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Introduction Decision Support
System (DSS)

Detailed information about water lines

This page provide some additional information about the main features of the interface, as well as some practical examples of its application. It's also mentioned the technological basis on which this solution is based.


Figure 1

Figure 1 - Appearance of the web interface that makes possible to see detailed information about the water lines.

1 - Identification of the water line shown on the interface.
2 - Mini-map: the scale presentation.
3 - Buttons to increase/decrease the viewing scale.
4 - Legend (to show/hide the themes, simply tick the associated box).
5 - Scale.
6 - Map orientation, showing the North.
7 - Main area of the map, where are represented the water line and the respective hydraulic structures or themes.
8 - Lateral bars that allows to move the displaying area (in four directions: up, down, left and right).


Basically the use of this interface can be summed up to the following: from an initial map the user selects the desired water line and then become available to the client some navigation tools and an interactive legend that allows to enable/disable the displayed themes. Is also possible to see all the alphanumeric information associated with each of the entities and check some photographs, if they are available.

The viewing area (delimited by the four blue sidebars) can be modified using the scale buttons and through the pan functions. To change the viewing scale, just use the two buttons identified in the Figure 1 with the number (3). The magnifying glass with the "+" sign allows to zoom in, while the magnifying glass with the "-" sign allows to zoom out. To move the displayed area, just click with the mouse in one of four lateral bars of the main window (north, east, south and west). The overview map can also be used to apply the translation. Simply click with the mouse's left button on the blue rectangle that identifies the visible area, and drag it over the area you wish to view.

Whenever the viewing scale is changed and/or a translation is applied on the main map, the mini-map is updated to indicate the visible area to the user.

Figure 2

Figure 2 - The overview map.

The checkboxes of the legend's section allows to show/hide the orphotomaps that appears on the map as a background as well as define which themes are to display. To change the visible themes on the map: the user must assign the "visible/active" feature to the theme you want to display/activate. This action is performed with a simple mouse click on the rectangular box associated with the desired theme.

Figure 3

Figure 3 - List of themes and their symbols used in the legend.

Most of the objects represented on the map has associated information. To access this information simply click with the left mouse button on its icon.

Figure 4

Figure 4 - Show information about the hydraulic structure (a bridge).

By clicking on one of these icons is shown a window as illustrated in the following image where it's possible to see different information about the selected structure. From this window it's possible to know for example, the dimensions of the selected structure, the location and purpose as well as the level of interference or even see some photographs, if there are records of them.

Figure 5

Figure 5 - Detailed information relating to a structure (a bridge).

In the case of the structure has associated photos, they shall be consulted using the available links on the top of the window, beneath the identification code of the structure.

Figure 6

Figure 6 - Pictures of a specific structure (in this case, a bridge).


This web interface is based on a Web Server (eg, Apache), a Database Server (eg, MySQL), the PHP programming language and on SVG.

Apache Server MySQL PHP SVG

On the "client machine" side, the following requirements are recommended:

- Browser: Internet Explorer 6 or above (compatibility with other web browsers is currently not guaranteed).
- Browser configuration: plug-in Adobe SVG Viewer installed.
- Browser configuration: JavaScript enabled.
- Browser configuration: pop-up blocker disabled.


The functionality of this interface is guaranteed thanks to the prior execution of a field research in order to obtain detailed information about each the hydraulic structure which may include potential interference with the river flow. Once all the information is gathered, it's treated and stored in the Database, making it available for consultation via this web interface. The information update should be performed with appropriate database management tools.


Figure 7

Figure 7 - Example with orthophotomaps turned off.

Figure 8

Figure 8 - Detailed information about a dam.


Prof. Doutor José Manuel Pereira Vieira

Prof. Doutor José Luís da Silva Pinho

Eng. José Araújo

Eng. Rui Pinho

Dra. Andrea Ribeiro

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