Parcels converted to spaces (left) and polylines (right)
5 If you want to clip the surface model using the boolean union of all parcels as the model boundary, select
Clip Surface Model at Combined Parcel Boundary.
If this check box is selected, you can also enter an offset from the boundary.
6 Enter a value for Model Base.
This creates an extrusion of the surface outer boundary from the value you enter starting at the lowest
surface point.
7 If you want to generate contours from the surface data you are importing, select Generate Contours from
Surfaces.
Mass element and contour lines generated from surface data
NOTE If you want to see the actual surfaces of the converted mass element, such as a TIN model, you can display
the mass element without Gouraud shading.
8 Indicate how you want the contours to be created by selecting either Polylines or Slice Objects.
9 Enter an interval value for the vertical spacing of the contours.
NOTE Because slice objects shade their entire area, they can interfere with the appearance of the surface itself
in shaded or hidden line views.
10 Click Import.
Selecting Layer Keys for LandXML Data
Use this procedure to set a default layer key for the different types of LandXML data being imported. You can set layer
keys individually for COGO points, parcels, surfaces, and contour lines.
If you do not define specific layer keys for your LandXML data, the imported data is placed on the default layer keys
specified for LandXML data, TINN (Surfaces), PRCL (Parcels), COGO (COGO Points), and TOPO (Contours).
You can also define a specific space style for parcels that are imported as spaces.
1 Click Insert menu
2 Select a LandXML file to import, and click Open.
3 Click Defaults.
LandXML.
Selecting Layer Keys for LandXML Data | 135
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