Africa Surficial Lithology

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 Surficial Lithology layer maps the geology of Africa into 20 classes based bedrock type and the distribution of unconsolidated surface material. The data available through this layer map the key geological features that affect the distribution of plants and ecosystems in Africa. This layer provides access to a 100m cell sized raster compiled from multiple sources. The data covers Africa, Madagascar, and other Islands near Africa. It was published by the U.S. Geological Survey and The Nature Conservancy in 2009. 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《From Vector to Raster》（矢量转栅格）博客中的步骤作为该服务的替代方案。Esri建议您更新相关地图与应用程序。 本数据集系美国地质调查局（U.S. Geological Survey，USGS）非洲生态系统测绘项目的产出成果之一，非洲表层岩性（Africa Surficial Lithology）图层基于基岩类型与未固结表层物质的分布特征，将非洲地质划分为20个类别。该图层所映射的核心地质特征，会对非洲境内植物与生态系统的分布产生显著影响。本图层提供分辨率为100米的栅格（raster）数据，该数据由多源信息整合编译而成，覆盖范围涵盖非洲、马达加斯加及非洲周边其他岛屿。该数据集于2009年由美国地质调查局（USGS）与大自然保护协会（The Nature Conservancy，TNC）联合发布。 数据集摘要分析：受限单源分析。单次分析的最大尺寸为24000×24000像素。 您可通过本图层使用查询、识别与导出影像服务。上述服务均受限于24000×24000像素的尺寸上限，对应边长约2400公里的区域范围。受限单源分析意味着本图层存在分析尺寸约束，不建议与其他图层开展多源联合分析。