GTOPO30: Global 30 Arc-Second Elevation
GTOPO30 is a global digital elevation model (DEM) with a horizontal grid spacing of 30 arc seconds (approximately 1 kilometer). The DEM was derived from several raster and vector sources of topographic information. Completed in late 1996, GTOPO30 was developed over a three-year period through a collaborative effort led by the U.S. Geological Survey's Center for Earth Resources Observation and Science (EROS). The following organizations participated by contributing funding or source data: the National Aeronautics and Space Administration (NASA), the United Nations Environment Programme/Global Resource Information Database (UNEP/GRID), the U.S. Agency for International Development (USAID), the Instituto Nacional de Estadistica Geografica e Informatica (INEGI) of Mexico, the Geographical Survey Institute (GSI) of Japan, Manaaki Whenua Landcare Research of New Zealand, and the Scientific Committee on Antarctic Research (SCAR).
GTOPO30是一个全球数字高程模型(DEM),水平网格间距为30角秒(约1公里)。该DEM是由几个光栅和矢量来源的地形信息得出的。GTOPO30于1996年底完成,通过美国地质调查局的地球资源观测和科学中心(EROS)领导的合作努力,历时三年开发。以下组织通过提供资金或源数据参与其中:美国国家航空航天局(NASA)、联合国环境规划署/全球资源信息数据库(UNEP/GRID)、美国国际开发署(USAID)、墨西哥国家地理信息系统研究所(INEGI)、日本地理测量研究所(GSI)、新西兰Manaaki Whenua Landcare Research和南极研究科学委员会(SCAR)。
Dataset Availability
1996-01-01T00:00:00 - 1996-01-01T00:00:00
Dataset Provider
United States Geological Survey
Collection Snippet
Copied
ee.Image("USGS/GTOPO30")
Bands Table
Name | Description | Min* | Max* | Resolution | Units |
elevation | Elevation | -407 | 8752 | 927.67 meters | Meters |
* = Values are estimated
代码:
var dataset = ee.Image('USGS/GTOPO30'); var elevation = dataset.select('elevation'); var elevationVis = { min: -10.0, max: 8000.0, gamma: 1.6, }; Map.setCenter(11.69, 43.9, 4); Map.addLayer(elevation, elevationVis, 'Elevation');