FAQ
JML to CG4 Conversion
What are JML files?
JML is the native vector format of OpenJUMP, a free GIS written in Java. The name stands for JUMP Geographic Markup Language, and the file is a text document in XML that stores one map layer: its points, lines, and polygons, together with a table of attributes for each object, such as names, numbers, and dates. It is a simplified variant of the GML standard, with the difference that the description of the attribute fields is placed at the beginning of the file itself, so the file can be opened without any extra template or schema. OpenJUMP grew out of JUMP, a project of Vivid Solutions, the authors of the widely used geometry library JTS, and JML files are still the easiest way to save and share layers between OpenJUMP users.
What are CG4 files?
CG4 is a raster format associated with CALS (Continuous Acquisition and Life-Cycle Support) — a program initiated by the US Department of Defense to capture and link military data. CG4 is compatible with a very limited number of digital graphics programs. Files with this extension contain a bitmap that often uses the CCITT4 compression, which is an old fax machine standard used for black-and-white images.
Can reaConverter convert JML to CG4?
Yes! reaConverter instantly converts .jml to .cg4 with perfect quality preservation. With its batch processing feature, you can convert multiple files at once in just a few clicks. You can even convert images directly from Windows Explorer using the right-click menu — fast and convenient.
What is reaConverter used for?
reaConverter is a Windows converter for 800+ formats, GIS data among them. For JML to CG4 it replaces the usual detour through QGIS, ArcGIS or ogr2ogr: add the files, pick the output format, and the whole batch converts offline. Surveyors, planners and engineering teams use it to pass data between GIS, CAD and everyday document formats.
Why choose offline conversion with reaConverter?
reaConverter is a software program that is used for offline files conversion. Your proprietary documents never leave your computer – essential for architects, engineers, healthcare and government contractors handling classified projects. Meets GDPR, HIPAA, CCPA, and corporate security policies by ensuring files never cross borders or third-party systems.
Can I convert JML to CG4 online?
If you only need to convert a few JML files to CG4 format, feel free to try our free online free online JML to CG4 converter — perfect for small batches with no installation needed!
How can I turn JML files into CG4 on my computer?
The best way to change JMLs to CG4s on your PC is to install a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from JML to CG4.
How can I automate JML to CG4 files conversion?
reaConverter supports all the most useful automation features such as right-click сonversion and Watch Folders for the most efficient automated files conversion in any software of this type.
Is there a way to convert JML files to CG4 using the command prompt?
reaConverter provides full access to all its features via Windows command line, including a high-performance command-line jml to cg4 converter for batch processing.
What else can I do with reaConverter?
Convert RAW filesConvert DICOM imagesCrop photoConvert raster to vectorChange bit depth
Related conversions
Other ways to convert JML files, and other sources that convert to CG4.
