![]() Experimentation with your data and study area may be required to discover the best option for you. These option control what the KML will look like in Google Earth. There are several options available when exporting the inundation boundary 3D KML. You can now visualize the water level in perspective to cars, buildings, sign posts and other features to inform you how the flood hazard. Choose a location and enter " Street View". Providing interaction with the map is very useful, but there are better ways to visualize results in Google Earth. While the point values are exacting, they do lend insight into the potential hazards for a particular area for the event being considered. This is more obvious if we turn on the polygon boundaries, as shown in the figure below. The reported results in the 3D KML are values based on interpolated HEC-RAS results for the center of the 3D KML polygon. The depth, water surface elevation, and velocity for that area will be reported.Īt this point, let's make it clear that the 3D KML file you are visualizing is a vector representation of an HEC-RAS results grid. The 3D KML file allows you to interact with it by clicking on a particular location. Interacting with the map is when the "3D" aspect starts to get interesting. The 3D KML file may initially look a lot like the 2D KML file discussed above, as Google Earth will zoom to the extents of the data. The smaller file size will improve sharing the floodplain inundation. The final file is a KMZ file, which is a zipped up KML file. The KMZ can then be added to a Google Earth instance (or likely you can double-click on the KMZ and it will launch and load Google Earth). ![]()
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