yesterdays-panoramax

A Django app that publishes a Yesterdays historical image archive to the Panoramax federation, by serving a Panoramax-compatible STAC API.

Drop it into an existing installation: one dependency, one line in INSTALLED_APPS, one URL include, one migration. It adds no column to the images tables and changes no existing behaviour.

pip install yesterdays-panoramax

What it does

Panoramax is not a push protocol. A central meta-catalogue (api.panoramax.xyz) runs a harvester that crawls each registered instance's STAC API on a schedule and copies the metadata into a shared, searchable database. The pictures never move — they stay on the instance that hosts them.

This package makes a Yesterdays instance one of those crawlable instances. Your georeferenced historical photographs become discoverable alongside the rest of the federation, and every item links back to its record on your site.

It maps:

Quick start

# settings.py
INSTALLED_APPS = [
    ...,
    "yesterdays_panoramax",
]

PANORAMAX_ENABLED = True

# images.License names -> SPDX identifiers.
PANORAMAX_LICENSE_ALLOWLIST = {
    "No known copyright restrictions": "CC0-1.0",
    "CC BY-SA 4.0": "CC-BY-SA-4.0",
}

PANORAMAX_INSTANCE_NAME = "Yesterdays"
PANORAMAX_CONTACT_EMAIL = "you@example.org"

# Set once. Never change it. See docs/configuration.md.
PANORAMAX_UUID_NAMESPACE = "6f3d6b1a-6b0e-5a3f-9c8d-0f1c2a4b8e7d"

# urls.py -- the /api/ prefix is not optional, see below
urlpatterns = [
    ...,
    path("api/", include("yesterdays_panoramax.urls", namespace="panoramax")),
]

manage.py migrate panoramax
manage.py panoramax_backfill

Publication is opt-in twice over: PANORAMAX_ENABLED, and a licence allowlist that starts empty. An instance with the flag on and no allowlist publishes nothing. That is deliberate — Panoramax's federation policy expects open licensing, and only a human can say which of an archive's licences qualify.

Ruling on individual photographs

Licences and visibility flags cannot express a judgement about one particular picture — a portrait whose subject asked not to have it republished, a scan whose provenance turned out to be murky. So decisions can also be made per image:

from yesterdays_panoramax import api

api.exclude_image(image, reason="Depicted person objected", by=request.user)

Or, for archives whose rights are settled picture by picture rather than licence by licence, invert the default so nothing is published until it is approved:

PANORAMAX_IMAGE_POLICY = "opt-in"

An exclusion is absolute; an approval is not an override — an approved image still has to satisfy the licence, visibility, date and georeference rules. The feature is inert until used. See per-image control.

Joining the federation

Serving the API is only half of it. To actually be harvested, open an issue on panoramax/server/meta-catalog asking to be added; an administrator runs stac-harvester add-instance <name> --url https://your.instance. There is no self-service endpoint.

Before you do, two questions the code cannot answer for you:

• Licensing. The federation expects Licence Ouverte 2.0 or CC-BY-SA 4.0, and /api/configuration advertises one instance-wide licence.
• Fit. Panoramax catalogues contemporary field photography for OpenStreetMap mapping. Historical photographs with crowd-estimated positions are a different kind of data. There is precedent — the OSM-FR instance carries items back to 1904 — but it is worth raising with the Panoramax community before publishing at scale.

Documentation

Requirements

• Python 3.11+
• Django 4.2+
• PostgreSQL with PostGIS (the adapter aggregates extents, filters spatially, and builds vector tiles with ST_AsMVT)
• A Yesterdays installation providing the images app — see host contract

Development

pip install -e ".[test]"
./manage.py test tests

The suite runs against a stubbed host app in tests/images/, so you do not need a full Yesterdays deployment. It needs a PostGIS database; connection details come from the usual PG* environment variables.

Licence

AGPL-3.0-or-later, matching Yesterdays. See LICENSE.