{
  "schema": "tesign-radar/item/1",
  "generated_at": "2026-09-19T23:10:56.893Z",
  "lang": "en",
  "slug": "alidade",
  "url": "https://tesign.com/en/item/alidade/",
  "alternates": {
    "ko": {
      "html": "https://tesign.com/item/alidade/",
      "json": "https://tesign.com/item/alidade/index.json",
      "markdown": "https://tesign.com/item/alidade/index.md"
    },
    "en": {
      "html": "https://tesign.com/en/item/alidade/",
      "json": "https://tesign.com/en/item/alidade/index.json",
      "markdown": "https://tesign.com/en/item/alidade/index.md"
    }
  },
  "name": "Alidade",
  "use_label": "Build and style maps in the browser",
  "one_liner": "An open Web-GIS: drop in spatial data, style it, and fly over 3D terrain in the browser.",
  "text": {
    "why": "Most mapping stacks start with an API key, and a map dies when someone’s free tier changes. Alidade is built so nothing needs one — described by its author as a constraint rather than a boast.",
    "take": "Filters are structures rather than strings, so the condition you built on screen is also shown as SQL — a way to check the map when you doubt it.",
    "build": [
      "A map is a single JSON document: editing the document changes the map, swapping the basemap does not destroy your layers, and undo goes sixty documents deep. Drop a GeoJSON, zipped Shapefile, GeoPackage, KML or GPX and it is reprojected into PostGIS and served back as vector tiles in the same request; links and WMS endpoints work too. Imagery becomes Cloud-Optimised GeoTIFFs, mosaicked on demand by rules such as newest or sharpest. Basemaps come from OpenFreeMap, terrain from SRTM."
    ],
    "who": [
      {
        "role": "People working with spatial data who do not need a full commercial GIS, and teams turning survey or field data into maps.",
        "situation": null
      }
    ],
    "start": [
      {
        "command": false,
        "text": "Open the live demo at alidade.aysanz.dev and drag in a single GeoJSON file."
      }
    ],
    "caveat": [
      "Self-hosting needs PostGIS and GDAL in place. With a dozen stars it is an early project, with the risk that carries when one person maintains it."
    ]
  },
  "cta": {
    "type": "try",
    "label": "TRY",
    "url": "https://alidade.aysanz.dev/"
  },
  "ready": "browser",
  "categories": [
    "data"
  ],
  "categories_confirmed": true,
  "tags": [
    "지도",
    "gis",
    "위성사진",
    "오픈소스"
  ],
  "platform": [
    "web"
  ],
  "license": {
    "spdx": "Apache-2.0",
    "scope": "permissive",
    "scope_text": "Commercial use, redistribution OK. Keep notices; mark changes.",
    "url": "https://spdx.org/licenses/Apache-2.0.html",
    "note": null,
    "open_source": true
  },
  "language": "TypeScript",
  "source_urls": {
    "canonical": "https://alidade.aysanz.dev/",
    "github": "https://github.com/aysanz/alidade",
    "huggingface": null,
    "app_store": null,
    "sightings": [
      {
        "source": "showhn",
        "url": "https://github.com/AysanZ/alidade",
        "posted_at": "2026-09-17T06:52:20.000Z",
        "hn_url": "https://news.ycombinator.com/item?id=49737256"
      }
    ]
  },
  "numbers": {
    "as_of": "2026-09-19T18:00:00.000Z",
    "stars": 13,
    "stars_unit": "GitHub stars",
    "stars_checked_at": "2026-09-19T22:57:50.917Z",
    "stars_observed_since_check": 0,
    "star_delta_24h": null,
    "star_delta_7d": null,
    "star_delta_30d": null,
    "star_delta_unit": "GitHub stars gained in the window, GH Archive events summed to as_of",
    "spark_14d": [
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      null
    ],
    "hf_likes": null,
    "hf_likes_observed_at": null,
    "hn_points": 2,
    "hn_points_observed_at": "2026-09-19T01:13:00.338Z",
    "store": null,
    "method": "Star total = the value last checked on GitHub (stars_checked_at) + increases observed via GH Archive since. The 24h · 7d · 30d gains are GH Archive hourly events summed to the reference time (as_of). No score of ours."
  },
  "ranks": null,
  "activity": {
    "pushed_at": "2026-09-17T09:12:03.000Z",
    "owner_type": "User",
    "open_issues": 0,
    "contributors": 1,
    "releases_count": 1,
    "latest_release": {
      "tag": "v0.1.0",
      "published_at": "2026-09-09T13:07:24.000Z",
      "prerelease": false
    },
    "checked_at": "2026-09-19T22:57:50.917Z",
    "core_checked_at": "2026-09-19T22:57:50.917Z"
  },
  "signals": [
    {
      "kind": "new",
      "label": "NEW",
      "value": "1h OLD WHEN SEEN"
    }
  ],
  "images": {
    "og": "https://tesign.com/img/alidade-f3670de6ce.jpg",
    "cover": "https://tesign.com/img/alidade-f3670de6ce.jpg",
    "cover_width": 1600,
    "cover_height": 799,
    "gallery": [
      "https://tesign.com/img/alidade-f3670de6ce.jpg",
      "https://tesign.com/img/alidade-ff0eead746.png",
      "https://tesign.com/img/alidade-9e98038297.png",
      "https://tesign.com/img/alidade-4fd83f52d9.jpg"
    ],
    "alt": "The Alidade editor: a camera and terrain panel on the left, and 3D mountainous terrain rendered under a night sky on the right.",
    "tier": 2
  },
  "dates": {
    "first_seen_at": "2026-09-17T08:48:02.602Z",
    "source_created_at": "2026-09-17T06:52:20.000Z",
    "discovery_hours": 1.9285005555555557,
    "launch_signal_at": "2026-09-17T06:52:20.000Z",
    "kept_at": "2026-09-19T22:45:27.563Z",
    "first_published_at": "2026-09-19T22:45:27.650Z",
    "updated_at": "2026-09-19T22:45:27.623Z",
    "ingestion_mode": "live"
  },
  "notes": [
    "This file was produced by the same build, from the same data, as the tesign.com item page. The text is editorial; the numbers are stored observations.",
    "null in the JSON means not observed — never zero. The Markdown writes [unconfirmed] for it.",
    "Star total = the value last checked on GitHub (stars_checked_at) + increases observed via GH Archive since. The 24h · 7d · 30d gains are GH Archive hourly events summed to the reference time (as_of). No score of ours.",
    "A summary, not legal advice."
  ]
}