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CEJST Data Workflow

Overview

The CEJST (Climate Equity and Justice Screening Tool) dataset is now downloaded as a full US coverage shapefile, then cropped to Maine for use in the webmap and analysis.

Data Flow

  1. Download Full US Dataset: The full US CEJST shapefile is downloaded to data/cejst-us.zip and extracted to data/cejst-us/
  2. Crop to Maine: The dataset is cropped to Maine using src/crop_cejst_to_state.py, creating data/cejst-maine.shp
  3. Generate PMTiles: The Maine-specific shapefile is converted to PMTiles for the webmap: docs/data/cejst.pmtiles

Usage

Download CEJST Data

# Download the full US CEJST dataset
python src/update_data_sources.py --source "CEJST (Climate Equity and Justice Screening Tool)"

Crop to Maine

# Crop the full US dataset to Maine (default)
python src/crop_cejst_to_state.py

# Or specify explicitly
python src/crop_cejst_to_state.py --state "Maine" --output data/cejst-maine.shp

Generate PMTiles for Webmap

# Convert the Maine-specific CEJST shapefile to PMTiles
python src/convert_to_pmtiles.py data/cejst-maine.shp docs/data/cejst.pmtiles -l cejst

Important Notes

  • Webmap: The webmap (docs/js/map.js) uses ./data/cejst.pmtiles, which should be generated from the Maine-specific shapefile (data/cejst-maine.shp), NOT the full US dataset.
  • Analysis: Notebooks and analysis scripts should use data/cejst-maine.shp (or the cropped version) for Maine-specific analysis.
  • Extensibility: The cropping utility can be easily extended to other states by using the --state parameter.

File Locations

  • Full US Dataset: data/cejst-us.zip (compressed) and data/cejst-us/ (extracted)
  • Maine-Specific: data/cejst-maine.shp (cropped shapefile)
  • Webmap PMTiles: docs/data/cejst.pmtiles (generated from Maine-specific data)