![]() Convert the site topography to a surface.(I’m hoping to get a tutorial up on navigating that site soon.) The Geospatial Data Gateway from USDA also provides some topographic data. You might have a survey that covers the extent of your site – that’s ideal. If this is for a study that’s going to be run through FEMA it’s really important to incorporate DFIRM data into your model. DFIRM (Digital Flood Insurance Rate Map) from FEMA if available. ![]() ![]()
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