Opening GMW Files

The GMW file type is primarily associated with Global Mapper.

GMW	File extension: GMW
	File type:	Saving Projects

What is a GMW file?

GMW files mostly belong to Global Mapper. A .GMW file is a Global Mapper Workspace file primarily associated with Global Mapper, a comprehensive GIS software developed by Blue Marble Geographics. It stores the current project's state, including loaded data layers, active projections, analysis settings, and display configurations. This allows users to save and reload complex projects seamlessly, preserving their customized workspace environment. The .GMW file acts as a container, referencing external geospatial datasets rather than embedding the raw data itself, thus optimizing storage efficiency. It plays a crucial role in facilitating efficient workflows within Global Mapper for diverse geospatial tasks.

How to open GMW files

You need a suitable software like Global Mapper to open a GMW file. You need a suitable software like Global Mapper to open a GMW file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your GMW file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a GMW file directly in the browser:. Just drag the file onto this browser window and drop it.

Online GMW Text Viewer

Choose your .gmw file to analyze

or drag and drop it here

Online File Viewer

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What to Do When a .GMW File Fails to Open

Because .GMW files can originate from different applications, they aren't universally openable.

Identify the Source: If received from a GIS professional, it's likely a Global Mapper Workspace. If from a developer, it may be a script.
Check the Header: Inspect the opening lines in a text editor or hex viewer.
- Readable text with file paths suggests a Global Mapper project.
- "PK" indicates a zipped archive.
- Binary gibberish implies a proprietary format.
Use the Original Software: The original program is usually required; try Global Mapper, or ask the sender if uncertain.
Use this Webpage: Drag and drop your file here to detect its format, extract readable metadata, and preview contents when possible.

Technical Data for GMW File Extension

File classification:

GIS File

Related files:

gwm, gmv, gmp

a gmw Saving Project is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with GMW files

Associate the GMW file extension with the correct application.
Update your software that should actually open saving projects. Because only the current version supports the latest GMW file format. Search, therefore, e.g. on the manufacturer website after an available Global Mapper update.
To make sure that your GMW file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .GMW file online - secure, fast, and no downloads needed.