date:
observer:
island(s):
location:
color and shape, estimated bleaching:
species:
depth:
water temperature:
comments:
record ID:
Photograph:
Location:
Search optional free-form text submissions...
Comments:
Search optional free-form text submissions...
The Hawaiian Koʻa (Coral) Card was developed at the University of Hawaiʻi to help members of the general public, or community scientists, contribute observations assessing coral bleaching across the state. The observed coral color is used as an indicator of coral health. Color scores are based on actual colors of bleached and healthy Hawaiian corals. A photo and other data may also accompany each record. These data are publicly accessible through this mapping platform and provide a critical resource for researchers, policy makers, and community members.
For further details, please visit our website at:
pacioos.org/ccp
When there are too many observations to display concurrently in a given location, the following icons will indicate the number of observations clustered in that general area:
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low | medium | high |
Clicking on one of the above cluster icons will zoom into that area of the map for closer inspection.
Otherwise, a map marker will be displayed at the location of each observation. These markers include a diver icon and are colored by the observed coral color . Here are a few examples:
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0 | 9 | 12 | 19 | 31 | 35 |
When there are multiple observations at the same location, the highlighted green marker shown below will be displayed. Clicking on the highlighted marker will "spiderfy" into the multiple markers at that location. This will display them in a fan-like appearance around the map location, as the following example illustrates:
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Click on any marker to produce a pop-up window with further details about that observation. This may include some or all of the following: date and time of the observation, the name of the observer, the latitude and longitude coordinates of the observed location, a site photograph, coral color and shape, estimated bleaching percentage, species name, depth, and/or water temperature:
Note how the coral color and coral shape attributes are combined into a single graphical tile, as the following examples further illustrate. The color score (an integer between 0 and 35) is indicated in the upper-right while the color that the score represents is used as the tile's background color. The shape category of the observed coral is also indicated with one of four graphical icons in the center of the tile:
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If the observer has estimated the percentage of coral bleaching, this will be depicted using one of the following gauge icons. Note that these estimates can be recorded in one of five ranges: 0-10% (no or minimal bleaching), 10-25%, 25-50%, 50-75%, or 75-100% (full or nearly complete bleaching):
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Clicking on "more info" in the pop-up window will open a sidebar with additional information about the observation. This will include any further comments and placenames submitted by the observer, if any, as well as the observation's record ID in the database. Note that you can use this record ID to link directly to the observation in the map viewer: e.g., http://pacioos.org/ccm?id=1. If a photograph was included, the sidebar will also provide the ability to view and download the full resolution image.
You can search and filter the available observations by clicking on the magnifying glass near the upper-left corner of the map:
This brings up a "Search Data" window that allows you to limit the displayed markers to observations that meet one or more selected criteria, such as a date range, coral color(s), coral shape(s), the observer's name, etc. Note that some attributes are optional submission fields and were not recorded for all entries. This is indicated in the search window with a cautionary note or by the inclusion of a "n/a" selection option.
When sharing these data, please cite our project with the following attribution:
© Hawaiian Ko'a Card, <year of observation>. Some rights reserved. Licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0).
Please also cite the following related publication:
Bahr, K.D., S.J.L. Severino, A.O. Tsang, et al. 2020. The Hawaiian Koʻa Card: coral health and bleaching assessment color reference card for Hawaiian corals. SN Appl. Sci. 2, 1706. https://doi.org/10.1007/s42452-020-03487-3.
The Hawaiian Koʻa Card project is managed by the Hawaiʻi Institute of Marine Biology (HIMB) within the School of Ocean and Earth Science and Technology (SOEST) at the University of Hawaiʻi at Mānoa (UH).
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This mapping platform and accompanying data submission utility were developed by the Pacific Islands Ocean Observing System (PacIOOS), a member of the U.S. Integrated Ocean Observing System (IOOS).
Visit our data submission platform to contribute your own Coral Card observations:
Data for this project—including map locations, coral colors, photo URLs (if any), and other attributes—are stored in the following geographic information system (GIS) layer via GeoServer:
id: hi_himb_all_coralcard
access methods:
metadata:
Questions or comments? Please let us know:
The Hawaiian Koʻa (Coral) Card was developed at the University of Hawaiʻi to help members of the general public, or community scientists, contribute observations assessing coral bleaching across the state. The observed coral color is used as an indicator of coral health. Color scores are based on actual colors of bleached and healthy Hawaiian corals. A photo and other data may also accompany each record. These data are publicly accessible through this mapping platform and provide a critical resource for researchers, policy makers, and community members.
