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DOT at a glance
DOT
DOT belongs to the classic binary Office period when document templates were central to controlling letterheads, forms, internal reports, and standardized authoring behavior.
PGM at a glance
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.
Format comparison
| Feature | DOT | PGM |
|---|---|---|
| File type | Document | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1989 | 1988 |
| Inventor | Microsoft | Jef Poskanzer / Netpbm lineage |
| Status | active | active |
| Primary use cases |
|
|
| Vector scaling | Not supported | Not supported |
When to use each format
When to use DOT
- Your source file is already in DOT.
- Preserve source expectations before exporting to PGM.
- DOT is commonly used in document workflows.
When to use PGM
- Your target workflow expects PGM.
- Improve delivery compatibility with PGM.
- PGM is commonly used in image workflows.
FAQs
Why convert DOT to 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.
What changes when converting DOT to PGM?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting DOT to PGM?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.