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PGM in het kort
PGM
PBM, PGM, PPM, PNM, and later PAM come from the tool-centric tradition of keeping image interchange formats easy to parse, script, and transform.
SVGZ in het kort
SVGZ
SVG was developed by the W3C SVG Working Group starting in 1998, after six competing vector graphics submissions. SVG 1.0 became a W3C Recommendation on 4 September 2001, with SVGZ as the compressed variant.
Formaatvergelijking
| Kenmerk | PGM | SVGZ |
|---|---|---|
| File type | Image | Vector |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1988 | 2001 |
| Inventor | Jef Poskanzer / Netpbm lineage | World Wide Web Consortium (W3C) |
| Status | active | active |
| Transparency | Niet ondersteund | Niet ondersteund |
| Animation | Niet ondersteund | Niet ondersteund |
| Primary use cases |
|
|
| Layer support | Niet ondersteund | Niet ondersteund |
| Vector scaling | Niet ondersteund | Ondersteund |
Wanneer je elk formaat gebruikt
When to use PGM
- Your source file is already in PGM.
- Preserve source expectations before exporting to SVGZ.
- PGM is commonly used in image workflows.
When to use SVGZ
- Your target workflow expects SVGZ.
- Improve delivery compatibility with SVGZ.
- SVGZ is commonly used in vector workflows.
Veelgestelde vragen
Why convert PGM to SVGZ?
Convert to SVGZ when you need SVG semantics but want the file itself stored or transmitted in compressed form.
It is most useful for web asset pipelines, map layers, and technical graphics repositories where vector fidelity matters and pre-compressed files are already part of the deployment model.
If the downstream environment already applies gzip or brotli to ordinary SVG responses, plain SVG is often easier to work with.
Choose SVGZ when the consumer explicitly expects it or when archived asset size is worth prioritizing.
What changes when converting PGM to SVGZ?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to SVGZ adds vector scaling.
What should I review after converting PGM to SVGZ?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.