias: ReachCode, length: 14 )
• GNIS_ID ( type: esriFieldTypeString, alias: GNIS_ID, length: 10 )
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• VisibilityFilter ( type: esriFieldTypeInteger, alias: VisibilityFilter )

Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

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