Week 4 Challenge

1. Create a terrain model by different methods –

1. By Graphical Filter
2. By text interpolation
3. By elements

METHOD -1

By Graphical Filter :Step 1: Opening File

Open a New file with a 3D seed file - Set name as Terrain by Graphical filter and click save to open file

Step 2: Attaching Survey data

In-Home tab click on Attach tools and click on references - Click on Attach and select '3D_Survey Graphics file - Set attachment method as interactive - Click open - Click ok and click fit view to view the file

Step 3: Using Graphical Filter

Go to the Terrain tab and click on From graphical filter - Click on Terrain Filter manager - Add New filter groups and filters as follows - Name filters as Spots and brake lines - Set Feature according and add levels of spots and Levels accordingly as follows - Click finish - Add spots filter to the terrain filter group - Click finish - go to Graphical filter - Select the filter group created - Set Edge method as 'Remove Slivers" – Set Feature Definition as Existing triangles.

METHOD -2

By Text interpolation: Step 1: Opening File

Open a New file with a 3D seed file - Set name as Terrain by text interpolation and click save to open file

Step 2: Attaching Survey data

In-Home tab click on Attach tools and click on references - Click on Attach and select '3D_Survey Graphics file - Set attachment method as interactive -Click open - Click ok and click fit view to view the file

Step 3: Creating terrain

Go to the Terrain tab and click on Terrain by Additional Method - In that click Create Terrain model by Text interpolation - Click on Terrain Filter Manager - Create Text Filter using elements type as text - Create Lines filter using element type line string - Create filter group using only Lines filter created above - Set all the parameters in the popup box - Set edge method as Remove Slivers - Feature definition as Existing Triangles - Left-click to complete the process.

METHOD -3

From Elements

Step 1: Opening File
Open a New file with a 3D seed file - Set name as Terrain from elements and click save to open file

Step 2: Attaching Survey data

In-Home tab click on Attach tools and click on references – Click on Attach and select '3D_Survey Graphics file - Set attachment method as interactive - Click open - Click ok and click fit view to view the file

Step 3: Terrain from elements

Click on Terrain From Elements - Set feature type as Spot - Set edge method as remove slivers - Feature Definition as Existing Triangles - Go to the Home tab and click o Level display - Click on the reference file - Do Right-click and click on "ALL OFF" - Select Layer 38 which is spots - Go to Element selection by layer and click on Line to select all spots - We can see 13231 spots got selected - Right-click to reset -The resulting Triangles appeared as below.

2.Edit the terrain model created

Aim: Edit the terrain model

Procedure:

Step 1: Open Terrain Model -Create a new dgn file using the '3D seed imperial' seed file - Set name as terrain editing - Open the terrain from graphics elements created earlier - Click open and click fit view - Set overrides as yes.

Step 2: Editing Terrain Model

Go to the Terrain tab click on edit terrain - Use various options and delete unwanted spots and triangle

1. Remove spot – Place the cursor on the spot until a white spot is visible and click to delete
2. Delete Edge triangles - Place the cursor on the unwanted edge triangle to delete.
3. Swap triangle side - Select the triangle side to swap
4. Add Vertex - Place the cursor on the area where a new vertex is needed and select the spot
5. Move Vertex can be used to move the vertex
6. Delete triangle line is used to delete the unwanted lines of terrain created using a line drawn a specific direction

3. Annotate the contours with labels

Aim: Annotate the contours with labels

Procedure:

Step 1: Open Terrain Model

Step 2: Labelling Contours

Go to the terrain tab and click on Labelling terrain Contours - Set the following settings - Select the terrain model - Annotation mode as All Contours - Text Alignment as Follow Line - Style as "Label Pin Alignment Name" - Zoom in the terrain view and label the contour

4.Change the contour interval.

Aim: change the contour interval

Procedure:

Step 1: Open Terrain Model

Step 2: Change Contour interval - Click the terrain model and hover to view properties of the terrain - Click on properties - Click on Terrain ET - Select the Calculated Features - Click on contours - Change the contour Intervals major as 20' and minor as 5'.