FAQ
H4 to CG4 Conversion
What are H4 files?
H4 is a file extension used for HDF4 (Hierarchical Data Format, Release 4), a general-purpose format for scientific data created at the National Center for Supercomputing Applications (NCSA) in the United States and now maintained by The HDF Group. A file works as a container in which many kinds of data are stored together with descriptions of what they are: large arrays of measurements, images with color palettes, tables, and notes. Because it is independent of the computer that created it, it became a favorite of researchers. In 1993, NASA chose HDF4 as the format for data from its Earth Observing System, and satellite products such as those from the MODIS instrument were distributed in it for many years. The same files often use the .hdf extension.
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 H4 to CG4?
Yes! reaConverter instantly converts .h4 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 H4 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 H4 to CG4 online?
If you only need to convert a few H4 files to CG4 format, feel free to try our free online free online H4 to CG4 converter — perfect for small batches with no installation needed!
How can I turn H4 files into CG4 on my computer?
The best way to change H4s 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 H4 to CG4.
How can I automate H4 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 H4 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 h4 to cg4 converter for batch processing.
What else can I do with reaConverter?
Convert RAW photo formatsConvert vector filesChange image DPIConvert whole-slide imagesPicture resizer
Related conversions
Other ways to convert H4 files, and other sources that convert to CG4.
