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The KML can then be added to a Google Earth instance (or likely you can double-click on the KML and it will launch and load Google Earth).Įxperience has shown, that KML files with more that 10,000 points do not render well in Google Earth.

Right-click on the Inundation Boundary layer and choose the Export Layer | Save Features to KML menu option.

Create and Inundation Boundary layer in RAS Mapper.

To create a KML, perform the following steps listed below. Provided you have an inundation boundary polygon developed in HEC-RAS, you can export it either to a KML file or to a 3D KML by simply right-clicking on the inundation boundary polygon and selecting the Export Layer menu option. HEC-RAS has two different ways to create inundation maps using the KML format specific to Google Earth. Google Earth, however, is a powerful visualization tool that can be used to display inundation boundary maps. While users can display background imagery using web services in HEC-RAS, it is often not the best way to avail to the results to non-RAS users. This is sometimes done in emergency situations - such as when an area has been hit by a natural disaster and new images would be of valuable assistance to the recovery and relief efforts.HEC-RAS inundation maps are able to tell a complex story of the flooding potential in our river floodplains. However, Google and its image providers do have the ability to rapidly integrate new images into the program. The images are acquired by satellites, processed by commercial image providers or government agencies, and then updated to the Google Earth image database in batches. Large cities generally have more recent and higher resolution images than sparsely inhabited areas.Ī misconception exists among some people that the images displayed in the Google Earth program are live-updated directly from satellites.

Most of the images in Google Earth were acquired within the past three years, and Google is continuously updating the image set for different parts of the Earth. Hope you enjoy! Recent Images, Updated Regularly We are simply enthusiastic users of the Google Earth product. We frequently use Google Earth for research, learning, and fun! We receive no compensation from Google for recommending their service. The button above takes you to the Google website where you can download Google Earth software for free.