Copyright (c) 2026 Paul Frazier

This repository mixes three kinds of material, licensed separately.

1. CODE: MIT License
   Applies to all source code: *.py, *.js, *.sh, and the scripts, styles and markup
   that build the HTML pages.

   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal
   in the Software without restriction, including without limitation the rights
   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   copies of the Software, and to permit persons to whom the Software is
   furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in all
   copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   SOFTWARE.

2. ANALYSIS, DOCUMENTATION AND RESULTS: Creative Commons Attribution 4.0 International (CC BY 4.0)
   Applies to Paul Frazier's own write-ups, method notes, scorecards, maps and
   derived tables (README, SOURCES, DEFINITIONS, method notes, compare.md,
   scorecards, per-school CSVs, block assignments, traced scenario boundaries,
   and the site pages in pages/).
   https://creativecommons.org/licenses/by/4.0/
   Attribution: "Paul Frazier, PPS boundary options analysis (independent, unofficial)".

3. THIRD-PARTY DATA keeps its own license. See SOURCES.md. In particular:
   - Data derived from OpenStreetMap (walk/bike distance matrices, street lines and
     street-name labels in the pages) is (c) OpenStreetMap contributors and available
     under the Open Database License (ODbL) 1.0: https://opendatacommons.org/licenses/odbl/
     Those derived databases are offered under the ODbL, not CC BY.
   - US Census, NCES and ODE data are US/Oregon public-sector data.
   - PPS documents: the original PDFs are not redistributed here; they are linked
     (SOURCES.md). build/pps-texts/ holds unofficial plain-text extractions of those
     public PPS documents, provided so readers can search and check the figures the
     analysis cites. The documents and their content remain Portland Public Schools'
     work; the extractions may contain errors, and the original PDFs are authoritative.
     These extractions are not covered by the CC BY license above.
   - Figures from other community projects (e.g. meub/pps-data) keep their own
     licenses, credited in SOURCES.md.
   - The Overpass fonts embedded in some pages in pages/ are under the
     SIL Open Font License 1.1 (fonts/OFL.txt).