Name: DtDEM_2022_1ft_WebMerc

Display Field:

Type: Raster Layer

Geometry Type: null

Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This is a raster with 1-ft cell resolution representing a detrended version of the ArcGIS Terrain dataset, "2022 Trinity River Focal Reach Digital Terrain" (YT TSP 2023). For further details of the source data can be found in: Pryor, C., T. Grey, and B. Hocker. 2023. 2022 Trinity River focal reach digital terrain model survey report. Report for the Trinity River Restoration Program (TRRP). Yurok Tribal Fisheries Program, Arcata, California. Available: https://www.trrp.net/library/document?id=2627.</SPAN></P><P><SPAN>Detrending used a mass point file derived from wetted cells (water depth &gt; 0) in the 2022 SRH2D modeled flow output for 450cfs, along with the 2022 DTM's "Terrain_Extent" polygon data plus a regional buffer to create a "hydro-planar" Terrain surface that represents the water surface from the source data. The regional buffer was created by buffering the "Terrain_Extent" polygon by 1,000,000 feet. Elevation for the regional buffer was set to a uniform 1596.69 ft* as previously used for the elevation mid-point of the focal reach. Both the original DTM and this hydro-planar surface were converted to 1 ft resolution rasters. The hydro-planer raster was then subtracted from the DTM-derived raster (a DEM) to yield this Detrended Digital Elevation Model (DtDEM)</SPAN></P><P><SPAN>* = This elevation is the midpoint between the water surface elevation at the lower end of the DTM and the water surface elevation immediately below Lewiston Dam. While this uniform elevation theoretically could make water flow out of the river near the dam (river is higher than the value of 1596.69) and into the river near the North Fork, the slope created by this is minuscule. At the upper and lower ends of the river where this potential slope would be greatest, it could account for only about 0.025 ft elevation per 100 feet lateral to the river.</SPAN></P><P><SPAN>Citation: Yurok Tribe Fisheries Department Design and Technical Services Program (YT TSP), 2023. Data Package for 2022 Trinity River Focal Reach Digital Terrain. </SPAN></P></DIV></DIV></DIV>

Service Item Id: 7733ee9f17de48b892ec2d67a963fa5c

Copyright Text: Conversion by Trinity River Restoration Program from data provided by YT TSP.

Default Visibility: true

MaxRecordCount: 0

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: false

Supports Statistics: false

Has Labels: false

Can Modify Layer: false

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -1.3706923620521413E7
YMin: 4959074.29358897
XMax: -1.366816608940635E7
YMax: 4979513.308066999
Spatial Reference: 102100  (3857)

Drawing Info:

N/A

Advanced Query Capabilities:

Supports Statistics: false
Supports OrderBy: false
Supports Distinct: false
Supports Pagination: false
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: false
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeNone

Type ID Field: null

Fields: None


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

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