FAQ
TOPOJSON to PGM Conversion
What are TOPOJSON files?
TOPOJSON is a compact text format for maps whose areas touch each other, such as countries, states, or districts. It extends GeoJSON with one important idea: instead of writing the outline of every area separately, it writes every shared border only once, and each area then lists the pieces of border it is made of. This removes the duplicate lines between neighbors, so a TopoJSON file is often many times smaller than the same map in GeoJSON, and it also keeps the information about which areas share a border. Because of its small size, the format is popular for maps on web pages, where files have to be downloaded quickly. The files have the .topojson extension, although .json is also used.
What are PGM files?
The PGM or Portable Graymap format is part of a package of open source graphics programs called Netpbm. Other Netpbm formats include PPM (Portable Pixmap) and PBM (Portable Bitmap), also known under the collective name of PNM (Portable Anymap). A PGM file includes a grayscale image, can work on a UNIX platform, as well as on Windows or Mac OS X, and can render a scope of up to 255 grayscale colors.
Can reaConverter convert TOPOJSON to PGM?
Yes! reaConverter instantly converts .topojson to .pgm 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 TOPOJSON to PGM 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 TOPOJSON to PGM online?
If you only need to convert a few TOPOJSON files to PGM format, feel free to try our free online free online TOPOJSON to PGM converter — perfect for small batches with no installation needed!
How can I turn TOPOJSON files into PGM on my computer?
The best way to change TOPOJSONs to PGMs 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 TOPOJSON to PGM.
How can I automate TOPOJSON to PGM 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 TOPOJSON files to PGM using the command prompt?
reaConverter provides full access to all its features via Windows command line, including a high-performance command-line topojson to pgm converter for batch processing.
What else can I do with reaConverter?
Change format settingsCopy metadata (EXIF, IPTC)Vectorize imagesSet bit depthConvert Gerber files
Related conversions
Other ways to convert TOPOJSON files, and other sources that convert to PGM.
