![]() Attributes TableWhen this module is activated, it records some information used during the session. So, the next time you use it, the following information is retrieved:
Note: The selected tuples (table lines) will be highlighted on the map only if you press the Draw button. Note: In the new Spring version, the Objects Table is a docking table; that is, it can be floating or docked at the main window.
Selecting and Showing DataUsing this interface the user will be able to choose between examining the attributes of all objects (Show All) or only the ones that satisfy a condition stated by the Query Module (Selected). For instance, the user can use the Query Model to show the attributes of all districts whose population have income greater than 5 minimum wages and then select to see all districts or only the ones that satisfy the query condition.
StatisticsTo see the statistics you have to click with the mouse right button over a selected attribute name. Choose the option Statistics.... The Data Report window is presented and the following statistics parameters are presented:
NOTA: For alphanumeric attributes, only the number of samples and absences will be presented. Inserting color marksTo mark an object over the Table and show its representations on the map, you should click on the tuple number on the left side of the table. It is possible to use up to five different colors. To each mark added to the table, the module paints the tuple with the correspondent color. The color must be chosen beforehand, by pointing the mouse over the color selection button, then choosing and activating the desired color.
NOTE: On the example above each geo-object was highlighted with a different color. You can use the same color to highlight several geo-objects though, putting together groups of geographic objects.
The other way is:
If you repeat the steps above over the marked tuples, you will cancel their marks (there will be an inversion of marks). Another way of canceling the marks would be:
OBS: the first procedure performs a toggle function while the second does not: the tuples are either all selected (marked) or not. When the user wants to select many tuples that are contiguous on the table, this procedure becomes very convenient. Before pressing the shift key the user must go further on the table and only then press the shift key to select other tuples.
This option allows two other ways of removing marks from the Table. Press the first column using the mouse right button, select the option Remove and choose between All colors or Current color.
The selected tuples can be moved to the beginning or end of the table. Press the first column using the mouse right button, select the option Move and then, you will see the following options: All to Begin, All to End, Current to Begin or Current to End.
The marked tuples can be used for zooming the map. Press the first column using the mouse right button, select the option Zoom and choose between All colors or Current color. The first option zooms the map, showing all marked geo-objects, while the second option only presents the portion of the map marked with the current color. GraphicThis module has three types of graphic:
HistogramTo use the histogram option, you must choose a numeric field (attribute or column) on the table. The histogram is presented on the Graphic window and shows the coordinates axis, X being the selected attribute and Y the frequency.
NOTE: To obtain an histogram of another attribute you should repeat the operation above, selecting a new column The following histogram shows the Population attribute, in the city of Brasília. Scatter PlotTo obtain a Scatter Plot, the user must remove all marked lines and select two columns, i.e., marking two attributes.
The figure below shows the Table window with the attributes Area and Population, in the city of Brasília, already selected. The figure below show the Scatter Plot of 'Area x Population” in the city of Brasília: NOTE: Other scatter plots can be obtained by selecting any other numeric attributes available. To remove the highlight from the columns, select them again with the mouse and the toggle function will be performed. Pie ChartTo obtain this kind of graphic the user should mark some tuples (lines) on the Table and the colors will be used to represent the pie "slices".
The next figure shows an example of pie chart (Population attribute).
Exporting Attributes Table
There are 3 format options for exporting the Attributes Table: ASCII bounded, ASCII Spring and SpringWeb. The ASCII bounded format can be used by other software such as Excel. The file is saved as text and the fields are separated by semicolons:
"ID";"NAME";"LABEL";"AREA";"PERIMETER"; The ASCII SPRING format allows exchange of information between SPRING databases. It is a text file with extension _TAB.spr and it describes attributes, separated by semi colons, as showed below: TABLE The SpringWeb format makes the data available through the Internet using SpringWeb. When the table is exported, two files are created: '.map' and '.att ' extensions, SpringWeb standard. Follow the steps below to export a Table:
Collection GenerationThe option File - Collection Generation on the menu of the window "Table:<object>" is used to create a new collection from the objects listed on the table. The window "Collection Generation" is presented and allows to create object collections based on their Attributes or bounding box defined by the zoom cursor. The data on the table can also be restricted because the system allows spatial queries applied over attributes queries and vice-versa. Once the user has selected the objects, he can create collection in three different ways:
Check how to generate a collection from the table. Infolayer GenerationThis option is used to generate Thematic or Cadastral Information Layers from Grouping or Spatial Query performed over geo-objects. Once you have performed a grouping or attributes query over geo-objects, it is possible to transform these procedures in other ILs, associated to the categories Thematic and Cadastral. The Thematic category and its classes might exist or be automatically created by this function. Check how to generate an information layer from a table.
Database Query ![]() |