feature (id #6):
|description||Measure of the roughness of seafloor terrain, defined as the ratio of surface area to planar area.|
|atlas page||view PDF (3.8 MB)
(Find in our 2010 printed atlas on page 9.)
|feature GIS data||download ZIP of shapefiles (7.1 MB)|
|Marxan metadata||view online|
|Marxan-ready data||download ZIP of shapefiles (10.4 MB)|
See our Glossary to learn about these terms (metadata, feature GIS data, Marxan-ready data, etc)
for data layer: High Rugosity
custodian — Parks Canada: Greg MacMillan
how to access the restricted data
This feature was created from 1 raw data layer. Each data layer has a custodian and different restrictions as to which types of data BCMCA may distribute on this website. The unrestricted feature and Marxan-ready data are available to download at the map & data tab. To gain access to the restricted data, please go through the following process:
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3 comments about this feature
How is this related to LOS’s and Jeff Ardron’s bottom complexity data?
They are similar indices, both based on bathymetric data and both intended to be indices of high biodiversity. Benthic complexity considers how convoluted the bottom is, not how steep or how rough, though these both play a role. The algorithm to compute high rugosity (roughness) comes in a collection of tools known as The Benthic Terrain Modeller (BTM) tool, developed by the Oregon State University (OSU) Department of Geosciences and the National Oceanic and Atmospheric Administration (NOAA) Coastal Services Center. More information on the specific algorithms used can be found in the BTM’s documentation (). The algorithm to compute benthic complexity was designed by Jeff Ardron and is published by ESRI press, Marine Geography: GIS for the Oceans and Seas (http://esripress.esri.com/display/index.cfm?fuseaction=display&websiteID=61&moduleID=10).
Thanks Karin! That’s great information.