Global Airborne Observatory: Example Rapid Water Quality Maps of Hawaiian Island Coastline

Example maps from the publication:

Nicholas R. Vaughn, Marcel König, Kelly L. Hondula, Dominica E. Harrison and Gregory P. Asner. 2024. Rapid Water Quality Mapping from Imaging Spectroscopy with a Superpixel Approach to Bio-Optical Inversion. Remote Sensing. (in press)

Data:

Maps of water quality and auxiliary information produced from Global Airborne Observatory (GAO) VSWIR Spectrometer data for five example sites:

Site
Island
Date Collected
Time Collected (24hr)
Latitude
Longitude

1. Pelekane Bay
Hawaiʻi
30 October 2023
10:02
20.0243
−155.8256

2. East Kaho’olawe
Kaho’olawe
22 January 2024
09:15
20.6027
−156.5638

3. Hilo Bay
Hawaiʻi
15 January 2023
11:30
19.7353
−155.0636

4. Mā’alaea Bay
Maui
22 January 2024
10:19
20.7805
−156.4842

5. South Moloka’i
Moloka’i
7 January 2024
11:31
21.0866
−157.2159

There are 41 maps for each example site:

A single 3-band true-color map of the example site for reference (Site_3band.tif)

A single full-resolution water quality map produced using a bio-optical inversion model on each pixel (Site_PixelbyPixel.tif)

For each of 13 different superpixel size settings (50px, 100px, 250px, 500px, 600px, 750px, 1000px, 1250px, 1500px, 2000px, 3000px, 4000px, 5000px), a map of the superpixel ID of each pixel (Site_Size<####>_ClusterID.tif)

For each of 13 different superpixel size settings, a superpixel-level map of water quality as estimated at the cluster level. (i.e., each pixel in a superpixel will have the same values, Site_Size<####>_Cluster_Preds.tif)

For each of 13 different superpixel size settings, a full-resolution water quality map produced by interpolation of the superpixel level maps in 4. above (Site_Size<####>.tif)

All files are in GeoTiff format using 32-bit floating point values. Most are compressed with the LZW algorithm. Maps are not georeferenced. No data value for map types 2-5 is -9999.