Services Directory - GEBCO_contours(MapServer)

GEBCO_contours (Map Service)

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Current Version: 10.81

Service Description: This tiled map service displays bathymetric contours derived from the General Bathymetric Chart of the Oceans GEBCO_2023 grid, which is a global bathymetry compilation at 15 arc-second resolution. Depths are displayed in meters. At large scales (1:5,000,000 and closer), the contour interval is 500m; at medium scales (1:5,000,000 to 1:30,000,000) the contour interval is 1000m; and at small scales (1:30,000,000 and greater), the contour interval is 2000m. Supplementary contours are shown in shallow waters (less than 500m).

A "smoothing" process was done in ArcGIS Pro to generate these contours:

Create a version of the GEBCO grid using the Convolution raster function "Smoothing 3x3" option.
Generate contours at selected intervals using "Contour List".
Generalize the contours using "Simplify Line" with a tolerance of 0.005 degrees.

These contours are also available as a downloadable file geodatabase.

Please also see NOAA/NCEI's color shaded-relief visualization of the GEBCO grid.

See here for a map with both hillshade and contours included.

Map Name: Layers

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Description: This tiled map service displays bathymetric contours derived from the General Bathymetric Chart of the Oceans GEBCO_2023 grid, which is a global bathymetry compilation at 15 arc-second resolution. Depths are displayed in meters. At large scales (1:5,000,000 and closer), the contour interval is 500m; at medium scales (1:5,000,000 to 1:30,000,000) the contour interval is 1000m; and at small scales (1:30,000,000 and greater), the contour interval is 2000m. Supplementary contours are shown in shallow waters (less than 500m).

A "smoothing" process was done in ArcGIS Pro to generate these contours:

Create a version of the GEBCO grid using the Convolution raster function "Smoothing 3x3" option.
Generate contours at selected intervals using "Contour List".
Generalize the contours using "Simplify Line" with a tolerance of 0.005 degrees.

These contours are also available as a downloadable file geodatabase.

Please also see NOAA/NCEI's color shaded-relief visualization of the GEBCO grid.

See here for a map with both hillshade and contours included.

Copyright Text: General Bathymetric Chart of the Oceans (GEBCO); NOAA National Centers for Environmental Information (NCEI)

Spatial Reference:
102100

Single Fused Map Cache: true

Capabilities: Map,TilesOnly,Tilemap

Tile Info:

Height: 256
Width: 256
DPI: 96
Levels of Detail: (# Levels: 24)

Level ID: 0 [Start Tile, End Tile]
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Level ID: 21 [Start Tile, End Tile]
Level ID: 22 [Start Tile, End Tile]
Level ID: 23 [Start Tile, End Tile]

Format: PNG32
Compression Quality: 0
Origin:
Spatial Reference:
102100

Initial Extent:

Full Extent:

Min Scale: 5.91657527591555E8
Max Scale: 577790.554289

Min LOD: 0
Max LOD: 23

Units: esriMeters

Supported Image Format Types: PNG32

Export Tiles Allowed: false
Max Export Tiles Count: 100000

Resampling: true

Document Info:

Title: GEBCO Bathymetric Contours (NOAA NCEI Visualization)
Author: ncei_noaa
Comments:
Subject: Labeled bathymetric contours derived from the General Bathymetric Chart of the Oceans (GEBCO) GEBCO_2023 global land and seafloor elevation dataset.
Category:
Keywords: GEBCO, bathymetry, contours, NOAA, NCEI, IHO DCDB, GEBCO_2023