A global geographic grid system for visualizing bathymetry

Ware, Colin; Mayer, Larry; Johnson, Paul; Jakobsson, Martin; Ferrini, Vicki

doi:10.5194/gi-9-375-2020

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i

A global geographic grid system for visualizing bathymetry

2020
By Ware, Colin ; Mayer, Larry ; Johnson, Paul ; ...
Source: Geoscientific Instrumentation, Methods and Data Systems, 9(2), 375-384

[PDF-4.76 MB]

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Details:

Journal Title:

Geoscientific Instrumentation, Methods and Data Systems
Personal Author:

Ware, Colin ; Mayer, Larry ; Johnson, Paul ; Jakobsson, Martin ; Ferrini, Vicki

Ware, Colin ; Mayer, Larry ; Johnson, Paul ; Jakobsson, Martin ; Ferrini, Vicki Less -
NOAA Program & Office:

NOS (National Ocean Service)
Description:

A global geographic grid system (Global GGS) is here introduced to support the display of gridded bathymetric data at whatever resolution is available in a visually seamless manner. The Global GGS combines a quadtree metagrid hierarchy with a system of compatible data grids. Metagrid nodes define the boundaries of data grids. Data grids are regular grids of depth values, coarse grids are used to represent sparse data and finer grids are used to represent high-resolution data. Both metagrids and data grids are defined in geographic coordinates to allow broad compatibility with the widest range of geospatial software packages. An important goal of the Global GGS is to support the meshing of adjacent tiles with different resolutions so as to create a seamless surface. This is accomplished by ensuring that abutting data grids either match exactly with respect to their grid-cell size or only differ by powers of 2. The oversampling of geographic data grids, which occurs towards the poles due to the convergence of meridians, is addressed by reducing the number of columns (longitude sampling) by powers of 2 at appropriate lines of latitude. In addition to the specification of the Global GGS, this paper describes a proof-of-concept implementation and some possible variants.
Keywords:

[+]

Information Visualization Submarine Topography Bathymetry
Source:

Geoscientific Instrumentation, Methods and Data Systems, 9(2), 375-384
DOI:

https://doi.org/10.5194/gi-9-375-2020
Document Type:

Journal Article
Funding:

Grant no. NA15NOS4000200
License:

https://creativecommons.org/licenses/by/4.0/
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CC BY
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Library
Main Document Checksum:

[+]

urn:sha256:1761e77d7c9d0aa7ee6c02645fa326959978f662a6d307a2b762e42e3d4227c7
Download URL:

https://repository.library.noaa.gov/view/noaa/51523/noaa_51523_DS1.pdf
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