30:T749,geojson = { geoJsonLayer.clearLayers(); const parser = new DOMParser(); const features = new Array(); if (includeAnnotations === "Yes") { for (const { annotationPage, mapId } of textAnnotations) { const transformer = warpedMapLayer.getWarpedMap(mapId).transformer; for (const annotation of annotationPage.items) { try { let coords; if ( annotation.target.selector && annotation.target.selector.type === "SvgSelector" ) { const svgElement = parser.parseFromString( annotation.target.selector.value, "image/svg+xml" ); const points = svgElement .getElementsByTagName("polygon")[0] .getAttribute("points"); coords = points .split(" ") .map((coord) => coord.split(",").map((i) => +i)); } else { const [x, y, w, h] = annotation.target .split("#xywh=")[1] .split(",") .map((i) => +i); coords = [ [x, y], [x + w, y], [x + w, y + h], [x, y + h] ]; } coords = selectedFeature === "Point" ? getPolygonCentroid(coords) : [coords]; const geojson = transformer.transformForwardAsGeojson(coords); const body = annotation.body.filter( (body) => body.type === "TextualBody" ); const properties = { label: body[0]?.value || "No label found" }; const feature = turf.feature(geojson, properties); features.push(feature); } catch {} } } } const featureCollection = turf.featureCollection(features); geoJsonLayer.addData(featureCollection); return featureCollection; }31:[{"id":"192f32025e85469e3fb47805c2bc84d4124055d72f9247592384ff118fd032ff69e7cd85ed3996afbec69c0e1ae7658fa105fd74a90982c4a65be99902da079a","href":"https://static.observableusercontent.com/files/192f32025e85469e3fb47805c2bc84d4124055d72f9247592384ff118fd032ff69e7cd85ed3996afbec69c0e1ae7658fa105fd74a90982c4a65be99902da079a","name":"annotations-in-allmaps-grouped.ndjson","type":"application/octet-stream","lastModified":1740633952691.997,"size":778023}] 2e:{"title":"David Rumsey Map Collection","cells":[{"id":0,"value":"# David Rumsey Map Collection\n\nGrouping the 10.126 georeferenced & reviewed maps of the David Rumsey Map Collection that have been added to the Allmaps database by publication.\n\n_Made during the [Colocate² Unconference](https://davidrumseymapcenter.github.io/colocate/) at Stanford University Libraries (February 26-28, 2025). Thanks to the Machines Reading Maps team for making available the source data._","pinned":false,"hidden":false,"mode":"md"},{"id":23,"value":"viewof filteredMaps = Inputs.search(maps)","pinned":false,"hidden":false,"mode":"ojs"},{"id":9,"value":"viewof selectedMaps = Inputs.table(filteredMaps, {\n value: filteredMaps[0],\n columns: [\"title\", \"date\", \"type\", \"count\"],\n header: {\n title: \"Title\",\n date: \"Date\",\n type: \"Type\",\n count: \"Count\"\n },\n width: {\n title: 600\n },\n multiple: false\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":39,"value":"$${selectedMaps ? `${selectedMaps.number}
${selectedMaps.title}
Open Publication at David Rumsey Map Collection`: \"_Select a map_\"}","pinned":false,"hidden":false,"mode":"md"},{"id":220,"value":"## Open in Allmaps Viewer","pinned":false,"hidden":false,"mode":"md"},{"id":79,"value":"{\n if (selectedMaps) {\n return Inputs.button(\"Copy Georeference Annotation to clipboard\", {\n value: null,\n reduce: () =>\n navigator.clipboard.writeText(JSON.stringify(annotationPage, null, 2))\n });\n } else return md``;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":88,"value":"{\n if (selectedMaps) {\n return md`_Open [Allmaps Viewer](https://viewer.allmaps.org/) and paste the Georeference Annotation in the bottom field. Use _[_ and _]_ keys to browse the collection._`;\n } else return md``;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":217,"value":"## Leaflet preview","pinned":false,"hidden":false,"mode":"md"},{"id":234,"value":"viewof includeAnnotations = Inputs.radio([\"Yes\", \"No\"], {\n label: \"Include text annotations? (experimental!)\",\n value: \"No\"\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":252,"value":"viewof selectedFeature = Inputs.radio([\"Polygon\", \"Point\"], {\n label: \"Feature type\",\n value: \"Polygon\"\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":299,"value":"viewof opacity = Inputs.range([0.05, 1], {\n label: \"Map opacity\",\n step: 0.05,\n value: 1\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":306,"value":"includeAnnotations === \"Yes\" ? downloadGeoJson(geojson) : md``","pinned":false,"hidden":false,"mode":"ojs"},{"id":198,"value":"container = yield html`

