Abstract: Coastal Urban ecosystems are under the constant pressure of natural and man made forces. How much is the bedrock layer effected by urban coastal ecosystems? By identifying patterns at the bedrock layer is it possible to identify urban coastal areas through their bedrock profile? What can the bedrock tell us about the current state of our coastal cities? Can a metric for human impact be established by looking at the shape and topographic details of the bedrock?
Introduction: Coastal Urban ecosystems are under the constant pressure of natural and man made forces. How much is the bedrock layer effected by urban coastal ecosystems? By identifying patterns at the bedrock layer is it possib
Data:
The dataset available and suitable for this problem is NOAA's ETOPO1 1 arc-minute global relief model of Earth's surface that integrates land topography and ocean bathymetry. ETOPO1 is built as an aggregate of multiple datasets providing higher resolution of bedrock layers (up to 1 arc second) in certain coastal areas. Custom grids can be extracted by using NCEI's
WCS Client.d This data source was useful because custom grids for higher resolution areas were available for extraction. This saved some time in cutting the global grid into tiles and then extracting the tiles based on the correct layer. It was also helpful to see the tiles extracted as a lat/long bounding box and referenced with a basemap.
One challenge in working with geoTIFF's is that they are huge, especially if they are at 1 arc second resolution. One Tile was about 25MB. My data processing involves stitching together two tiles (at a minimum) and uploading those directly to CUSP compute through Jupyter or as a single file on github was not possible due to file size constraints. The files were uploaded to a server that is hosted at danakarwas.com. This allowed for many large files to be stored.
For further research and development on the ETOPO1 data set please refer to this
paper written by Hirt and Rexer.