Africa Topographic Moisture Potential

Retirement Notice: This item is in mature support as of August 2025 and will be retired in December 2026. Please use this source dataset and follow the steps in the From Vector to Raster blog as a replacement for this service. Esri recommends updating your maps and apps. Created as part of the USGS’s Africa Ecosystems Mapping project, the Africa Topographic Moisture Potential layer classifies the landscape of Africa as either uplands or as lowlands and other depressions. This layer provides access to a 100m cell size raster derived from SRTM and other data that divides the African landscape into upland and lowland areas. The data covers Africa, Madagascar, the Comoros Islands, and other coastal Islands near Africa. It was published in 2009 by the USGS Rocky Mountain Geographic Science Center. This layer was used as an input for the Africa Terrestrial Ecosystems mapping project. Dataset Summary Analysis: Restricted single source analysis. Maximum size of analysis is 24,000 x 24,000 pixels. What can you do with this layer? This layer has query, identify, and export image services available. The layer is restricted to a 24,000 x 24,000 pixel limit for these services, which represents an area roughly 2,400 kilometers on a side. Restricted single source analysis means this layer has size constraints for analysis and it is not recommended for use with other layers in multisource analysis.退役通知：本数据集自2025年8月起进入成熟支持阶段，并将于2026年12月正式退役。请使用本源数据集并遵循《从矢量到栅格（From Vector to Raster）》博客中的步骤作为本服务的替代方案。Esri建议您更新相关地图与应用程序。 作为美国地质调查局（USGS）非洲生态系统测绘项目的成果之一，非洲地形湿度潜力图层（Africa Topographic Moisture Potential layer）将非洲地表划分为高地与低地及其他洼地两类。该图层采用100米像元分辨率的栅格数据，源自航天飞机雷达地形测绘任务（SRTM）及其他相关数据源，用于区分非洲大陆的高地与低地区域。 数据覆盖范围包括非洲大陆、马达加斯加、科摩罗群岛及非洲周边其他沿海岛屿。该数据集于2009年由美国地质调查局落基山地理科学中心发布，并曾作为非洲陆地生态系统测绘项目的输入数据源使用。 数据集摘要分析说明：仅限单源分析。单次分析的最大尺寸限制为24,000×24,000像素。 您可通过该图层实现以下操作：查询、识别以及导出影像服务。上述服务均受24,000×24,000像素的尺寸限制，对应边长约2400公里的区域。受限单源分析意味着本图层存在分析尺寸约束，不建议与其他图层进行多源联合分析。