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Layer: Less than 4000 (ID: 3)

Name: Less than 4000

Display Field: NAME

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: As part of the Clay County stormwater master plan, Jones Edmunds produced 1-foot contours from the USGS 2018 LiDAR Digital Elevation Model (DEM). Jones Edmunds developed the contours based on the DEM (tif files) that Jones Edmunds downloaded from the USGS website in August 2022 ( The elevations are in feet (NAVD88) and referenced to Geoid 12B. The stated accuracy of the DEM that the contours were derived from is 9.8 cm (0.32 feet or 4.8 inches) at the 5-percent confidence level in non-vegetated open terrain (USGS Data Validation Report - FL_Peninsular_FDEM_Clay_2018 - 2021-05-20).Jones Edmunds mosaiced the individual tif files in ArcPro 2.9 to produce a countywide DEM. Jones Edmunds then used Global Mapper version 24 to produce contours from the USGS DEM. Jones Edmunds tested the accuracy of the contours by comparing the contour elevation to the raster DEM elevation at more than 3 million points. Jones Edmunds found that 96 percent of the sampled points were within 0.5 foot of the DEM elevation and 70 percent of the points were within 0.25 foot of the DEM elevation.

Definition Expression: N/A

Copyright Text: USGS, FDEM, Clay County, Jones Edmunds & Associates

Default Visibility: true

MaxRecordCount: 1000

Supported Query Formats: JSON, AMF

Min Scale: 3999

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: true

Can Modify Layer: false

Can Scale Symbols: false

Use Standardized Queries: true

Drawing Info: Advanced Query Capabilities:
HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Supported Operations:   Query   Generate Renderer   Return Updates