Live Engine
One tract, one record, live and sourced.
Every clicked tract resolves to one stable record with a permanent ID, official source metadata, a real multi-year history, and on-demand satellite refresh - and the report generator keeps metric values source-grounded.
What you can do now
3 live layers
Canopy · heat · impervious
3 epochs
Measured · 2016 · 2020 · 2021
6+ sources
Official open data
Source locked
Locked if a source is missing
Live proof
Run a real per-tract refresh
Check the engine status, then recompute the three physical layers for any tract. When Earth Engine is connected you get genuine zonal statistics; otherwise the frozen UCRI v1.0 snapshot is served - always clearly labelled.
Run an on-demand tract refresh
Real Earth Engine zonal stats when connected · frozen v1.0 otherwise
How it works
From a map click to a sourced report
Five deterministic steps. The satellite-refresh step activates the moment Earth Engine credentials are connected; every other step runs today.
Pick a tract
Click any Los Angeles County census tract on the map, or paste its 11-digit GEOID.
Resolve the record
Canopulse builds one stable tract record - a permanent ID, the current canopy, heat, and impervious metrics, the priority class, and the dominant drivers.
Refresh the live layers
Earth EngineWith Earth Engine connected, tree canopy, summer heat, and impervious surface are recomputed on the exact tract polygon and shown against the frozen baseline.
Compare the history
The measured 3-epoch series (2016 · 2020 · 2021) shows how the tract has moved over time, on a consistent 2020 census-tract geography.
Generate the report
A printable, sourced report is produced - every figure traceable back to its official source layer, with caveats kept in view.
Official sources
Authoritative open data, fully cited
Every layer comes from a public agency dataset. These are the exact products Canopulse reads, each linked to its official documentation.
Tree canopy
Official docsNLCD 2021 Tree Canopy Cover
Vintage 2021
30 m raster
Public domain (USGS / USFS)
Land surface temperature
Official docsLandsat 8/9 Collection 2 Level 2 ST_B10 summer mosaic
Vintage 2023
100 m native, delivered at 30 m
Public domain (USGS)
Impervious surface
Official docsNLCD 2021 Impervious Surface
Vintage 2021
30 m raster
Public domain (USGS)
Processing engine
Official docsGoogle Earth Engine
Vintage 2026
server-side geospatial computation
Platform terms apply
How we keep it honest
Built to be trusted, not just to look good
A polished report is worthless if it hides uncertainty. Canopulse keeps every figure traceable and every limit in view.
Measured, never guessed
If an official source is missing for a tract, Canopulse locks the score instead of inventing a value.
Official open data only
Canopy, heat, and impervious surface come from USGS NLCD and Landsat; social and environmental context from CDC and CalEnviroScreen; boundaries from the U.S. Census.
Live and frozen, side by side
Each on-demand Earth Engine refresh is shown next to the frozen UCRI v1.0 baseline, so you can see exactly what changed and by how much.
Clearly scoped
Every report is a defensible screening and planning memo - not a final engineering, legal, regulatory, or funding determination.
See it on a real tract.
Open the map, pick a tract, and generate a sourced report - or browse the open source registry.