Canopyplot: Canopy Cover

Canopyplot is an offline field workbook for canopy surveys. Record point-grid and densiometer counts, line intercepts and crown-ellipse estimates, or inspect an on-device photo mask. Keep canopy cover, sky openness and green fraction separate, and see how each station changes between visits. NEW IN 2.0 - Revisit tracker: compares each station across visits, within the same method and metric only, with the change in percentage points and a flag when 95% intervals do not overlap - Auto threshold: one tap picks the color separation that best splits the image into two classes (Otsu's method) - Backup and restore: save the whole library to one file and merge or replace it later, with a safety copy written first - Edit your library: delete readings, stations, and plots; numeric entry for elevation, distance, slope, and plot area - Sample plots are clearly labeled and can be removed in one step PROTOCOL-AWARE PROJECTS - Maintain a local library of survey plots and stations - Record site codes, observers, terrain, sky, wind, exposure, and field notes - Preserve the method, metric, and date with every observation - Explore two labeled sample plots, then create your own FOUR MEASUREMENT WORKBENCHES - Point grid: record fixed canopy hits and review a Wilson 95% confidence interval - Densiometer: preserve four directional counts and individual replicates - Line intercept: enter crown intervals and merge overlaps before calculating covered length - Crown ellipse: estimate projected crown area with the uncorrected-overlap limitation kept visible INSPECTABLE PHOTO LAB - Analyze a photo selected with Apple's system picker, entirely on device - Compare the original and classified mask side by side - Adjust color separation and minimum brightness for visible-sky openness or green fractional cover, or use auto threshold - Review bright clipping, deep shadow, thresholds, and quality notes before saving - Practice with 14 bundled illustrative training images (practice only; they are not saved as observations) PORTABLE REVIEW PACKETS - Create a PDF report with method summaries, revisit changes, and a dated reading ledger - Export a structured CSV observation table and a revisit-changes CSV - Include complete project JSON, which can also be restored into the library - Share them together with the standard iOS share sheet METHODS YOU CAN INSPECT Canopyplot links directly to USDA Forest Service field guidance, an EPA field operations manual, and peer-reviewed smartphone canopy-photography and threshold studies. Canopy cover, canopy openness, green fractional cover, crown closure, leaf area index, and light transmittance are different quantities. Canopyplot does not certify a survey, identify species, estimate leaf area index, or replace an approved protocol. Use the method required by your project and document any departure in the field notes. EVERYTHING INCLUDED One purchase, no subscription. All project data stays in the app's private container unless you choose the share sheet or a backup file. Photos are processed on device and are not uploaded or stored. No account, camera permission, in-app purchase, advertising, analytics, or tracking.