The U.S. Geological Survey (USGS) released an extremely popular global DEM data set into the public domain several years ago.

前几年，美国地质调查局 (USGS) 向公共领域发布了一个非常受欢迎的全球 DEM 数据集。

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The USGS publishes its earthquake data in the form of a weekly CSV (or comma-separated values) file.

USGS 以 CSV（或逗号分隔值）文件的格式发布每周地震数据。

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To start, you need to get the USGS "legacy" data imported into your database.

首先，需要将 USGS “遗留” 数据导入到数据库。

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The USGS scientists, using tide gauge data and computer modeling, believe that a combination of factors, including the pressures of favorable ocean currents, has actually suppressed sea levels for a time, but that time ended two decades ago, and now the trend is headed upward, much faster than elsewhere.

FORBES: Rising Seas Along the East Coast