Adding a Dimension to Monitoring Activities
By Harmen van Doorn, Esri Nederland, B.V.
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Innovation in 3D technology has been advancing rapidly. Disaster response experts, city planners, law enforcement officials, architects, tourism professionals, and many others in an increasing number of organizations are beginning to use 3D data for analysis.
One of those organizations is the Scheldestromen Water Board. A public agency, this regional governmental body is charged with managing water quality and making it available in adequate quantities to the 380,000 customers it serves. The water board protects Zeeland, a province in the south of the Netherlands, from flooding by managing 525 kilometers of sea defenses. The water board also ensures that the outlying areas are accessible by managing and maintaining more than 3,900 kilometers of roads.
3D modeling helps the water board get to the heart of a problem and determine the best course of action, which saves time and helps the board reach its safety and quality goals.
GIS contributes significantly to water board operations. It is especially valuable for internal and intra-agency communications. ArcGIS is the standard GIS platform for all water boards in the Netherlands. According to Ignaas Bisdom, a GIS analyst for Scheldestromen Water Board, the board handles many business processes with ArcGIS apps, templates, and dashboards. By using what the ArcGIS Online platform provides and configuring apps, the board has eliminated the need for customization. "The cost reduction realized by using standard tools is enormous, but in this way we will also be able to incorporate new features as they are added to the ArcGIS platform," said Bisdom. 3D imagery, an aspect of the standard capabilities in ArcGIS, can provide further insight and allow decisions to be made more quickly.
3D View of the Seabed
The Meermin III, a survey boat, regularly travels along the coast in Zeeland for the Scheldestromen Water Board. As part of the board's annual monitoring of the flood defenses along the coast, this boat measures the location and height of the defenses from the foreshore. The foreshore, that portion of the seashore that is between the high-water and low-water marks, is often about 200 meters out from the edge of the coast. In the past, measurements of the foreshore were made using tangential measuring points, but now this area is measured by making a 3D scan of the entire surface of the seabed.
Data on the condition of these defenses has been collected for decades so that historical visualizations and analyses can be made. Based on that data, it is possible to determine whether the section of the dyke under the water's surface is holding strong, or whether it has been subject to erosion and should be strengthened.
Seeing the Problem Clearly
A scan of the seabed can be analyzed particularly well by using hydrographic software, but to quickly understand a given situation, the Scheldestromen Water Board creates a visualization of the data using Esri CityEngine and the ArcScene module of the ArcGIS 3D Analyst extension.
To quickly assess the condition of sea defenses, the water board creates visualizations of the data in 3D using Esri CityEngine and the ArcScene module of the ArcGIS 3D Analyst extension.
"Previously, it was difficult to get an overview of the situation. This wasn't very surprising, because figures didn't provide much information and 2D maps are not always suitable. Visualization in 3D provides the viewpoint missing from 2D representations and are more easily understood by people who are not as familiar with maps," explained Jelmer van der Veen, a GIS analyst and applications manager for the Scheldestromen Water Board.
When working for previous employers, Van der Veen had often used 3D technology, so he drew upon this experience in his job with the water board. "I saw 3D visualization as a good option for bringing the foreshore closer, which is normally not visible. For people who are not so used to working with [the] data, this gives a good picture of what is going on."
Reaching Safety and Quality Goals
The water board initially worked with 3D analysis in mid-2014. Raster data was combined with digital elevation model data in Actueel Hoogtebestand Nederland (AHN) format and visualized using ArcScene and CityEngine. The seafront promenade at Vlissingen was the first visualization project. "This was interesting, because the foreshore already dipped very quickly at this point. There was a shear. In the viewer, you can see how the situation was and how it is now," said Van der Veen.
3D modeling helps the board get to the heart of a problem and determine the best course of action. This saves time and also helps the board reach its safety and quality goals. Just as other organizations plan to do more work with 3D in the future, so will the Scheldestromen Water Board.
For further information, contact Harmen van Doorn, communications specialist for Esri Nederland B.V.
This article was provided by Esri Nederland.