Why is There error opening feature class ArcMap?

Why is There error opening feature class ArcMap?

Cause. There is a mismatch between the number of features and the number of records in the DBF file. This can be caused by editing the shapefile DBF table in Microsoft Excel, or by an ArcMap crash while the shapefile is being edited.

How do I fix errors in ArcGIS?

Fixing topology errors

  1. Open the Error Inspector and search for errors, or click the Fix Topology Error tool.
  2. Click the error in the Error Inspector list or use the Fix Topology Error tool to click it on the map.
  3. Right-click the error in the list or on the map and click one of the available fixes.

How do I change the feature class in ArcGIS?


  1. Right-click the feature class or table in the Catalog pane.
  2. Click Properties.
  3. Click the Source tab.
  4. Click the Alias property to enable editing of the name.
  5. Type an alias and click OK to set the alias for that feature class or table.

How do you fix the number of shapes does not match table records?

Solution or Workaround

  1. Open the DBF file.
  2. Delete the last record.
  3. Save and close the DBF file.
  4. Load the shapefile into view.
  5. Download the Shapefile Repair Tool. Run the tool on the damaged shapefile.
  6. Use the ArcInfo Workstation SHAPEARC command: Run the SHAPEARC command on the shapefile.

What does the red exclamation mark mean in ArcMap?

The red exclamation point next to each layer indicates that the link to the data source is broken. The data source can be broken if its references in a geodatabase have been moved, renamed, or deleted, or if they’re inaccessible for some other reason such as the inability to access a folder due to permissions.

How do you repair a shapefile?


  1. Use the Check Geometry tool in ArcToolbox > Data Management Tools > Features.
  2. Run the Repair Geometry tool in ArcToolbox > Data Management Tools > Features.
  3. Export the data to a geodatabase, and copy it back to a new shapefile.
  4. If the data is on a network drive, copy it to a local drive.

How do I open the error inspector in ArcGIS?

  1. Click Error Inspector. on the Topology toolbar.
  2. You can use the Error Inspector window to find errors and exceptions. To find errors for all rules. Click the Show drop-down arrow, and click Errors from all rules. To find errors for a particular topology rule.
  3. Click Search Now.

What are the errors in GIS?

Positional error is often of great concern in GIS, but error can actually affect many different characteristics of the information stored in a database.

  • 3.1. Positional accuracy and precision.
  • 3.2. Attribute accuracy and precision.
  • 3.3. Conceptual accuracy and precision.
  • 3.4 Logical accuracy and precision.

What is feature class in ArcGIS?

In ArcGIS, feature classes are homogeneous collections of features with a common spatial representation and set of attributes stored in a database table, for example, a line feature class for representing road centerlines.

How do I fix the red exclamation mark in ArcMap?

Click the red exclamation point next to the layer to open the Change Data Source dialog box and browse to the correct source. Click the red exclamation point to change the data source. This will update the data source for all layers referencing the same broken source.

How do I create a PRJ file in Arcmap?

If you don’t have access to the Projection Utility, you can create a . prj file manually using a text editor such as Notepad….To use this tool:

  1. Click Start > Programs > Esri > ArcView GIS 3.2 > Projection Utility.
  2. Click Browse and select one or more shapefiles.
  3. Click Next.
  4. Select creation of . prj files.

How do I check my topology?

Using ArcGIS to check topology

  1. Right click on the geodatabase and choose New > Feature Dataset.
  2. Name the dataset ISO_topology (e.g. usa_topology). Click Next.
  3. Select the Geographic Coordinate System > World > WGS 1984. Click Next.
  4. For the vertical coordinate systems, leave as . Click Next. Click Finish.

What are topological errors in GIS?

Topological errors violate the topological relationships either required by a GIS package or defined by the user. (a) An unclosed polygon, (b) a gap between two polygons, and (c) overlapped polygons. An overshoot (left) and an undershoot (right). Both types of errors result in dangling nodes.

What are errors in spatial data?

The most common errors with Spatial Data Submissions are related to various inconsistencies between the spatial data and other submissions (final report text and illustrations, site forms, survey plans, etc.), including the depiction of development areas and surveyed areas, the enumeration of subsurface inspections.

What are the causes of error in map reading?

Errors are also introduced when second- and third-generation data is produced, say, by scanning or digitizing a paper map. In general, there are three sources of error in measurement: human beings, the environment in which they work, and the measurement instruments they use.

What is feature class in ArcMap?

Feature classes are homogeneous collections of common features, each having the same spatial representation (such as points, lines, or polygons) and a common set of attributes (for example, a line feature class for representing road centerlines).

What is the difference between shapefile and feature class?

Shapefiles are a type of feature class. A feature class is a collection of common features that share geometry, attribute fields and in GIS, a spatial reference.

Why is my feature class not opening in ArcGIS?

Error opening feature class. General Function Failure In ArcGIS 8.x, this can occur due to known issues with renaming the feature class name. The following methods may corrupt the feature class name and table: 1. Selecting the name and modifying it. 2. Right-clicking on the name and selecting Modify in ArcCatalog.

Why can’t I add feature classes to an ArcInfo coverage?

This error is returned when trying to add feature classes from an ArcInfo coverage: There is at least one item or redefined item in one of the coverage feature attribute tables that is supported in INFO only, not in Arc. Locate the unsupported items in Workstation ArcInfo.

What does open failed mean in ArcGIS?

Error: Open Failed. Error opening feature class. General Function Failure In ArcGIS 8.x, this can occur due to known issues with renaming the feature class name. The following methods may corrupt the feature class name and table:

How do I close ArcMap and ArcCatalog in ESRI?

Esri cannot guarantee results from incorrect modifications while following these instructions; therefore, use caution and proceed at your own risk. Close ArcMap and ArcCatalog. Open the Command Prompt window: Start > Programs > Command Prompt.