`","pinned":false,"hidden":false,"mode":"ojs"},{"id":128,"value":"## Some numbers\n\n- The [Machines Reading Maps dataset](https://doi.org/10.25740/ss311gz1992) contains 56.425 maps (excluding 204 that could not be fetched)\n- 10.151 of those maps have been reviewed\n- 34.841 maps were in the Allmaps database before ingesting (25/2/2025)\n- 199 Rumsey maps have been georeferenced with Allmaps to date (25/2/2025)\n- 120 of those maps are in the dataset too (of which 25 have been reviewed, which were excluded from the ingested dataset)\n- This notebook groups the remaining 10.126 maps by 1.676 unique publications","pinned":false,"hidden":false,"mode":"md"},{"id":165,"value":"## Rumsey Roulette\n\nTo explore all 56.425 maps (reviewed & unreviewed), you can give Rumsey Roulette a try. It's an endpoint that returns a random Georeference Annotation from a SQLite database. You can open it in Allmaps Viewer; each time you refresh the page a new map is loaded.\n\n**[Open Rumsey Roulette in Allmaps Viewer](https://viewer.allmaps.org/?url=https://sammeltassen-rumsey_roulette.web.val.run)**\n\n[View source code](https://www.val.town/v/sammeltassen/rumsey_roulette)\n","pinned":false,"hidden":false,"mode":"md"},{"id":144,"value":"## Notes, ideas & questions\n\n- The georeference data could be served by the DRMC directly and embedded or referenced in the IIIF Manifests.\n- The DRMC already offers IIIF Manifests for facets and search results! For example, [this](https://www.davidrumsey.com/luna/servlet/iiif/collection/s/9cvwns) is the manifest for the first publication in the list which can be opened in [Allmaps Editor](https://editor.allmaps.org/images?url=https://www.davidrumsey.com/luna/servlet/iiif/collection/s/9cvwns). These dynamic Manifests could be used to recreate the grouping in the Allmaps API.\n- The API does not seem to recognize the images when opening the collection above.\n- The Georeference Annotations are currently not locked to a specific version: anyone can edit them in Allmaps Editor.\n- Are V3 Manifests available?","pinned":false,"hidden":false,"mode":"md"},{"id":113,"value":"## Links\n\n- [David Rumsey Map Collection](https://www.davidrumsey.com/)\n- Dataset: [David Rumsey Map Collection: Georeferenced Maps Metadata](https://doi.org/10.25740/ss311gz1992)\n- [Scripts to convert David Rumsey Map Collection metadata to Georeference Annotations](https://github.com/allmaps/rumsey-scripts/)","pinned":false,"hidden":false,"mode":"md"},{"id":138,"value":"## How does this work?\n\nThis notebook works off an `ndjson` file (see the `Files` panel on the right) listing all maps that were ingested, grouped by the **Pub List No** and with some basic metadata (scraped from the IIIF Manifests). For each publication, it contains an array of one or more map identifiers used by Allmaps.\n\nAfter a map has been selected, the notebook fetches the available Georeference Annotations from the Allmaps API and combines them into a single Annotation Page. This can be copied and pasted in Allmaps viewer (the combined annotation is too large to open as a data url).\n\nFor more information about the Allmaps Leaflet plugin, please consult [this Notebook](https://observablehq.com/@allmaps/leaflet-plugin). ","pinned":false,"hidden":false,"mode":"md"},{"id":90,"value":"## Implementation","pinned":false,"hidden":false,"mode":"md"},{"id":34,"value":"annotations = {\n if (selectedMaps) {\n // To avoid too many fetches while searching\n await sleep(1000);\n const resp = await Promise.all(\n selectedMaps?.annotations\n .map((id) => \"https://annotations.allmaps.org/maps/\" + id)\n .map(fetchJson)\n );\n return resp.filter((i) => !i.error);\n }\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":62,"value":"annotationPage = ({\n type: \"AnnotationPage\",\n \"@context\": \"http://www.w3.org/ns/anno.jsonld\",\n items: