Name: PortneufExtent1941

Display Field: Type

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This dataset shows the Portneuf prior to installation of the Concrete Channel, though Levees had been introduced. It was created as one of a series of datasets to analyze how engineering of a riparian ecosystem changed the environment over time. It includes cut-off channels and meanders that could increase river length and vegetation habitat in this riparian ecosystem. The vector files representing the Portneuf River for the 1941 were derived from two air photos taken from 9/13/1941 and 11/15/1941 (???????????). The workflow for the 1941 dataset is as follows. A vector file was created and manually digitized from the raster. Oxbows (cut off meanders/channels) and river features were coded as a “type” attribute within the attribute table. From here the data was smoothed using the PAEK algorithm with a smoothing tolerance of 20 meters to eliminate sharp corners.

Copyright Text: Jared Ogle oglejare@isu.edu; Idaho State University, Pocatello, ID 83209 Donna Delparte delparte@isu.edu; Idaho State University, Pocatello, ID 83209

Min. Scale: 0

Max. Scale: 0

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

XMin: 2623884.2958719
YMin: 1290807.27616742
XMax: 2632099.65715059
YMax: 1300077.26717761
Spatial Reference: 102605 (8826)

Drawing Info:

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HasZ: false

HasM: false

Has Attachments: false

Has Geometry Properties: true

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Object ID Field: OBJECTID

Unique ID Field:

Name : OBJECTID

IsSystemMaintained : True

Global ID Field:

Type ID Field:

Fields:

• OBJECTID (type: esriFieldTypeOID, alias: FID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
• Id (type: esriFieldTypeInteger, alias: Id, SQL Type: sqlTypeOther, nullable: true, editable: true)
• ORIG_FID (type: esriFieldTypeInteger, alias: ORIG_FID, SQL Type: sqlTypeOther, nullable: true, editable: true)
• Type (type: esriFieldTypeString, alias: Type, SQL Type: sqlTypeOther, length: 50, nullable: true, editable: true)
• Shape_Leng (type: esriFieldTypeDouble, alias: Shape_Leng, SQL Type: sqlTypeOther, nullable: true, editable: true)
• Shape__Area (type: esriFieldTypeDouble, alias: Shape__Area, SQL Type: sqlTypeDouble, nullable: true, editable: false)
• Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)

Templates:

Name: PortneufExtent1941
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 8/19/2026 9:15:40 PM

Schema Last Edit Date: 8/19/2026 9:15:40 PM

Data Last Edit Date: 8/18/2026 10:04:41 PM

Supported Operations:   Query   Query Pivot   Query Top Features   Query Analytic   Query Bins   Generate Renderer   Validate SQL   Get Estimates   ConvertFormat