golamrob/water-hyacinth-flowers-floating-pond

Water Hyacinth Flowers — Khurushkul Pond, Bangladesh

150 ground-level photographs of water hyacinth (Eichhornia crassipes) blooming in a freshwater pond near Khurushkul, Cox's Bazar, Bangladesh. All frames were captured in a single session on 9 August 2026 (16:31–16:45 local time) during the monsoon season.

This is a follow-up survey of the same pond documented in the June 2026 water lily / water hyacinth dataset by the same photographer.

Contents

• —150 JPG images, 2000×1333 px, sequentially numbered water-hyacinth-flowers-floating-pond-001.JPG through -150.JPG
• —metadata.jsonl — one record per image with capture time, camera settings, keywords, and location fields

Capture methodology

All images were shot handheld with a Nikon D7200 and a 50mm f/1.8 lens at ISO 100. Aperture was held at f/6.3 across the session; shutter speed varied with the light. Images are downsized JPG exports from RAW (NEF) originals.

Location and positioning

The camera used has no built-in GPS and these files carry no per-image coordinates. Location is recorded at the site level only: a freshwater pond near Khurushkul, Cox's Bazar District, Chattogram Division, Bangladesh. This dataset is suitable for species identification, vegetation coverage, and bloom-stage tasks — not for per-frame geospatial referencing.

Known limitations

• —Single site, single 14-minute session, single afternoon lighting condition
• —No per-image GPS coordinates
• —One species in bloom; no negative or contrast classes included

License

CC BY 4.0. Free to use, share, and adapt for any purpose, including commercially, provided appropriate credit is given to Golam Rob (golamrob.com).

Citation

Golam Rob (2026). Water Hyacinth Flowers — Khurushkul Pond, Bangladesh.
Ground-truth environmental image dataset. golamrob.com. CC BY 4.0.

More datasets

Catalog of ground-truth environmental datasets from coastal Bangladesh: https://golamrob.com