GeoWhisperer searches historical aerial imagery, compares dates, and highlights visible physical changes so researchers and journalists can quickly build before-and-after visual evidence.
GeoWhisperer automates searches of Esri's World Imagery Wayback archive to find historical aerial images for a given location.
It compares imagery using an AI that works on a 3x3 grid, reporting only changes that are visible in the images and providing evidence cards and exportable comparison outputs.
Outputs include side-by-side images, short video comparisons, and one-page PDF reports useful for OSINT, journalism, and visual mapping.
# What GeoWhisperer does
# How it finds imagery Enter coordinates, a place name, or a map link and GeoWhisperer searches Esri's World Imagery Wayback archive for suitable aerial photos. You can skip the archive step by uploading a recent geotagged photograph instead. Uploaded images are processed locally in the browser rather than uploaded to a server.
# How it compares images
# Outputs and exports When the tool finishes a comparison you can export results in three practical formats:
These formats make it straightforward to include the visuals and supporting evidence in reporting or investigation notes.
The blog illustrates GeoWhisperer by comparing aerial imagery of London's Queen Elizabeth Olympic Park across dates. The before-and-after view shows the park's landscape being replaced by high-density residential development. The author notes that this change occurred gradually since 2012 under the London Legacy Development Corporation and that the imagery comparison was created in seconds using GeoWhisperer.
# Design choices that matter for investigations GeoWhisperer is built to reduce guesswork in imagery comparison:
# Practical limitations implied by the design
# Who should consider using GeoWhisperer
# Quick operational tips
# Bottom line GeoWhisperer streamlines the routine but time-consuming task of finding and comparing historical aerial imagery. It focuses on visible, image-backed changes and packages results in formats designed for reporting and investigative workflows.
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