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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 erratic points 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
GSHHG - A Global Self-consistent, Hierarchical, High-resolution Geography Database
(Version 2.3.7 as of June 15, 2017)
''This article contains public domain text created by the U.S. Federal government, taken from the NOAA website a
' 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 points 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 is a public college and university system in Hawaii. The system confers associate, bachelor's, master's, and doctoral degrees through three universities, seven community colleges, an employment training center, ...
, and Dr. Walter H. F. Smith at the NOAA
The National Oceanic and Atmospheric Administration (NOAA ) is an American scientific and regulatory agency charged with forecasting weather, monitoring oceanic and atmospheric conditions, charting the seas, conducting deep-sea exploratio ...
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
GSHHG - A Global Self-consistent, Hierarchical, High-resolution Geography Database
(Version 2.3.7 as of June 15, 2017)
''This article contains public domain text created by the U.S. Federal government, taken from the NOAA website a
' Maps Geographical technology {{ocean-stub