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The Global Mapper Software Development Kit (SDK) provides a Windows DLL which allows much of the functionality of Global Mapper to be accessed from third applications.

Global Mapper SDK synchronizes the software developer toolkit with Global Mapper desktop software releases, which enables a more consistent release cycle. This ensures that software developers are able to work with the most current features and functions introduced to the desktop version of the software.

The SDK includes both native 32-bit and 64-bit DLLs, so you can target any Windows system. The Global Mapper SDK is a standard Windows DLL and can be called from just about any programming language on a Windows platform, including Visual C++, Visual Basic, Visual C#, and Java with JNI.

The latest version includes many scripting updates and additions, including support for calculating attributes, splitting layers, and interactively prompting users for files and folders. It adds new functionality to allow getting the original high-bit depth values from multi-band image layers. There is a new Filter/Noise/Median resampling method for removing noise from image and terrain layers. Also added is a new function to get the list of available online sources for load with GM_LoadOnlineLayer as well as support for custom tile filenames when doing a GM_ExportWebFormat call. In addition, many issues when using the SDK from multiple threads were fixed, making SDK calls less likely to need thread protection wrapped around them.