Epic - Speedmap site performance improvements

[edasmalchi]

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Epic Information - Speedmap site performance improvements

Summary

• Speedmap site is a little unwieldy with large page loads of static GeoJSON
• LA Metro page currently not working at all -- may ask to fix this temporarily pending improvements

Research required:

• what slows down the site in browsers? how much is speed of downloading page vs. speed of rendering map?
• what tools are most appropriate here?

Notes, misc:

Pydeck? Deckgl? GeoParquet on the Web / Kyle Barron | Observable (observablehq.com)? PathLayer — pydeck 0.6.1 documentation

Reviewers [Stakeholders]

1. @KatrinaMKaiser

Issues

• [ ] 1. #
• [ ] 2. #

Deliverables

• Notebooks, dashboards, narratives, presentation details.

[edasmalchi]

Request to better show SHS on site -- will explore if can be a quick improvement or concurrent with more performant mapping...

[edasmalchi]

737 temporarily removes midday speedmap for LA Metro, page once again loads

[edasmalchi]

Working on example of serving speedmap as a geoparquet to browser, based on https://observablehq.com/@kylebarron/geoparquet-on-the-web

geoparquets are about 15% the size of geojson!

[edasmalchi]

Revised approach focusing on .geojson.gz artifacts for each map, with a very minimal SPA to be embedded as iframes into each parameterized nb, see comments on https://github.com/cal-itp/data-infra/pull/2557

[edasmalchi]

also a good time to switch our variance measure to 20%ile-80%ile speed difference