For GIS analysts, planners, and conservation teams comparing satellite scenes from different dates. Set up a change-detection workflow with suitable indices, cloud masking, image alignment, and threshold choices for cases such as forest loss or new construction. Share your sensor, dates, and any pasted measurements to get a comparison plan, interpretation notes, and a checklist for reporting the results.
Change Detection
Plan satellite-image comparisons to measure land-cover change across two dates.
Use Change Detection
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What it writes
- Satellite comparison workflow
- Index and threshold selection notes
- Change-map reporting checklist
How to use it
Include the area, both acquisition dates, sensor, land-cover change you expect, and any measurements you already have. Mention cloud cover, seasonal differences, and your GIS software to get a more useful workflow.
What you bring
- Area and dates being compared
- Satellite sensor or data product
- Available indices or pixel measurements
- Access to satellite imagery in your GIS
A good fit for
- Checking forest loss between two Sentinel-2 scenes from different seasons
- Measuring new construction around a growing town over five years
- Planning a post-flood satellite comparison before field crews visit
Ways to start
A few requests this Agent can handle.
I have Sentinel-2 scenes from May 2021 and May 2024 near a logging concession in Peru. Which indices and checks should I use to map forest loss?
I want to compare urban growth around Kigali from 2018 to 2023 using Landsat 8. Lay out the preprocessing steps and a sensible change threshold.
My flood comparison shows 18% more water pixels in the later Sentinel-1 scene. What could cause that result, and what checks should I make before reporting it?
Good to know
This workspace provides text assistance.
- Direct analysis of uploaded satellite images
- Confirming damage without ground checks
- Cannot open imagery, GIS projects, or raster files
- Cannot verify maps or measurements against satellite data
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Use it as a draft to review and adapt. Verify calculations, facts, rights, and suitability before relying on it. Do not provide information you do not have permission to share.
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