1. Landscape Layer Processing - USEPA/StreamCat GitHub Wiki

Processing Steps

• Download data into dedicated location.
• For raster datasets, save as .tif files (saving from ArcPro, using gdal, or using rasterio in Python)
• In ArcPro use the "Project Raster" tool and set "Output Coordinate System" to "USGS Albers Equal Area Conic"
• Perform a visual inspection of dataset for gaps, edges, and other anomalous features. Verify how "no-data" values are represented and record values as no-data where appropriate (for instance, if "no-data" locations are represented by 0's or -9999, convert to no-data value such as "null").
• Isolate catchments that exist on US border and clip them to the areas that exist within the US to calculate the percent full for these catchments.
• Record Data source, date, units, and resolution into project tracking spreadsheet "Control Table"