Overlapping maps in a single manifest

[sammeltassen]

Discussed in https://github.com/theberlage/project-nl/discussions/4

^{Originally posted by chaomin0819 October 4, 2022}

Georeference to Placemark/Allmap - overlapping maps in the same manifest

current situation
Certain areas have two maps from different period of time in the same edition (e.g. Rotterdam in Frist Revision).
It is impossible to georeference two maps in the same manifest without them overlapping.

proposed solution
extra manifest links for these maps, so they can be georeferenced and put in Placemark/Allmaps seperately.

[sammeltassen]

Example manifest with multiple sheets of the same area:

• Eerste herziening, Serie 2

Solution 1: Use editor to export individual annotations

If we open the manifest in the Allmaps Editor it's easy to export annotations of individual maps:

• Click an image
• Open the annotation panel (bottom right)
• Click 'Open in new tab'

Here're the two annotations of the sheet of Rotterdam:

• 18. Rotterdam (1880)
• 18. Rotterdam (Tweede uitgave, 1904)

You can then generate the XYZ urls by placing the annotation url at the end of the template from the Readme:

• https://allmaps.xyz/{z}/{x}/{y}.png?url=https://annotations.allmaps.org/images/9b24e0f551f2711e

These can be imported in Placemark.

Solution 2: Make a new manifest

Another possibility is to create one or more new IIIF manifests containing a selection of images.

This can be done by opening the manifest in Visual Studio Code, removing canvasses and committing it to Github. Each canvas has a label, which should make it easy to find the right images.

Once this new manifest is loaded in the editor, it's possible to create an AnnotationPage for the entire manifest by using the url template:

• https://annotations.allmaps.org/?url=[paste the raw Github link to your manifest here]

NB: You don't have to georeference the images again, Allmaps will recognize them. It's necessary however to load the manifest in the Editor once to create the link between this new manifest and the existing georef annotations.

NB2: You need to adapt the @id of the new manifest to match the raw GitHub url. Keeping the old ID will confuse the Allmaps API.

I can help you edit the manifest and show you how you can use other (visual) tools for this as well.