FAQ
GVB to CAL Conversion
What are GVB files?
GVB is a datum grid shift file that follows the NTv2 (National Transformation version 2) model, created by the Geodetic Survey of Natural Resources Canada. Such a file helps convert map coordinates between two geodetic datums, which are different mathematical models of the Earth, so that old and new survey data line up correctly. It covers an area with a net of points and stores, for each of them, how far latitude and longitude have to be moved, usually with an estimate of the accuracy of the shift. A program finds the points nearest to a location and calculates the exact correction between them. Files with this structure are used by national mapping agencies and surveyors, and they are particularly valuable for cadastral and engineering work, where small errors matter.
What are CAL files?
A CAL image file represents a monochrome bitmap image that uses the CALS raster image standard for storing graphics data. This standard was created in the 1980s by the US Department of Defence as a compressed interchangeable image format. CAL and CALS are extensions used for similar purposes.
Can reaConverter convert GVB to CAL?
Yes! reaConverter instantly converts .gvb to .cal 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 GVB to CAL 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 GVB to CAL online?
If you only need to convert a few GVB files to CAL format, feel free to try our free online free online GVB to CAL converter — perfect for small batches with no installation needed!
How can I turn GVB files into CAL on my computer?
The best way to change GVBs to CALs 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 GVB to CAL.
How can I automate GVB to CAL 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 GVB files to CAL using the command prompt?
reaConverter provides full access to all its features via Windows command line, including a high-performance command-line gvb to cal converter for batch processing.
What else can I do with reaConverter?
Convert vector filesChange image DPIChange format settingsCopy IPTC dataConvert CAD formats
Related conversions
Other ways to convert GVB files, and other sources that convert to CAL.
