Identifying structure
with your cmor card

The colors on your CMOR Chart are a useful tool to understand the depth and type of bottom. Red represents the shallowest part of the data set and violets are the deepest. So just like the visible spectrum you can rank the depth by color, ROYGBIV - the black shading is relief.
CMOR Mapping Depth Chart

+ SECTION 1


Section 1 showcases a reef. The orange is the top of the structure (shallowest part by color ranking) and you can see black shading outlining a natural shape, with black spots on top outlining holes. This is a great way to identify a hard bottom.

+ SECTION 2


Section 2 showcases a bottom has a similar look the the reef in section 1 but is more consistent with a yellow/green color. This means it does not have a dramatic change in depth, but looks to share a similar visual to the reef which can be identified as a hard bottom.

+ SECTION 3


Section 3 showcases wrecks. You can see the black shading gradually fades to the north without the presence of black spots like section 1. This appears to be a softer bottom with the current pushing north.