Material errors are logged
We record changes that alter a result, data source, calculation method or important factual statement. Small style edits are not presented as substantive corrections.
Transparency
Corrections & Change Log
When MapBench finds a factual, calculation, data-source or implementation error that materially changes what a page tells the user, we correct it and record the change here. Routine design polish and minor wording edits are not listed as corrections.
| Date | Page | What was wrong | What changed |
|---|---|---|---|
| 14 Oct 2026 | Moonrise & Moonset | The page loaded a moon-phase interface instead of a location-based moonrise and moonset workflow. | The tool now calculates moonrise, moonset and upper transit for the selected location and date, with local-time context and moon-phase information. |
| 14 Oct 2026 | Magnetic Declination | The page reused a true-bearing workflow and did not calculate magnetic declination from a geomagnetic model. | The tool now uses the British Geological Survey World Magnetic Model 2025 service and clearly separates true and magnetic bearings. |
| 14 Oct 2026 | Population Within Radius | US results were based on a curated major-city dataset and could not represent suburban or rural population well. | US mode now uses Census ZCTA population and housing data with ACS demographic context, while clearly describing the centroid-based approximation. |
| 14 Oct 2026 | Cities Within Radius | US coverage was limited to the curated world-city list. | US mode now uses Census incorporated places and census-designated places; the global curated-city fallback remains for worldwide use. |
| 14 Oct 2026 | ZIP Codes Within Radius | The lookup depended mainly on OpenStreetMap postcode search and could return a limited result set. | US mode now uses Census ZIP Code Tabulation Areas with 2020 population and housing context, and explains that ZCTAs are not USPS delivery polygons. |
| 14 Oct 2026 | Indexing and locale routes | Untranslated locale tool URLs could be discovered even when the underlying content fell back to English, and filtered tool-directory URLs were crawlable. | Retired locale routes now consolidate to canonical English destinations, translated alternates were removed from the sitemap, and filtered tool-directory variants are noindex with clean category hubs used for internal linking. |
How MapBench handles corrections
Methods are rechecked
A reported issue is tested against the implemented calculation and the documented source before the result or explanatory text is changed.
Affected pages stay linked
Each entry points back to the relevant tool or policy page so readers can review the corrected version, method and current limitations.
Report an error
Send the affected URL, the input or statement you believe is wrong, the expected result, and a source when one is available. We review reproducible reports against the implemented method and documented source data.
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