This tutorial covers how to utilise some of GeoTools Build tools for Road development

1. Open the drawing named lesson9.dwg which is located in your GeoTools Tutorials folder. This folder is located in the folder where you have installed GeoTools.

2. You should see a drawing (see Image 10-1) of a small layout of road center-line represented by 3D Polyline along with a building.

Image 10-1

3. Now we will see how to create right-of-ways by offsetting the road center line on either sides by specified distance. 

Creating Right-of-ways

1. Click on menu GeoTools => Build => Make Right-of-way / Pavements or type GT_ROWMAKER at the command prompt.

2. This will pop-up the dialog box as shown below in (Image 10-2)

Image 10-2


3. Type 20' Ft in Width of R-O-W box for ofsetting the road center line 20' Ft on either sides. Then click on Select button for specifying the layer for offsetted lines.

4. This will pop-up the dialog box as shown below in (Image 10-3)

Image 10-3


5. Choose the layer name Pavement and click on OK button this will bring you back to the dialog box as shown below in (Image 10-4) displaying the name of the layer Pavement. in ROW layer

Image 10-4


6. Next click on OK button this will pop-up the standard selection dialog box as shown below in (Image 10-5)

Image 10-5


7. Now click on Scan selected objects button and select the 3D Polyline press Enter key when done this will bring you back to the standard selection dialog box.

8. Lastly click on Apply button to offset 3D polylines on either sides with specified width and in selected layer. As shown below in (Image 10-6)

Image 10-6

So we have learnt how to create Right-of-way / Pavement with the given road centerline. Now in similar method we will create Curb and Shoulder

Creating Curb and Shoulder

For creating the Curb and Shoulder repeat the above steps from step 1 to 8  from Creating Right-of-ways by specifying offset distance 25' Ft for Curb and 
30' Ft for Shoulder and select the appropriate layers i.e. for Curb select the Curb layer and for Shoulder select the Shoulder layer. This will create the Curb and Shoulder at 25' and 30' Ft respectively in selected layers as shown below in (Image 10-7)

Image 10-7

So after learning how to utilise GeoTools Build tools for road development now we will see how to create Frontage clearance for buildings

Creating Frontage Clearance

1. We will see how to create the frontage clearance for the Golf Links Building with varying offset distance.

2. Click on menu GeoTools => Build => Multiple variable polyline segment offset or type GT_MVOFFSET at the command prompt.

3. You will be prompted to select the polyline, so select the polyline which is at 45 degrees as shown below in (Image 10-10)

Image 10-10

4. Now you will be prompted to specify the side to offset so click outside the polyline.

5. Next you will be prompted to enter the offset distance so enter 10' Ft. This will offset the selected polyline segment by 10' Ft.

6. Now you will be prompted to select the Offset segment, so for offseting the next segment type "N" which will highlight the next segment of polyline.

7. Next you will be prompted to specify the offset distance, so specify 12' Ft. This will offset the polyline outside by 12' Ft distance.

8. Now for offseting the other two segments repeat the steps 6 and 7 and specify the offset distance 15' Ft and 8' Ft respectively and then to end the command type "X". you should get the result as shown below in (Image 10-8).

Image 10-8



9. Finally to complete the Frontage Clearance extend the segments offseted outside and join them. So you should get the completed drawing as shown below in (Image 10-9).

Image 10-9