Contents
- 1 How to remove fields from the geodatabase feature table?
- 2 How many feature classes are there in ArcGIS?
- 3 Why are there null values in the attribute table?
- 4 How to replace null values with zeroes in an attribute?
- 5 How to import a geodatabase into a CAD feature?
- 6 What kind of feature classes does a geodatabase support?
How to remove fields from the geodatabase feature table?
ArcGIS does not permit the deletion of standard coverage fields after importing the data set into a geodatabase feature class. These fields can be removed from the feature class attribute table by turning the visibility off and exporting the new feature class.
How many feature classes are there in ArcGIS?
Generally, feature classes are thematic collections of points, lines, or polygons, but there are seven feature class types. The first three are supported in databases and geodatabases.
How to change the alias of a feature class?
The specified alias does not change during the transfer and it is the same in the enterprise geodatabase. Manually change the feature class alias in the enterprise geodatabase after the transfer. For batch processing and automation, consider using the ArcPy AlterAliasName function and iterating through feature classes stored in a workspace.
When to use the feature class alias in ArcGIS?
If an alias is not specified, ArcGIS uses the feature class name as the alias on-the-fly. The Describe ArcPy function can be used to check the alias name of a feature class: If a feature class does not have an assigned alias, desc.aliasName returns a blank field.
Why are there null values in the attribute table?
An attribute table may contain multiple fields with null values and by default, these fields are populated with an empty space. In some cases, some tools or functions do not execute if the fields are not populated with characters (non-nullable fields).
How to replace null values with zeroes in an attribute?
In the Pre-Logic Script Code box, copy and paste the following code: Type the following code in the second box, and replace ‘!Field_Name!’ with the field name from the Fields list, as shown in the image below. updateValue (!Field_Name!) Click OK, and the null values are replaced with zeros in the field, as shown in the image below.
How to replace null values in a field in Python?
Replace the null values in a single field using the Field Calculator and Python parser In ArcMap, click the Editor drop-down menu on the Editor toolbar, and select Start Editing. In the Table Of Contents, right-click the selected layer, and select Open Attribute Table.
How are attribute domains shared in a geodatabase?
Attribute domains can be shared across feature classes, tables, and subtypes in a geodatabase. For example, a feature class for water mains and a feature class that stores water laterals can use the same domain for the ground surface type field. When creating or modifying a domain, you must edit the following properties:
How to import a geodatabase into a CAD feature?
Importing a CAD feature class 114 Importing rasters 115 Copying geodatabase data 121 Loading data into existing simple feature classes and tables 123 Registering ArcSDE layers and tables with the geodatabase 127 Analyzing geodatabase data 128 5 Subtypes and attribute domains 129
What kind of feature classes does a geodatabase support?
The geodatabasesupports a model of topologically integrated feature classes, similar to the coveragemodel. It also extends the coverage model with support for complex networks, relationshipsamong feature classes, and other object-oriented features.