ETOPO1, Global 1 Arc-minute Ocean Depth and Land Elevation from the US National Geophysical Data Center (NGDC)

ETOPO1 is a 1 arc-minute global relief model of Earth's surface that integrates land topography and ocean bathymetry. It was built from numerous global and regional data sets, and is available in "Ice Surface" (top of Antarctic and Greenland ice sheets) and "Bedrock" (base of the ice sheets) versions. Data are available in two grid registrations. For grid/node-registration, cells are centered on lines of latitude and longitude (21601 by 10801 cells), and for cell/pixel-registration, cell edges are along lines of latitude and longitude (21600 by 10800 cells). The grid-registered is the authoritative registration. The cell-registered is derived from the grid-registered, and the conversion produces slightly flattened relief.

ETOPO1（ETOPO1）是一款1弧分分辨率的全球地表高程模型，整合了陆地地形与海洋水深测深数据。本数据集依托大量全球及区域数据集构建，提供"Ice Surface"（南极与格陵兰冰盖顶部）与"Bedrock"（冰盖底部）两种数据版本。其数据包含两种网格配准方式：其一为网格/节点配准模式，单元格以经纬线为中心，网格规模为21601×10801；其二为单元格/像素配准模式，单元格边缘与经纬线对齐，网格规模为21600×10800。其中网格配准版为官方标准版本，单元格配准版由网格配准版转换生成，该转换过程会使地形起伏略微被扁平化。

搜集汇总

背景与挑战

背景概述

ETOPO1是一个全球1弧分钟分辨率的地形数据集，整合了陆地高程和海洋深度信息，用于地球表面地形建模。它提供两种版本（冰面和基岩）和网格配准方式，覆盖全球范围（-180°至180°经度，-90°至90°纬度），数据来源于美国国家地球物理数据中心（NGDC）。