Just go to the Extension Warehouse and search for “flatten.” Most of the time when you get information from a surveyor it will be in three dimensions, so keeping the map in 3D may be better depending on what you need it for. Now you have a completed 3D contour map! You can use a plugin to flatten the map if you wish. To do this, right click on the terrain and click “select” > “all with same material” and then hit “delete.” You may want to delete the original topography map if you just want to see the contour lines. The Historical Topographic Map Collection (HTMC) is the set of scanned images of USGS topographic quadrangle maps originally published as paper documents in the period 1884-2006. Right click and select “intersect faces” > “with selection.” Next, click “ctrl” > “A” on your keyboard to select all. It is intended to enable users to quickly make professional, statistical maps for. *Make sure you save before the next step! IMAGE is a web-based-tool used for the production of Choropleth Maps. This will place all of your planes that you just cut over the terrain. Choose this option from the Analysis Menu, or the Analysis Toolbar button. Click on “edit” and select “paste in place” from the dropdown menu. From Terrain Grid From TIN Areas The Create Contours (from Terrain Grid) command allows the user to generate equally spaced contour lines from any loaded elevation grid data. Right click on your terrain and select “unlock.” Then, right click again and select “edit group.”Įdit > Paste in Place. At this point, you can go back to “view” > “hidden geometry” to deselect the hidden geometry lines to save loading time on your computer. Select all of the planes and right click to select “make group.” Then hit “ctrl” > “X” on your keyboard to cut the planes. Again, you may have to experiment until you get enough to cover the height of your terrain. Then type the number of times you want the planes to multiply. Once you have an increment you are happy with, type “ * ” into the “distance” box. The more sloped your terrain is, the higher the number you may want to choose. In the “distance” box in the lower right corner of the screen, type in the number you want each contour to increase by. You may have to experiment to pick the best increment. Then, select an increment that you want the contours to increase by. Contours are typically set at 1′, 2′, 5′, 10′, etc. First, copy the plane you created and place it anywhere above the original. You can save some data in cookies, however there is a limit. You can also change the number of contours or set custom contour values. Go to “view” and select “hidden geometry.” Then select the lowest point in the terrain to snap your plane to.Ĭopy. Go to the desired location in the map, set two markers by clicking the map to define a rectangle (or enter coordinates manually). You may have to turn on hidden geometry to see where you want to snap the plane to. Select the plane and hit “M” on your keyboard. Drag the mouse to create a rectangle that is a bit larger than your terrain. To do this, hit “R” and then press the up arrow on your keyboard to make a rectangular plane on the blue axis. The next step you want to do is make a plane to work from. To see what the 3D terrain looks like, navigate to “file” and hover over “geo-location” to select “show terrain.” Creating a Contour Map
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