Global land cover is one of the essential terrestrial baseline datasets available for ecosystem modeling, however uncertainty remains an issue. Tools such as Google Earth offer enormous potential for land cover validation. With an ever increasing amount of very fine spatial resolution images (up to 50 cm x 50 cm) available on Google Earth, it is becoming possible for every Internet user (including non remote sensing experts) to distinguish land cover features with a high degree of reliability. Such an approach is inexpensive and allows Internet users from any region of the world to get involved in this global validation exercise. The Geo-Wiki Project is a global network of volunteers who wish to help improve the quality of global land cover maps. Since large differences occur between existing global land cover maps, current ecosystem and land-use science lacks crucial accurate data (e.g., to determine the potential of additional agricultural land available to grow crops in Africa), volunteers are asked to review hotspot maps of global land cover disagreement and determine, based on what they actually see in Google Earth and their local knowledge, if the land cover maps are correct or incorrect. Their input is recorded in a database, along with uploaded photos, to be used in the future for the creation of a new and improved hybrid global land cover map.
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机译：全球土地覆盖是可用于生态系统建模的基本陆地基线数据集之一，但是不确定性仍然是一个问题。 Google Earth之类的工具为土地覆被验证提供了巨大的潜力。随着Google Earth上越来越多的非常精细的空间分辨率图像（最大50 cm x 50 cm）的出现，每个互联网用户（包括非遥感专家）都可以高度区分土地覆盖特征。可靠性。这种方法价格便宜，并且允许来自世界任何地区的Internet用户参与此全局验证活动。 Geo-Wiki项目是一个由志愿者组成的全球网络，他们希望帮助改善全球土地覆盖图的质量。由于现有的全球土地覆盖图之间存在巨大差异，当前的生态系统和土地使用科学缺乏关键的准确数据（例如，无法确定可用于在非洲种植农作物的其他农业用地的潜力），因此，志愿者被要求审查全球热点地图。土地覆盖异议，并根据他们在Google地球中实际看到的内容和当地知识确定土地覆盖图是正确还是错误。他们的输入与上传的照片一起记录在数据库中，将来将用于创建新的和改进的混合全球土地覆盖图。
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