![]() ![]() After you’ve found the location that you want to download, select an area to download using the download by rectangle tool in the lower left hand of the toolbar. The toolbar on the left hand side of the screen allows you to move around the map, zoom in and out, and select area to download. If you are downloading Canadian, Central American, or South American terrain, you will need SRTM 30m and SRTM 90m selected. In the "Download Layers" section at the top right corner (boxed in blue in this screenshot), select only NED and 1/3" NED for US maps. You should see this map once the applet loads When the page loads, click on one of the two buttons entitled ’View and Order Data Sets’, corresponding to whether you want to download maps of the US or of the World (currently only North and South America are available). Now that you’ve installed MICRODEM you will need to get a DEM (Digital Elevation Model). ![]() I apologize for the length and complexity, but it should be fairly easy to follow.įirst you will need to get a program called MICRODEM. Also, a big thanks goes out to Odd8ball for helping me so diligently with the calculations and DarkMatter and ExtinctSKB for finally getting through to my thick skull on how SC4 does its 3D projection. Many of the instructions here are taken from his excellent omnibus article. First, let me give huge thanks Rybolton, for creating the original instructions on how to use the USGS data, without which I would have never even thought this project to be possible. ![]()
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