工具页 Tool 游戏/互动 Game / interactive
GeoJSON Viewer：粘贴校验并画地图 GeoJSON Viewer: paste, validate, and draw on a map
粘贴 GeoJSON，校验过再画上地图，全程不上传。 Paste GeoJSON, validate it, and draw the map without uploading.
详细介绍Details
Show HN https://9revolution9.com/tools/geo/geojson-viewer — 浏览器内粘贴 GeoJSON，按 RFC 7946 做语法+语义校验（闭合环、右手定则、经纬范围、声明 bbox 是否包住数据），错误不画图、警告仍可画；解析/校验/渲染均本地，不上传。 errors clear the map, warnings still draw; parse/validate/render stay local with no upload.
适合学什么What to learn
- 工具页 Tool
在浏览器里生成 CSS/HTML 的小工具。 In-browser tools that generate CSS or HTML.
- 游戏/互动 Game / interactive
可直接玩或操作的教学游戏与 WebGL 演示。 Teaching games and WebGL demos you can play in the browser.
为什么推荐Why we recommend it 公开页 200（2026-09-21）。HN 条目页在部分网络下可能 403，仍列公开 item URL 作次要来源。 Public page 200 (2026-09-21). The HN item page may return 403 on some networks; the public item URL is still listed as a secondary source.
核验记录：来源、抓取与截图说明Verification log: sources, checks, and captures
Show HN 当日条目（item 49784845）：浏览器内粘贴 GeoJSON，按 RFC 7946 做语法+语义校验；解析/校验/渲染均本地、不上传，是本库 HTML 分区可用的免费 GIS/开发工具。预览为 Playwright 实拍首屏裁 3:2 WebP。 （item 49784845，2026-09-21） 公开页已核实 HTTP 200；Same-day Show HN (item 49784845): paste GeoJSON in-browser and validate against RFC 7946; parse/validate/render stay local with no upload — a useful free GIS/dev tool for the HTML board. Preview is a Playwright capture of the above-the-fold view cropped to 3:2 WebP. Show HN item 49784845 (2026-09-21) at https://9revolution9.com/tools/geo/geojson-viewer — paste GeoJSON in-browser and validate against RFC 7946 (closed rings, right-hand rule, lon/lat ranges, declared bbox containment); public page verified HTTP 200;
