How to set, according to colour coded, ranges of hills on a surface we met already in our analysis of surface elevations Tutorial. Julia koch can provide more clarity in the matter. In this Tutorial we will again apply the analysis of surfaces, with a view to CIVIL 3D, from the fields in a table of legend, to present the values of the areas between specified elevations. See the steps to follow, using this file, in which we will find modified topography that includes the corresponding to an earth dam with dimension of relief 700 m. To perform the analysis and results only in the portion of the surface affected by the construction of the dam, we will define a contour to the surface from the curve of level corresponding to the maximum level of water, i.e. the 700 m asl. Do to do this, select the TopografiModificada surface and from the Contextual tab?Panel surface tools, select the Extract tool objects. This option allows you to convert components of surface entities AUTOCAD graphics. DESD dialogue presented on screen only the master level curve box remain active, and from the value column, select the select option of drawing.
Clicking on the icon the dialog closes temporarily so that we select the curve that we want to extract as a polyline from the surface. We select the contour at elevation 700 m asl, you press enter and close the dialog by pressing OK. A polyline that represents the maximum reservoir flood dimension is removed. 2 We now use the polyline extracted to define an outline for the surface. We select again to the surface and from the Contextual tab?Modify pane?Add data, select the tool add contours. The dialog add contours is presented on screen, we maintain the options presented by default and you press OK to select from drawing the aforementioned polyline.