Executive Summary

The following pages will give you an introduction to MAEviz. First, we will start with a short description of the layout of the program which will help you get familiar with the work environment before you start using MAEviz. We will follow that with a tutorial where you'll be able to run an earthquake risk assessment analysis. The purpose of this tutorial is to help you feel comfortable using the program and to also give you a clear idea of what MAEviz can do. The last part covers a user's guide where you can find a more extensive explanation of MAEviz capabilities that were not covered on the tutorial.

Exercise Overview

MAEviz Overview


When MAEviz is first launched, the welcome screen appears. From the welcome screen, users can select to read an overview of information about MAEviz, follow built-in tutorials, or just begin working in MAEviz (by selecting Workbench which will take you to the main MAEviz screen, also known as the Workbench). See figure above.

Workbench Layout

The MAEviz workbench consists of a number of Views, each containing information about a specific part of MAEviz. Each view is like a sub-window within the MAEviz workbench window, and can be minimized, maximized, moved, or even torn away from the main window into its own window. These interactions are done by clicking the minimize and maximize view icons in the view's title bar, or by clicking and dragging on the view's border or title bar.

See the image below for the most commonly used views in MAEviz.

Scenario View

The Scenario View is where you will find a list of all the data for the scenario or scenarios that you are currently working with. Each scenario that you are working with is listed as a top-level item in this view, which can be expanded by clicking the plus (plus) icon next to its name, to see the details of the scenario. Inside each scenario, you can see a list of the Mappable Data and Scenario Data. All data listed in Mappable Data are the layers of data that appear in your rendered map whereas all the data listed in the Scenario Data includes all non-renderable data for the scenario (e.g. tables).

The Scenario View is also where you would go to do the major operations on your scenarios: adding an earthquake hazard or other data, running damage analyses, etc.

Visualization View

The Visualization Window Views are where the rendered maps of your scenario will appear. Each scenario can have its own rendered 2d and 3d map, so you can see the visualization multiple scenarios simultaneously if desired. It is here that you can get a quick visual overview of the results of your analyses. You can control the camera position by using the mouse, or click the view control buttons in the toolbar.

Data Catalog View

The Catalog View is a list of all the data that is available for you to use in your scenarios. It is organized first by repositories, which are stores of MAEviz data. Repositories can represent local data, or data stored on a remote server. Within each repository, the data is organized by the type of data that it is. To add data to a scenario, you can navigate to and find the data within this view, then drag it into either the Visualization View for your scenario, or onto the scenario's name in the Scenario View. Before data can be made available to your scenario, it must be ingested into a repository and assigned a type. You can find instructions on ingesting building data here.

Style Editor View

The Style Editor is used to adjust the way in which a layer of data is displayed in the Visualization View. If the Style Editor is not visible, you can show it by right clicking a Mappable Data layer in the Scenario View, and selecting Change Layer Style. Once this view is showing, you can adjust the color, shape, opacity, and other display characteristics of the map layer. To apply your style changes, you must click the Apply button ( ) in the view's toolbar.

Other Views

Although these are some of the main views you will use, there are a few other views that are shown at various times while using MAEviz and we'll discuss them below.

Table View

The Table View is used to display tabular data such as the attributes of a set of inventory data or analysis results. The most common way to see this view is by right-clicking a Mappable Data layer in the Scenarios View and selecting Show Attribute Table.

Reports View

By right-clicking on a scenario name in the Scenarios View, and selecting Reports..., you can access the Select Report View. By default there are two report types available for every result based on the metadata for each result type, the Default Summary Report and Default Detail Report. The summary report will provide a summary of results and the detail report will provide explicit detail about each result (e.g. building by building results). To run a report, select the report you wish to run, right-click on it and select the Run Report option. The selected report will be generated and displayed. From that point, you can choose to print or save the report.

Fragility View

If you right-click a fragility dataset from the Catalog View, you can select View Fragility to access the Fragility View. The Fragility View shows a list of fragility types that you can drill down into to select and view a particular fragility curve. When you have found the fragility curve that you want to view, right-click it and select View Fragility Set to view a graph of the fragility curve. See the image below.

MAEviz Tutorial

The tutorial covers the typical steps that will be needed in order to perform an earthquake risk assessment. Here are the steps:

  1. Create a New Scenario
  2. View the Scenario and Add Data
  3. Running an Analysis
  4. Analyzing the Results

Example Scenario

In this demonstration, we will use MAEviz as a specific stakeholder would use the tool. The South Carolina DOT has contracted with your group to perform a seismic risk assessment of the transportation network in Charleston South Carolina. Using recently developed bridge fragility curves, and damage-functionality relationships for bridges, you are to perform an analysis of the approximately 340 bridges in the region. The bridge fragility curves are developed for 9 classes of bridges, which cover over 90 percent of the bridge inventory in Charleston. The Hazard which will be evaluated is a magnitude 7.3 earthquake near Charleston (Summerville).

