Global Gridded Geographically Based Economic (G-Econ) Data Set, Version 4

The Global Gridded Geographically Based Economic Data (G-Econ), Version 4 contains derived gridded one by one degree Gross Domestic Product (GDP) data in GRID and ASCII formats for both Market Exchange Rate (MER) and Purchasing Power Parity (PPP) for the years 1990, 1995, 2000 and 2005. MER is the exchange rate between local and U.S. dollar currencies for a given time period established by the market. PPP is the exchange rate between a country's currency and U.S. dollars adjusted to reflect the actual cost in U.S. dollars of purchasing a standardized market basket of goods in that country using the country's currency. The original data from the G-Econ Project at Yale University is also available in tabular format and includes latitude and longitude geographic coordinates of the grid cells, area of grid cells, as well as country names, distance to coast, elevation, vegetation, population, precipitation and temperature.

全球网格化地理经济数据（Global Gridded Geographically Based Economic Data, G-Econ）第4版包含衍生的1°×1°网格化国内生产总值（GDP）数据集，以GRID和ASCII格式存储，涵盖1990年、1995年、2000年及2005年的市场汇率（MER）与购买力平价（PPP）两种核算口径的结果。其中，市场汇率（MER）指特定时期内由市场形成的本币与美元之间的兑换比率；购买力平价（PPP）则是经调整后的一国货币与美元的兑换比率，用于体现使用该国货币在该国境内购买标准化商品篮子的实际美元成本。耶鲁大学G-Econ项目的原始数据同时提供表格格式版本，包含网格单元的经纬度地理坐标、网格单元面积，以及国家名称、距海岸距离、海拔、植被状况、人口规模、降水量与气温等信息。