Visualization Tools

Tools to display and manipulate the both vector and raster data in the drawing area. All visualization tools are effective on the drawing area only.

To use these tools, you must have a layer you wish to visualize or manipulate.

To visualize the data for the first time after connecting to the database, select the layers to be displayed by checking their check boxes.

Click on the tool to visualize it in the drawing area.

The time required by the system to display the data on the drawing area depends on the amount of data selected to be displayed and on how complex such data is. That is so because a layer can have restrictions in order to point only to part of the data, which as a consequence makes the display process concern only the data effectively pointed by the selected layers, instead of on the total amount of data in their respective layers. Also, the time will depend on the area selected to be visualized, that is, selecting the entire layer (using the Fit Layer option, for example) will result in a larger amount of data to be drawn than it would be if a small area would be chosen. For the same reason, visualizing data in a scale of 1:25.000 will be much faster then doing it on 1:100.000, since more data will be visualized.

Information Cursor: queries the geometry´s attributes. Select the tool and on the desired geometry. It has an effect on the geometry of the layer which is active. It also queries rasterīs information such as: bands, pixel values, XY coordinates, line and column positions.

Selection: Select geometries in the visualization area.

Remove selection: remove geometries selection in the visualization area.

Pan cursor. Click and hold on the drawing area, move to the desired direction and release the click.

Zoom extent. Fits the figure in the current window size.

Draw tool. Triggers the data display in the visualization area. The data visualized are determined by the layers which are selected. That means that TerraAmazon will display only the layers whose visualization scale range is within the scale defined to be drawn. Drawing data for the first time will entirely fit all the selected layers in the drawing area. However, the following visualizations will resume the previous one, even after TerraAmazon is closed.

Zoom in. Select the tool and delimit the area to be visualized by holding a click in the visualization area and drawing a rectangle involving the desired area.

Zoom out. Just click anywhere in the drawing area. Multiplies the visualization scale by two.

Previous and Next visualization.