Sometimes there is confusion over the what a pad object is and what a grade limits object is in site modeling. The pad changes the site model (it is the 3D object) and the grade limit controls how much of the site is affected by the pad.
This manual is the last manual on the series on site modelling on site modifying because the roading tools quite often used as site modifiers. Don’t forget to refer to the previous two month’s manuals (1506 and 1507) for more information on site modelling. This manual looks specifically at the six different roadway tools:
The Roadway (NURBS)
Roadway (Custom Kerb)
Thelast two tools are very powerful and most of the manual will focus on those.
- creating a site model from an image
- importing a shape file
- using GIS information from a local body website
- site modifier contour mode
- hardscape changes in Vectorworks 2016
- creating a site model
- placing site modifiers
- placing a road
In Vectorworks 2016 there is now a faster way to set the graphic attributes on your site models so that it uses the class settings for the line weights, colours, and line styles of the class. This will allow you to usual classes to change the graphic style of your site models after you have created them.
The settings for the Maximum and Minimum elevations allow you to choose how much of the site model you see. Think of these settings as a filter, choosing how much of the site model you want to see. For example, you might have a site model that goes from sea level to 100m, but the building site is around 85m. You could filter the site model from 65m-95m, so that you only see the important parts.
In this session we looked at site modelling again. In particular, we looked at a special case where we wanted to create site modifiers above the site model (it’s actually a construction pad above the level of the site model for drainage). This is probably the first time that we have looked at the concept of site modelling, how it actually works and I’ve drawn an example to show exactly how Vectorworks calculates the contours.
I had a client ask about this dialog box the other day. They thought that it was a bit confusing and wondered if it would affect the site model. The answer is that it only affects the visual presentation of the site model and does not affect the mathmatics behind the model. The Maximum and mimimum settings are used to filter the presentation of the model to the elevations that you want. The reason for the dialog is that something that you have created (something that affects the site model) is above the maximun elevation or is below the minimum elevation. Vecotrworks is asking if you want to change the maximum and minimum settings so that you can see the new obejct and its affect on the site model.
Intermediate – Normally, you have to use a grade limits with a site modifier, but not when use a pad with retaining edge. In this image you can see a pad with a vertical retaining each. At the bottom you can see the red outline itches the pad, and at the top you can see the red outline which is the retaining edge. Vectorworks will create the retaining edge to sit at exactly the right height for the existing site model if you use the command Send to Surface.
A site model is a way of looking at 3D data (spot levels or contours) in a way that allows you to see complex 3D models and 2D representations. VectorWorks uses the 3D information to create the models based on the data to help you understand the 2D and 3D nature of your site.
First you have to put in 3D data, such as spot levels, contours or surveyor’s file. Then you ask VectorWorks to create a site model from this data. VectorWorks uses a set of algorithms to analyze the information and then creates the 2D and 3D representations. The algorithms can be thought of as a set of mathematical assumptions that are used to calculate the 2D contours and 3D model. Because of these assumptions you may get some odd shaped contours, or 3D models that don’t look as you expected. A Site Model is not reality, it’s a mathematical model of the data you give VectorWorks. Better data – better Site Model.
Creating A Site Model Snapshot – A site model snapshot is a way of keeping a view of the site model. For example, you might want to see the existing site model and the proposed site mode at the same time, you might want to see smoothed contours and shaded contours at the same time.
Editing Site Model Labels – The site model has labels on each major contour which can be edited with the Reshape tool.
Editing The Site Model Crop – The site model crop is a polygon that stretches around the information you have supplied to Vectorworks. The site model crop works a lot like the crop in the viewport. The site model crop can also be edited to filter out information that you do not want to show.
Adding Additional Site Model Data – You might sometimes find that the resulting site model does not have the contours you thought it would have. In this situation, more spot levels along the contours might be useful. When you need to add information to the site model, even after you have made the site model, you can.
Creating the Site Model – A site model is created from 3D loci, 3D polygons or stake objects. You can use any of these types and you can use a combination of these.