View In:   ArcGIS Online Map Viewer

Name: Contour_Tile_Regions_2018

Display Field: section

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This dataset represents the regional areas used for processing and organizing the elevation contours covering Napa County at a 2-foot interval. Contour extents were clipped such that they extend 100-ft. beyond the county boundary.</SPAN></P><P><SPAN>Elevation data was derived from bare-earth surface digital elevation models (DEMs) created from LiDAR data flown in 2018 in response to the widespread 2017 fires in Northern California as part of ongoing nationwide 3DEP (U.S. Geological Survey 3D Elevation Program) efforts.</SPAN></P><P><SPAN>In limited areas, located along the western edge of the county boundary, supplemental DEMs were acquired from other sources to fill in gaps in the 3DEP data. Use of this supplemental data was negligible, totaling 24 acres out of 507,475 acres countywide (0.005% of total land area).</SPAN></P><P><SPAN>All DEM tiles (n=41) were merged into a single mosaic. Due to computing limitations, the mosaic was cut into three sections (north, central, and south) of roughly equal size for processing purposes. Two-foot contour lines were generated for each section, then further divided into 1-mile x 1-mile tiles, for a total or 886 tiles.</SPAN></P><P><SPAN>For metadata or details about the contours themselves, see the individual GIS files metadata.</SPAN></P></DIV></DIV></DIV>

Service Item Id: 075a7453c17a49eea2ae2cb312d259d5

Copyright Text: Napa County Planning, Building, and Environmental Services Department, 2022

Default Visibility: false

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

Extent:

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YMin: 1812888.4729664773
XMax: 6545732.5917312205
YMax: 2076888.472852558
Spatial Reference: 102642  (2226)

Drawing Info:

Renderer:
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Field 2: N/A
Field 3: N/A
Field Delimiter: ,
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HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: section

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Capabilities: Query

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