For further details, please visit our website at:
Questions or comments? Please let us know:
When there are too many observations to display concurrently in a given location, the following icons will indicate the number of observations clustered in that general area:
![]() |
![]() |
![]() |
![]() |
![]() |
low | medium | high |
Clicking on one of the above cluster icons will zoom into that area of the map for closer inspection.
Otherwise, a map marker will be displayed at the location of each observation. These markers include a diver icon and are colored by the observed coral color . Here are a few examples:
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |
0 | 9 | 12 | 19 | 31 | 35 |
When there are multiple observations at the same location, the highlighted green marker shown below will be displayed. Clicking on the highlighted marker will "spiderfy" into the multiple markers at that location. This will display them in a fan-like appearance around the map location, as the following example illustrates:
![]() |
![]() |
Click on any marker to produce a pop-up window with further details about that observation. This may include some or all of the following: date and time of the observation, the name of the observer, the latitude and longitude coordinates of the observed location, a site photograph, coral color and shape, estimated bleaching percentage, species name, depth, and/or water temperature:
Note how the coral color and coral shape attributes are combined into a single graphical tile, as the following examples further illustrate. The color score (an integer between 0 and 35) is indicated in the upper-right while the color that the score represents is used as the tile's background color. The shape category of the observed coral is also indicated with one of four graphical icons in the center of the tile:
![]() |
![]() |
![]() |
![]() |
If the observer has estimated the percentage of coral bleaching, this will be depicted using one of the following gauge icons. Note that these estimates can be recorded in one of five ranges: 0-10% (no or minimal bleaching), 10-25%, 25-50%, 50-75%, or 75-100% (full or nearly complete bleaching):
![]() |
![]() |
![]() |
![]() |
![]() |
Clicking on "more info" in the pop-up window will open a sidebar with additional information about the observation. This will include any further comments and placenames submitted by the observer, if any, as well as the observation's record ID in the database. Note that you can use this record ID to link directly to the observation in the map viewer: e.g., http://pacioos.org/ccm?id=1. If a photograph was included, the sidebar will also provide the ability to view and download the full resolution image.
You can search and filter the available observations by clicking on the magnifying glass near the upper-left corner of the map:
This brings up a "Search Data" window that allows you to limit the displayed markers to observations that meet one or more selected criteria, such as a date range, coral color(s), coral shape(s), the observer's name, etc. Note that some attributes are optional submission fields and were not recorded for all entries. This is indicated in the search window with a cautionary note or by the inclusion of a "n/a" selection option.
When sharing these data, please cite our project with the following attribution:
© Hawaiian Ko'a Card, <year of observation>. Some rights reserved. Licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0).
Please also cite the following related publication:
Bahr, K.D., S.J.L. Severino, A.O. Tsang, et al. 2020. The Hawaiian Koʻa Card: coral health and bleaching assessment color reference card for Hawaiian corals. SN Appl. Sci. 2, 1706. https://doi.org/10.1007/s42452-020-03487-3.
The Hawaiian Koʻa Card project is managed by the Hawaiʻi Institute of Marine Biology (HIMB) within the School of Ocean and Earth Science and Technology (SOEST) at the University of Hawaiʻi at Mānoa (UH).
![]() |
![]() |
![]() |
This mapping platform and accompanying data submission utility were developed by the Pacific Islands Ocean Observing System (PacIOOS), a member of the U.S. Integrated Ocean Observing System (IOOS).
Data for this project—including map locations, coral colors, photo URLs (if any), and other attributes—are stored in the following geographic information system (GIS) layer via GeoServer:
id: hi_himb_all_coralcard
access methods:
metadata:
Visit our data submission platform to contribute your own Coral Card observations:
This mapping platform and companion data submission utility were developed by the Pacific Islands Ocean Observing System (PacIOOS), a member of the U.S. Integrated Ocean Observing System (IOOS): info@pacioos.org
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