annotations\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":45,"value":"fetchJson = (url) => fetch(url).then((resp) => resp.json())","pinned":false,"hidden":false,"mode":"ojs"},{"id":5,"value":"maps = FileAttachment(\"annotations-in-allmaps-grouped.ndjson\")\n .text()\n .then((text) =>\n text\n .split(\"\\n\")\n .filter((line) => line)\n .map((line) => JSON.parse(line))\n .map((map) => ({\n ...map,\n count: map.annotations.length\n }))\n )","pinned":false,"hidden":false,"mode":"ojs"},{"id":346,"value":"sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms))","pinned":false,"hidden":false,"mode":"ojs"},{"id":294,"value":"## Text annotations\n\n_Originally made for [this Notebook](https://observablehq.com/d/f5b83904983ce90b)_","pinned":false,"hidden":false,"mode":"md"},{"id":238,"value":"textAnnotations = {\n if (includeAnnotations === \"Yes\") {\n return Promise.all(\n annotations\n .map((i) => ({\n annotationPage:\n i.target.source.id.replace(\"iiif\", \"iiif/3\") + \"/annopage\",\n mapId: i.id\n }))\n .map((i) =>\n fetchJson(i.annotationPage).then((resp) => ({\n annotationPage: resp,\n mapId: i.mapId\n }))\n )\n );\n }\n return new Array();\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":249,"value":"$30","pinned":true,"hidden":false,"mode":"ojs"},{"id":257,"value":"turf = require(\"https://bundle.run/turf@3.0.14\")","pinned":false,"hidden":false,"mode":"ojs"},{"id":254,"value":"getPolygonCentroid = (pts) => {\n // From : https://stackoverflow.com/questions/9692448/how-can-you-find-the-centroid-of-a-concave-irregular-polygon-in-javascript\n var first = pts[0],\n last = pts[pts.length - 1];\n if (first[0] != last[0] || first[1] != last[1]) pts.push(first);\n var twicearea = 0,\n x = 0,\n y = 0,\n nPts = pts.length,\n p1,\n p2,\n f;\n for (var i = 0, j = nPts - 1; i < nPts; j = i++) {\n p1 = pts[i];\n p2 = pts[j];\n f =\n (p1[1] - first[1]) * (p2[0] - first[0]) -\n (p2[1] - first[1]) * (p1[0] - first[0]);\n twicearea += f;\n x += (p1[0] + p2[0] - 2 * first[0]) * f;\n y += (p1[1] + p2[1] - 2 * first[1]) * f;\n }\n f = twicearea * 3;\n return [Math.round(x / f + first[0]), Math.round(y / f + first[1])];\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":303,"value":"downloadGeoJson = (data, filename = \"data.geojson\") => {\n const downloadData = new Blob([JSON.stringify(data, null, 4)], {\n type: \"application/json\"\n });\n const button = DOM.download(downloadData, filename, `Download GeoJSON`);\n return button;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":194,"value":"## Leaflet","pinned":false,"hidden":false,"mode":"md"},{"id":191,"value":"L = {\n const L = await require(\"leaflet@1/dist/leaflet.js\");\n if (!L._style) {\n const href = await require.resolve(\"leaflet@1/dist/leaflet.css\");\n document.head.appendChild(\n (L._style = html``)\n );\n }\n return L;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":188,"value":"allmapsLeaflet = require(\"@allmaps/leaflet@1.0.0-beta.40\")","pinned":false,"hidden":false,"mode":"ojs"},{"id":196,"value":"map = {\n const map = L.map(container);\n\n L.tileLayer(\"https://tile.openstreetmap.org/{z}/{x}/{y}.png\", {\n attribution:\n '© OpenStreetMap contributors'\n }).addTo(map);\n\n invalidation.then(() => map.remove());\n\n return map;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":322,"value":"setOpacity = {\n warpedMapLayer.setOpacity(opacity);\n return opacity;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":204,"value":"warpedMapLayer = new allmapsLeaflet.WarpedMapLayer().addTo(map)","pinned":false,"hidden":false,"mode":"ojs"},{"id":231,"value":"geoJsonLayer = L.geoJson()\n .bindPopup(function (layer) {\n return layer.feature.properties.label;\n })\n .addTo(map)","pinned":false,"hidden":false,"mode":"ojs"},{"id":208,"value":"warpedMap = {\n warpedMapLayer.clear();\n const ids = await warpedMapLayer.addGeoreferenceAnnotation(annotationPage);\n return ids;\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":211,"value":"bounds = {\n annotationPage;\n if (annotationPage && warpedMap) {\n return map.fitBounds(warpedMapLayer.getBounds());\n } else return map.getBounds();\n}","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}