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PGM at a glance
PGM
Convert to PGM when you need a straightforward grayscale raster for scripting, research, or low-overhead image processing.
It is a good target for technical pipelines and intermediate data exchange.
Xfig at a glance
Xfig
Technical diagrams and figures in Unix academic workflows, legacy Xfig drawing migration, and scientific publication figure production on Unix.
Format comparison
| Feature | PGM | Xfig |
|---|---|---|
| File type | Image | Vector |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | scalable |
| File size characteristics | medium | small |
| Compatibility | broad | moderate |
| Editability | moderate | high |
| Created year | 1988 | 1985 |
| Inventor | Jef Poskanzer / Netpbm lineage | Supoj Sutanthavibul |
| Status | active | legacy |
| Transparency | ❌ | ❌ |
| Animation | ❌ | ❌ |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | good |
| Metadata handling | moderate | moderate |
| Delivery profile | strong | strong |
| Workflow fit | delivery | design |
| Layer support | ❌ | ❌ |
| Vector scaling | ❌ | ✔️ |
When to use each format
When to use PGM
- capture ingest
- editing
- web or print delivery
- Very simple to parse and generate.
When to use Xfig
- illustration
- diagramming
- brand asset delivery
- Preserves object-level editability for technical diagrams.
FAQs
Why convert PGM to Xfig?
Technical diagrams and figures in Unix academic workflows, legacy Xfig drawing migration, and scientific publication figure production on Unix.
What changes when converting PGM to Xfig?
This conversion changes how the format behaves in downstream tools and delivery environments.
Size profile changes from medium in PGM to small in Xfig. Quality profile changes from depends in PGM to scalable in Xfig. Editability profile changes from moderate in PGM to high in Xfig. Compatibility profile changes from broad in PGM to moderate in Xfig. Archival profile changes from moderate in PGM to good in Xfig. Workflow profile changes from delivery in PGM to design in Xfig.
Moving to Xfig adds vector scaling.
What should I review after converting PGM to Xfig?
Check the exported file for Closely tied to the Xfig ecosystem and long-tail compatibility workflows.; Not a mainstream modern illustration exchange format..