M: Attribute table__Overview

Attribute table information is the basis of geographic features, allowing you to visualize, query, and analyze your data. In the simplest terms, tables are made up of rows and columns, and all rows have the same columns. In TYMap, rows are known as records and columns are fields. Each field can store a specific type of data, such as a number or piece of text.

Feature classes are really just tables with special fields that contain information about the geometry of the features. These include the Shape field for point, line, and polygon feature classes and the BLOB field for annotation feature classes. Some fields, such as Shape, are automatically added, populated, and maintained by TYMap.

Note: Changing the attribute table do not affect the original shapefile.

General table properties

• Tables manage attributes. This means they store information. In a geodatabase, tables usually store information about a geographic entity.

• Tables contain rows. Each row is one record. In a spatial table, each row represents one feature.

• All rows in a table have the same columns. Columns are also called fields. They are the categories of information the table contains, such as names, areas or statuses.

• Each field has a data type and a name.

Spatial table properties

(These properties are in addition to the general table properties.)

• Spatial tables have x,y coordinates.

• Spatial tables can have measure m-value and z-coordinates.

• Spatial tables store a specific type of feature—polygon, line, point, dimension, or annotation.

You can define table names, field names, and data types when you use Easy Contour to create tables in a geodatabase.

Open attribute table

  (1) Select the layer and right-click the mouse, click [Attribute table].

 (2) Pop up [Attribute table].

See a feature properties

1. Select a feature, right-click the mouse. Click [Attribute].

2. Pop up the [Selected feature attribute data] dialog. If the contents in the attribute table are

   changed, the contents are also updated in the selected feature attribute data. Likewise, if

   the contents in the selected feature attribute data is changed, the contents in the attribute table will be updated.

Select features

Click the [Select] button. Each selected row in the attribute table displays the attributes of a selected feature in the layer. If the set of features selected in the main window is changed, the selection is also updated in the attribute table. Likewise, if the set of rows selected in the attribute table is changed, the set of features selected in the main window will be updated.

Content entries

Example 1:

Field name: AA     Type: Double     Length: 5     Decimals: 3

(Select 'AA' → Right-Click mouse → Click [Field properties] → Open the [Field properties] dialog)

Number of decimal places will be limited, When we enter data. But number of integer palces can not.

If length of data is more then 'Length'. Will pop-up prompts ,when exporting DBF or Shapefile.

Example 2:

Field name: BB     Type: Int     Length: 3     Decimals: 0

The input is not restricted.

If length of data is more then 'Length'. Will pop-up prompts ,when exporting DBF or Shapefile.

Example 3:

Field name:CC     Type: String     Length: 5     Decimals: 0

The input is restricted.