Picture this: you're sitting at your computer, ready to photograph and catalog a newly acquired painting. You grab your camera, take the shot, and then stare at your screen wondering whether to save it as TIFF, JPEG, PNG, or something labeled "SVG" that your designer friend keeps mentioning. The file format you pick affects everything from storage space to print quality to how well your documentation holds up twenty years from now.
The core decision boils down to understanding vector versus raster graphics. These two approaches to storing visual information serve completely different purposes, and picking the wrong format can wreck your documentation workflow or blow up your storage budget.
What Makes Vector Graphics Different
Vector graphics store images as mathematical formulas rather than grids of colored dots. When you draw a circle in Adobe Illustrator, the file records the center point coordinates, radius, stroke width, and fill color as equations. Your computer recalculates those equations every time you open or resize the file.
This math-based approach delivers one massive advantage: infinite scalability. You can blow a vector logo up to billboard size or shrink it down to a business card, and it stays razor-sharp at every size. No pixelation, no blur, no quality loss. According to research from the University of Michigan Library, this makes vectors perfect for materials that need to reproduce cleanly across different media formats.
Vector files also stay small. A complex logo with dozens of curves might clock in at 200 KB, while a photograph of that same logo could run 5 MB at print resolution. When you're managing thousands of files, those storage differences add up fast.
When Raster Graphics Work Better
Raster images build visuals from tiny colored squares called pixels. Each pixel stores a specific color value, and millions of these pixels arranged in a grid create your final image. Think of it like a digital mosaic where each tile contributes to the overall picture.
Cameras, scanners, and photo editing tools all work in raster formats because pixels excel at capturing continuous color gradients, subtle lighting variations, and photographic detail. A sunset photograph might contain thousands of color transitions from deep purple to bright orange—something impossible to describe with simple geometric shapes.
The tradeoff comes with file size and scalability. A high-resolution scan of an 18x24 inch painting at 600 DPI contains roughly 126 million pixels. Stored as an uncompressed TIFF, that file hits 360 MB. And if you try stretching that scan to twice its original size, you'll see visible blur or blockiness as the software guesses what colors belong in the gaps between pixels.
Resolution Matters for Documentation Quality
Resolution determines how much detail a raster image captures. It's measured in DPI (dots per inch) or PPI (pixels per inch). For art documentation, these benchmarks apply:
- 72 DPI: Web display only, terrible for print or archival use
- 150 DPI: Minimum acceptable for basic documentation
- 300 DPI: Industry standard for insurance claims and print reproduction
- 600 DPI or higher: Archival-grade captures for museum-quality documentation
Always scan physical artwork at the highest practical resolution. Storage is cheap compared to the hassle of re-scanning valuable pieces years later when you need better quality. Keep master files in lossless TIFF format, then generate smaller JPEG versions for everyday browsing and sharing.
Choosing the Right Format for Different Artwork Types
Your artwork type determines which format makes sense. Here's how to decide:
Physical paintings and prints: Always raster (TIFF, JPEG, PNG). You need photographic accuracy to document brush strokes, color gradation, surface texture, and condition details. Vector formats can't capture this complexity. For detailed guidance on photographing traditional artwork, see our digital organization guide.
Digital illustrations and logo designs: Vector (SVG, AI, EPS) if created digitally in programs like Illustrator or CorelDRAW. These files scale infinitely, making them perfect for reproduction at any size. Save a high-resolution raster export alongside the vector master for quick previews.
Mixed media and collage work: Raster formats work best because you're documenting physical materials. Even if the original design started as vectors, once it exists as a physical object with texture and depth, photography captures it more accurately than mathematical shapes.
Architectural drawings and technical diagrams: Vector if originally created digitally, raster if scanning hand-drawn originals. Historical architectural sketches should be scanned as raster files to preserve the artist's line quality and paper texture.
File Formats Explained for Collection Management
Each format serves specific purposes in documentation workflows. Understanding the differences helps you avoid storage bloat without sacrificing quality.
Raster Formats
TIFF (Tagged Image File Format): The gold standard for archival documentation. TIFFs support lossless compression, meaning you can shrink file sizes moderately without destroying any image data. Use this for master files that need to last decades. The Smithsonian Institution relies on TIFF for their digital preservation initiatives.
JPEG (Joint Photographic Experts Group): Uses lossy compression to create dramatically smaller files by discarding subtle color information humans barely notice. Perfect for web galleries, email attachments, and quick reference copies. Never edit and re-save JPEGs repeatedly—each save degrades quality further. Always keep a TIFF master.
PNG (Portable Network Graphics): Lossless compression with transparency support. Useful for digital graphics that need clean edges and no background, like scanned signatures or watermarks overlaid on other images. Larger than JPEG but smaller than TIFF.
Vector Formats
SVG (Scalable Vector Graphics): Web-friendly, text-based format supported by all modern browsers. Great for displaying logos, icons, and diagrams in your online catalog. You can even edit SVG files in a text editor because they're written in XML code.
