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GSHHG (Global Self-consistent, Hierarchical, High-resolution Geography Database; formerly ''Global Self-consistent, Hierarchical, High-resolution Shoreline Database'' (''GSHHS'')) is a high-resolution shoreline data set amalgamated from two data bases (the CIA world database WDBII, and the World Vector Shoreline database) in the public domain. The data have undergone extensive processing and are free of internal inconsistencies such as
' Maps Geographical technology {{ocean-stub
GSHHG (Global Self-consistent, Hierarchical, High-resolution Geography Database; formerly ''Global Self-consistent, Hierarchical, High-resolution Shoreline Database'' (''GSHHS'')) is a high-resolution shoreline data set amalgamated from two data bases (the CIA world database WDBII, and the World Vector Shoreline database) in the public domain. The data have undergone extensive processing and are free of internal inconsistencies such as erratic point Erratic Point is a small, moss-covered point at the head of South West Bay, northeast of Cape Gazert, on the west side of Heard Island in the southern Indian Ocean. The First German Antarctica Expedition in 1902 charted a cape in this vicinity, fro ...
s and crossing segments. The shorelines are constructed entirely from hierarchically arranged closed polygons. The four-level hierarchy is as follows: seashore, lakes, islands within lakes, ponds within islands within lakes.
The data can be used to simplify data searches and data selections, or to study the statistical characteristics of shorelines and land-masses. It comes with access software and routines to facilitate decimation based on a standard line-reduction algorithm.
GSHHS is developed and maintained by Dr. Paul Wessel at the University of Hawaiʻi
The University of Hawaiʻi System, formally the University of Hawaiʻi and popularly known as UH, is a public college and university system that confers associate, bachelor's, master's, and doctoral degrees through three universities, seven com ...
, and Dr. Walter H. F. Smith at the NOAA
The National Oceanic and Atmospheric Administration (abbreviated as NOAA ) is an United States scientific and regulatory agency within the United States Department of Commerce that forecasts weather, monitors oceanic and atmospheric conditio ...
Laboratory for Satellite Altimetry.
See also
*Vector Map
The Vector Map (VMAP), also called Vector Smart Map, is a vector-based collection of geographic information system (GIS) data about Earth at various levels of detail. Level 0 (low resolution) coverage is global and entirely in the public domain. L ...
, a vector based collection of GIS data covering the earth
References
*External links
*http://www.soest.hawaii.edu/pwessel/gshhg/ (Version 2.3.7 as of June 15, 2017) *http://www.ngdc.noaa.gov/mgg/shorelines/gshhs.html ''This article contains public domain text created by the U.S. Federal government, taken from the NOAA website a' Maps Geographical technology {{ocean-stub