Once you have downloaded that you can unzip it and load it into QGIS. The simplified world borders shapefile they have works well to give a general outline of the coast. The website contains some good simplified coastline shapefiles.
However, a detailed version might take a long time to perform the clipping. Using a simplified version will allow the clipping operation to run fairly quickly, but won't give a highly accurate coastline. You can find highly detailed versions or simplified versions.
3d earthquake software mac os download#
You can use QGIS to clip the polygons.įirst download a shapefile that represents the coastline. The shakemap doesn't distinguish between the land and ocean, so for areas along the coast, like this Northridge quake, it can be helpful to clip the shapefile to the land border to provide geographic context. I'll be converting the PGV map to a 3D model, but the same steps apply for any of the other shapefiles in the archive. You can read about these various measurements. PGA is peak ground acceleration, PGV is peak ground velocity, and MMI is Modified Mercalli Index. The shapefile download of an earthquake contains multiple shapefiles that represent different measurements of shaking. The specific shapefile download that we'll use is here. On the page for a specific earthquake you can find the shapefile downloads under Downloads > GIS File > Shape Files. This tutorial will map the Southern California Northridge earthquake of 1994. For this tutorial we'll focus on a few major historical earthquakes. The scenarios are modeled hypothetical earthquakes that might occur as worst-case scenarios along major fault lines.
You can find both historical earthquakes as well as scenarios.
3d earthquake software mac os archive#
Any large earthquake can be found in their archive of shakemaps. Sumner (2008) A Geoscientist’s Perspective on Immersive 3D Data Visualization, Computers and Geosciences, Vol 34/9 pp 1056-1072. DOI: 10.1016/j.cageo.2007.11.The USGS uses a worldwide network of sensors to automatically produce shakemaps of all major earthquakes that occur throughout the world. We also address some of the main obstacles to widespread use of VR environments in scientific research with a user study that shows 3DVisualizer is easy to learn and to use in a VR environment and can be as effective on desktop systems as native desktop applications. Three case studies are presented that illustrate the direct scientific benefits realized by analyzing data or simulation results with Visualizer in a VR environment. While many of the capabilities of 3DVisualizer are already available in other software packages used in a desktop environment, the features that distinguish 3DVisualizer are: (1) 3DVisualizer can be used in any VR environment including the desktop, GeoWall, or CAVE, (2) in non-desktop environments the user interacts with the data set directly using a wand or other input devices instead of working indirectly via dialog boxes or text input, (3) on the desktop, 3DVisualizer provides real-time interaction with very large data sets that cannot easily be viewed or manipulated in other software packages. However, 3DVisualizer can also be used on desktop systems (unix/linux-based operating systems including Mac OS X) with a similar level of real-time interactivity, bridging the ‘‘software gap’’ between desktop and VR that has been an obstacle for the adoption of VR methods in the Geosciences. As an application developed for VR from the ground up, 3DVisualizer realizes benefits that usually cannot be achieved by software initially developed for the desktop and later ported to VR.
3DVisualizer uses carefully optimized algorithms and data structures to support the high frame rates required for immersion and the real-time feedback required for interactivity. 3DVisualizer was developed specifically for interactive, visual exploration of gridded data in immersive virtual reality (VR) environments.
0 kommentar(er)
