randy
5caf865fc8
public/sw.js: network-falling-back-to-cache for RainViewer radar tile requests specifically (nothing else — the app itself is served by the same local server that's already the offline resource in the van, so there's no app-shell to precache). Registered from layout.erb, a no-op where it can't register (insecure context) rather than an error. Verified: registers and controls the page, tiles get cached on a normal fetch, cache.match() correctly retrieves them by the same request. CDP's network-blocking simulation doesn't interact cleanly with Service Worker fetch interception (a known tooling quirk, not specific to this), so the actual offline fallback path is the standard try/catch pattern, verified by code review rather than a simulated-offline screenshot.
MapTool
Table of Contents
A mapping application written in Ruby with Sinatra.
The project’s shape is still open — this is the initial scaffold.
Status
Early scaffold. The web application serves a vector map (MapLibre GL JS), with an online style and an optional offline style backed by a local PMTiles file, an animated RainViewer radar overlay, GPX upload/display (points and tracks, organized in folders), and a live position marker from a local GNSS receiver via gpsd.
Requirements
-
Ruby (see
.ruby-version) and Bundler
Getting started
bundle install
bundle exec puma -C config/puma.rbThen open http://127.0.0.1:4567 in a browser.