Database Handling

Populating and managing the database. Creating layers by different methods and importing data is possible at all times. Some of these procedures can also be performed by Operator users.

One important concept when it comes to vectorial data layers in TerraAmazon is the layer´s box. In TerraAmazon, the box of a vectorial data layer is dynamic. It has an initial value attributed to it at the moment of its storage in the database, which can be either at importation or at layer creation. But as new data is added to the layer, the size of the box changes to include it.

That means that in TerraAmazon the box of vectorial data layers does not limit the geographic area where it is possible to store data, since data can be added outside the box, changing its size.

Otherwise, if data was removed from the layer, it is possible to decrease and readjust the layer box through the function Update Box. Decrease the box size helps the drawing process making the fit theme tool correct the visualization area. This is an operation that must be done by the user. There is not any automatic routine to decrease the layer box.

The box of raster layer data is fixed. However, TerraAmazon allows the change of raster layer box in one situation: raster import. For that to be possible, the first raster data of the sequence must be imported as expansible, and then the next ones can be added to that same layer, automatically changing the box after each importation. Find more details on that procedure at Importing Single Raster Data.