AML

Arc Macro Language (AML) is a high-level scripting language developed by Esri for its ArcInfo Geographic Information System (GIS) software. It was created to automate repetitive GIS tasks, customize workflows, and extend the functionality of the ArcInfo Workstation environment. By writing AML scripts, users could execute complex sequences of commands automatically, reducing manual effort and improving efficiency in spatial data management. AML supports programming features such as variables, conditional statements, loops, menus, and user-defined functions, allowing the creation of customized GIS applications and interactive tools. It was widely used for tasks including map production, data conversion, spatial analysis, report generation, and geoprocessing. The language enabled organizations to standardize workflows and process large datasets with greater speed and accuracy. Before the introduction of ArcGIS Desktop and ArcGIS Pro, AML was the primary automation tool for Esri's workstation-based GIS software. Although it played a significant role in the evolution of GIS automation, AML has largely been replaced by Python, which offers greater flexibility, a larger ecosystem of libraries, and seamless integration with modern ArcGIS applications. Despite its decline in current software, AML remains an important part of GIS history and is still encountered in legacy systems maintained by some organizations.