Source guide

A practical guide for choosing clear public material.

Good source pages are easy to verify, easy to credit, and easy to describe in one clean note.

1

Start with the rights line

Choose material with a clear reuse statement first. If the source page is vague, move on to a better documented record.

2

Keep the source page close

Every local file should have a source URL, a credit line, and enough title information to be found again without guesswork.

3

Write from the object outward

Describe what the viewer can see first: shape, scale, line, label, or color. Then add the source link and stop.

Expanded rules

A fuller checklist for adding new objects and notes.

Source rule

Rights first

When the reuse terms are unclear, skip the item. The archive grows best through well-documented material, not through uncertainty.

Open source page
Source rule

Local copy, visible source

Keep the local file name near the source URL so the reader can connect the image and the credit without searching through the page.

Open source page
Source rule

No location clues

Map and city images should be discussed as documents. Let the labels, borders, and scale do the reading work.

Open map room
Source rule

No account references

Avoid links to handles, profiles, inboxes, or any other detail that shifts the note away from the object itself.

Open about page
Source rule

Short is safer

Compact notes are easier to trust than long captions that try to do everything at once. Keep the tone direct and specific.

Open image notes
Source rule

Use repeated structure

Titles, credits, dates, and one short note create a stable reading pattern that still leaves room for variation between objects.

Open reading shelf
Source rule

Use source dates well

Dates should describe the public record or the archive update. They should help the reader place the object, not tell a life story.

Open logbook
Source rule

Keep titles exact

Use the title from the source page and avoid renaming the object just to make the note sound smoother.

Open source page
Source rule

Favor clear credits

A credit line should be readable at a glance. If the credit is too vague, the object should stay in the ledger until it is clearer.

Open source page
Source rule

Choose varied page roles

Use cards, tables, and essays for different jobs. Variation helps the archive feel edited rather than copied from one repeated pattern.

Open long note
Source rule

Check links before publish

A quick link check catches broken source pages and makes the archive easier to trust over time.

Open source page
Field cases

Ten examples that show how the rules look in practice.

NASA - 1969-07-20

Moon Surface

Historical lunar material works well when the note stays close to surface texture, horizon line, and credit trail.

Follow example
Library of Congress - public domain set

Library Room

A room image can support the reading shelf when the note points to layout, shelving, and the feel of the space.

Follow example
Library of Congress - public domain set

City Map

A map record can stay focused on labels, blocks, scale bars, and edge details without needing extra framing.

Follow example
Library of Congress - public domain set

Books and Maps

This set bridges the shelf and the map room because it naturally links reading, route logic, and catalog pages.

Follow example
Library of Congress - public domain set

WPA Poster

Poster material gives the archive a public-message lane and keeps the shelf from leaning only on maps and skies.

Follow example
Library of Congress - public domain set

Lighthouse

The silhouette reads clearly and gives the site a navigation image that still feels like a document.

Follow example
NASA/GSFC - 2017-12-08

Dwarf Galaxy

A small galaxy field is useful when the page needs scale and density without a dramatic caption.

Follow example
NASA/JPL-Caltech - 2018-03-19

Saturn Edge

Ring geometry and dark space give this image a useful horizontal frame for the archive.

Follow example
NASA/JPL - 2017-01-13

Jupiter Crescent

Weather bands and a crisp edge line make this a good compact sky note with a clear source trail.

Follow example
NASA/JPL - 1999-12-02

Orion Bow Shock

A nebula frame gives the archive a textured sky record that still reads well as a document.

Follow example
Common slips

Patterns to avoid when writing source notes.

These notes keep the archive from drifting into vague or overworked language.

Common slip

Turning an image into a diary line

Start with the object, not with a personal story. The source page and the image itself already carry enough meaning.

A clean note is easier to trust than a note that tries to sound intimate.

Read more
Common slip

Repeating one card everywhere

Different pages should do different jobs. If the same text keeps coming back, the site starts to feel flat.

Use the long note for argument, the shelf for grouping, and the guide for rules.

Read more
Common slip

Overexplaining every object

Not every image needs a long caption. Some records work best when the title, credit, and one detail are enough.

Save the longer writing for the images that truly need it.

Read more
Common slip

Using weak source pages

If the source page is hard to read or hard to trust, the item should stay out. Strong provenance matters more than volume.

The archive is better with fewer, clearer records.

Read more
Common slip

Making the site too symmetrical

Perfect repetition can make a page feel mechanical. Vary the format when the page role changes.

Tables, cards, and essays each carry a different kind of weight.

Read more
Common slip

Adding contact surfaces for no reason

Mail forms, signup boxes, and inbox language can distract from the archive and suggest that the page wants more than reading.

Keep the site focused on records and source notes.

Read more
Audit worksheet

A quick check for each object before it lands on the page.

The worksheet keeps the archive legible without turning it into a checklist for its own sake.

Object Page Writing cue Source check
Carina Nebula Long note Lead with dust lanes, bright clusters, and wide-frame depth. Keep the catalog link next to the credit line.
Earth at Night Map room Use city lights as a pattern note and keep the caption short. Leave the source page visible on the same row.
Deep Field Long note Let the density of the sky carry the weight of the example. Match the file name with the source record.
Mars Tracks Field guide Describe the visible path, shadow, and surface texture. Use the object title exactly as the source gives it.
Mars Ridge Source ledger Keep the note factual and close to the terrain. Check the credit before moving the image elsewhere.
Blue Marble Reading shelf Use the familiar globe view as a broad anchor. Keep the source URL near the local file name.
Library Room Reading shelf Focus on shelves, space, and room layout. Make sure the collection page is easy to find.
City Map Map room Write about labels, insets, and route logic. Keep the source page tied to the image.
WPA Poster Long note Describe the public-message design and bold type. Use the exact collection credit on the page.
Lighthouse Source guide Use silhouette, setting, and navigation as the main cues. Check that the link still resolves cleanly.
Saturn Edge Reading shelf Keep the note on ring geometry and broad darkness. Pair the local file with its catalog page.
Jupiter Crescent Source ledger Use the weather bands and curved edge as the reading cue. Check that the credit line matches the source page.
Orion Bow Shock Long note Keep the text close to the nebula structure and scale. Keep the source page with the local file entry.
Eagle Pillars Source ledger Let the image note focus on dense star formation. Make the catalog trail easy to audit.
Antarctica Reading shelf Use land shape and contrast as the main cue. Link the file, the date, and the credit together.
Apollo Lunar Module Long note Use the object as a hardware record, not as decoration. Keep the catalog source easy to reach.
Spirit Panorama Map room Use the wide frame as a terrain survey note. Check the source page before placing the image.
Polar Dust Streaks Field guide Point to dust motion, streaks, and surface line work. Keep the local file name stable.
Venus Clouds Reading shelf Use cloud bands and a broad planetary field. Attach the source page to the object title.
Mercury Scarps Source ledger Keep the cue on ridges, edges, and shadow. Verify the credit before any edit.
Final rule

A source page is strongest when it leaves room for the object to speak.

That means keeping the note short enough to stay legible, but specific enough to be useful. It means choosing public material that already has a clean trail. It means keeping the local file name, the source page, and the credit line in the same field of view. Most of all, it means letting each object keep its own shape.

The archive grows naturally when the rules stay simple and the material stays clear.