AI (Adobe Illustrator): Native Illustrator format with full editing capabilities. Preserve layer structure, text editability, and effects. Keep these as master files if your collection includes digital design work.
EPS (Encapsulated PostScript): Legacy format still widely supported across professional printing workflows. Useful when sharing vector files with print shops or older software systems.
PDF (Portable Document Format): Can contain both vector and raster data. Excellent for multi-page documents, exhibition catalogs, or provenance files that combine text, photographs, and diagrams. PDFs maintain formatting across different computers and operating systems.
Setting Up Your Digital Workflow
A good documentation system uses both vector and raster files strategically. Here's a practical workflow that balances quality, storage, and accessibility:
Step 1: Capture at maximum quality. Photograph paintings and physical artwork at the highest resolution your camera allows. Shoot in RAW format if possible for maximum editing flexibility later. If you're documenting digital vector artwork, save the original editable files plus a high-res raster export.
Step 2: Create archival masters. Convert RAW photos to TIFF files at 600 DPI. Store these on external drives with redundant backups. These masters never get edited directly—they're your insurance policy.
Step 3: Generate working copies. Export 300 DPI JPEGs from your TIFF masters for everyday use in your collection management software. These files load faster, take less space, and work smoothly in web-based platforms.
Step 4: Create web thumbnails. Resize working copies to 1200 pixels on the longest edge at 72 DPI for online galleries and social media sharing. These tiny files load instantly while still showing adequate detail on screens.
Step 5: Organize with clear naming. Use consistent file naming that includes artist name, title, and format indicator. For example: Monet_WaterLilies_Master.tif, Monet_WaterLilies_Working.jpg, Monet_WaterLilies_Web.jpg. This system prevents confusion when you're working with multiple versions of the same image.
Storage Strategies That Scale
High-resolution raster files eat storage space voraciously. A medium-sized collection of 200 paintings documented at archival quality can easily consume 200 GB of drive space. Plan your storage infrastructure before you start scanning:
Local primary storage: Keep working copies on your computer's SSD for fast access. External SSDs work well for frequently accessed material, but they cost more per gigabyte than traditional hard drives.
Network attached storage (NAS): Ideal for institutional collections or serious collectors managing thousands of files. A NAS device sits on your network and provides centralized storage accessible from any computer in your building.
Cloud backup: Essential for disaster recovery. Services like Backblaze, Google Drive, or Dropbox provide offsite redundancy. If fire, flooding, or theft destroys your local copies, your documentation survives in the cloud. For more on backup strategies, check our guide on avoiding common cataloging mistakes.
Offline archival drives: Store your TIFF masters on two external hard drives kept in different physical locations. Update these annually. Drives that spend most of their time powered off and disconnected last longer than constantly spinning drives.
Common Mistakes That Cost You Later
Years of helping collectors digitize their documentation has revealed patterns of errors that create major headaches down the line:
Deleting master files to save space. Storage costs pennies per gigabyte today. The time and expense of re-scanning artwork—or the impossibility of re-capturing sold or destroyed pieces—makes keeping masters a no-brainer. Never delete your highest-quality originals.
Using JPEG for everything. JPEG compression artifacts accumulate with each edit and save. Work on TIFF copies when you need to crop, color-correct, or adjust images, then export final JPEGs only when finished.
Scanning at low resolution "just for records." You can always make small files from large originals, but you cannot add detail that was never captured. Scan once at archival quality rather than settling for "good enough" and regretting it later.
Forgetting about file formats when changing software. Proprietary formats from specific programs sometimes become unreadable when software companies fold or stop supporting old versions. Keep copies in universal formats like TIFF, JPEG, PNG, or PDF alongside any proprietary files.
Ignoring color management. Colors look different on various monitors and printers. Use color calibration tools and embed ICC color profiles in your master files to ensure accurate reproduction. This matters enormously for insurance documentation and print reproduction.
Long-Term Digital Preservation
Digital files don't last forever without active maintenance. Hard drives fail, file formats become obsolete, and storage media degrades over time. Build these habits into your documentation routine:
Verify backups quarterly. Automated backups fail silently more often than you'd think. Every three months, spot-check random files from your backup to confirm they open correctly and haven't corrupted.
Migrate to new formats when necessary. Keep an eye on industry standards. If a format you've used becomes obsolete, plan a migration project before the old format becomes completely unsupported.
Refresh storage media every five years. Hard drives degrade whether or not you use them. Replace backup drives on a regular schedule and transfer all data to fresh media before failure rates climb.
Document your documentation. Keep notes explaining your file naming conventions, folder structure, backup schedule, and software versions used. Future you—or your heirs managing your estate—will need this roadmap to make sense of your digital archive.
Following these guidelines transforms your digital documentation from a chaotic pile of random files into a reliable, professional-grade archive that protects your collection for decades to come.