31:T44e,md` - https://iiif.io/event/2021/annual_conference/ > Hundreds of thousands of digitised maps are currently accessible through IIIF across institutions worldwide. Traditionally, enriching this material geospatially required complex GIS server infrastructure and creating non-IIIF derivatives (like map tiles). The IIIF Maps Technical Specification Group is working on an extension to annotate IIIF resources with geospatial metadata. Allmaps uses this extension to create new possibilities for georeferencing, warping and exploring IIIF maps. For example, Allmaps eliminates the need for a map tile server by warping the IIIF resources in the browser using WebGL. > In the presentation of the newly developed tools we will demonstrate (1) the process of georeferencing maps from several IIIF map repositories, (2) the resulting generated geospatial metadata, (3) viewing the warped individual maps and map collections, (4) export possibilities. > Allmaps is an open source project initiated by Bert Spaan in collaboration with Delft University of Technology Library and Leiden University Libraries.`32:T823,annotation = { // return fetch(annotationUrl).then((response) => response.json()) return { "type": "Annotation", "@context": [ "http://geojson.org/geojson-ld/geojson-context.jsonld", "http://iiif.io/api/presentation/3/context.json" ], "motivation": "georeferencing", "target": { "type": "Image", "source": "https://cdm21033.contentdm.oclc.org/iiif/2/krt:2891/full/full/0/default.jpg", "service": [ { "@id": "https://cdm21033.contentdm.oclc.org/iiif/2/krt:2891", "type": "ImageService2" } ], "selector": { "type": "SvgSelector", "value": "" } }, "body": { "type": "FeatureCollection", "purpose": "gcp-georeferencing", "transformation": { "type": "polynomial", "order": 0 }, "features": [ { "type": "Feature", "id": "FCPkr8bYjfP7Xf92", "properties": { "pixelCoords": [ 5202, 660 ] }, "geometry": { "type": "Point", "coordinates": [ 4.4908801, 51.9119637 ] } }, { "type": "Feature", "id": "NMTQyU1wqpq2z7GT", "properties": { "pixelCoords": [ 4098, 1683 ] }, "geometry": { "type": "Point", "coordinates": [ 4.4662943, 51.8928349 ] } }, { "type": "Feature", "id": "VqAGDAkp9vmgS2g5", "properties": { "pixelCoords": [ 2045, 390 ] }, "geometry": { "type": "Point", "coordinates": [ 4.4070052, 51.9089778 ] } } ] } } 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2f:{"title":"Allmaps: IIIF Annual Conference 2021","cells":[{"id":0,"value":"md`# Allmaps: IIIF Annual Conference 2021`","pinned":false,"hidden":false,"mode":"ojs"},{"id":27,"value":"$31","pinned":false,"hidden":false,"mode":"ojs"},{"id":688,"value":"htl.html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":43,"value":"slide(html`\n

\n \n Allmaps

Open-source tools for enriching and exploring IIIF maps

\n`, { \n fontSize: '200%',\n backgroundColor: 'rgb(15, 25, 82)',\n backgroundRepeat: 'no-repeat',\n backgroundSize: 'cover',\n backgroundPosition: 'center',\n \n backgroundImage: `url(\"data:image/svg+xml;utf8,${encodeURIComponent(await FileAttachment(\"mask@4.svg\").text())}\")`\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":644,"value":"slide(md`\n- __Bert Spaan - independent designer of technology for data and maps__\n - Co-chair of IIIF Maps Technical Specification Group\n - @bertspaan, bertspaan.nl\n- __Jules Schoonman - Delft University of Technology Library__\n - Digital curator of special collections\n - [heritage.tudelft.nl](https://heritage.tudelft.nl)\n\nSlides: observablehq.com/@bertspaan/allmaps-iiif-annual-conference-2021\n`, { \n backgroundRepeat: 'no-repeat',\n backgroundSize: '170%',\n backgroundPosition: 'center',\n backgroundImage: `url(\"data:image/svg+xml;utf8,${encodeURIComponent(await FileAttachment(\"mask@4.svg\").text())}\")`\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":310,"value":"slide(await FileAttachment('mesdag-exhibition.jpg').image())","pinned":false,"hidden":false,"mode":"ojs"},{"id":583,"value":"slide(md`\n- So we wondered if we could…\n - Provide a better overview of available digital maps\n - Develop easily reusable tools for exploring and displaying dispersed collections\n - Bring our enrichments back to the owning institutions \n\nAnd we realised that IIIF could help us to do all these things!\n`)","pinned":false,"hidden":false,"mode":"ojs"},{"id":206,"value":"slide(htl.html`\n\n

\n ${await showCollections(false)}\n

\n`)","pinned":false,"hidden":false,"mode":"ojs"},{"id":414,"value":"slide(htl.html`\n

${await FileAttachment(\"rotterdam-harvard.jpg\").image()}

${await FileAttachment(\"rotterdam-princeton.jpg\").image()}

${await FileAttachment(\"rotterdam-vu@1.jpg\").image()}

`)","pinned":false,"hidden":false,"mode":"ojs"},{"id":757,"value":"slide(await FileAttachment('maps-nls.jpg').image())","pinned":true,"hidden":false,"mode":"ojs"},{"id":131,"value":"// slide(html`\n// \n// `)","pinned":false,"hidden":false,"mode":"ojs"},{"id":304,"value":"slide(await FileAttachment('map-warper-screenshot.jpg').image())","pinned":false,"hidden":false,"mode":"ojs"},{"id":433,"value":"slide(htl.html`\n\n ${await FileAttachment('maps-by-decade.gif').image()}\n`)","pinned":false,"hidden":false,"mode":"ojs"},{"id":298,"value":"slide(md`\n - Map Warper required __three__ copies of each scanned map:\n 1. Original image in digital image repository\n 2. Copy of this image on Map Warper's server\n 3. After the map had been georeferenced: a warped GeoTIFF\n\n\n - However, the process of georeferencing itself does not generate much data:\n 1. Reference points on scanned map\n 2. Corresponding reference points on world map\n 3. Optional mask, to remove non-cartographic parts of image\n\n\n - Modern browers can transform the original map on the fly, using the IIIF Image API\n - __No need to create geospatial derivatives or run complex GIS infrastructure!__\n`)","pinned":false,"hidden":false,"mode":"ojs"},{"id":268,"value":"slide(htl.html`\n\n

\n ${tileOverlapIiif}\n ${tileOverlapMap}\n

\n`, {}, 'tile-overlap-container')","pinned":false,"hidden":false,"mode":"ojs"},{"id":559,"value":"slide(md`\nThe IIIF Maps Technical Specification Group is working on an __IIIF extension for georeferencing and geotagging IIIF images__.\n`)","pinned":false,"hidden":false,"mode":"ojs"},{"id":153,"value":"slide(md`\n\\`\\`\\`json\n${JSON.stringify(annotation, null, 2)}\n\\`\\`\\`\n`)","pinned":false,"hidden":false,"mode":"ojs"},{"id":169,"value":"slide(html`