maps-geo
OldMapsOnline
A portal for discovering georeferenced historical maps held by institutions around the world, pointing you to the collection that holds each map. It offers a geographic (bounding-box) search API and IIIF endpoints, but we surface it as a link to its own search form. Currently flagged as degraded: the site may present a CAPTCHA before letting you in.
Sin comprobación programática; abre la propia búsqueda del archivo.
Por qué es útil y cómo funciona
OldMapsOnline is built for place-based historical map discovery: instead of searching by keyword, you draw or describe a geographic area and it surfaces maps of that location held by institutions worldwide, often spanning centuries of cartographic history for a single place. Each result links to the holding library or archive where you can view or download the map. Echo links you to its search interface, though the site may sometimes require a verification step before it loads.
Qué contiene
Over 500,000 high-resolution historical maps indexed from institutions around the world, including major national libraries and university map collections, covering locations globally from the early modern period onward.
Acceso por API
geo-search API by bbox; IIIF
Acceso
May require solving a captcha before it responds.