In the process, we will see how the Emergency Manager will launch the MAEviz application, load the GIS data for Charleston County, and then generate earthquake hazard information based on the scenario he wants to investigate. After he has loaded this base information, he can interactively choose and display information for the specific items he wants to evaluate - the bridges, as well as load fragility information about these particular structures. From there, we will witness an analysis of the impact of the hazard. This analysis will assist the stakeholder in evaluating the impact of the damage to the transportation network and consequently, emergency routes. These factors have important social and economic impacts.

Creating a New Scenario

Viewing the Scenario and Adding Data

At this point, your scenario has been created. You will see your scenario listed in the Scenario View and a blank outline of Charleston County has appeared in the Visualization View. See figure below.

At this point, we will learn how to add data to our scenario, and how to manipulate the Visualization View.

Some visualization controls:

  1. To zoom/pan/etc, use the controls at the top of the Visualization View.
  2. To view a 3d rendered view of the same information, right click the entry for your Scenario, and choose Render in 3D (VTK). This will bring up a second Visualization View that shows the same map, but from a 3d rendered perspective.
  3. After adjusting your view, if you want to restore to the original default view in the Visualization, click the Zoom to full extent button in the toolbar ( )

Running an Analysis

Now that we have a basic map to look at, we will learn how to run an analysis. Analyses in MAEviz consist of any calculation that generate data. For example, generating a deterministic earthquake map based on a moment magnitude and epicenter would be considered one type of analysis. Using that earthquake map as well as bridge inventory data to generate information about bridge damage would be another type of analysis.

In this example, we want to find bridge damage results based on a deterministic earthquake hazard that we will generate.

The last analysis type we will demonstrate for the bridges is the Cost Benefit Analysis. This analysis requires the Pre- and Post-Retrofit Losses, which are the results of previous two steps. Select the appropriate datasets for these fields like (see figure below) and enter a descriptive name such as Charleston Bridges Retrofit Cost-Benefit Ratio. Once the datasets have been selected, you can select the fields we want to compare for the cost benefit. Scroll down and find the repaircost field and click the Add button. The analysis should now be ready to run so click the Execute button.

Analyzing Results

Now that the analyses that we were interested in have been completed, it's time to analyze and try to make sense of the results. There are various ways of viewing and visualizing the results, which we will learn now.

3D Damage Bars

Filtering Data


Decision Support

In this section, we are going to demonstrate the Network-based Seismic Retrofit (NBSR) Analysis, one of the advanced features included in MAEviz. Given a particular budget constraint, MAEviz will recommend a retrofit strategy for the set of bridges to minimize the change in total system travel time (TSTT). Similar to the building decision support, we are going to need more data in order to effectively use the decision support tools. We don't have all of the data for running the Charleston bridges as an example so we are going to switch gears and build a new scenario with Shelby County Tennessee as our region of interest. You will need to follow the previous steps for creating a new scenario with the following changes:

After setting up the region, we will go straight to the NBSR analysis and use it to find our datasets.

Network Loss

This advanced analysis in MAEviz determines the resulting link flow from a damaged network.


Based on this simple bridge damage analysis, we can conclude that the MAEviz tool helps to identify areas of high risk. MAEviz could also have been used to look at some mitigation options that may be beneficial to consider. The Emergency Manager in our example is able to take the information and results from this analysis and evaluate detailed options for specific bridges based on proprietary information in the department's databases and files. Furthermore, probabilistic scenarios can also be evaluated in addition to a deterministic earthquake such as the one we used in this example to provide for a wider range of events instead of one specific event. The analysis could also be expanded to look at other components in the region such as the utility networks, schools (since these typically serve as temporary shelters), hospitals, police stations, etc. Some of these data are available with the default installation of MAEviz and is left as an exercise to the user.

The MAEviz tool provides an environment for visual exploration, analysis and evaluation of engineering options pertinent to investigating bridge and building retrofit options. There are more advanced analyses such as decision support for both bridges and buildings that can help users determine retrofit options and pre- and post-disaster planning. Furthermore, the MAEviz Cyberenvironment provides the ability to collaborate and share results with other MAEviz users.

Please contact the Mid-America Earthquake Center for further information on MAEviz.

Mid-America Earthquake Center
205 N. Mathews Avenue
1240 Newmark Lab
Urbana, IL 61801
Tel: (217) 244-6302 Fax: (217) 333-3821