This is the 26th day of my participation in the August More Text Challenge
Background: Arcmap cannot draw one or more layers when importing data… The number of points is less than the required number of elements. After consulting the data for half a day, we found that it was caused by topological relationship error when making data. Now we record the treatment method in detail as follows:
1. Original data:
After importing the postgres database, the data reported an error as follows, and the data was scattered to half of the original
Reason 2.
Incorrect topology relation during data creation
3. Solutions:
3.1 Checking Errors
Open the toolbox – data management tools – elements – check geometry
Enter the problem data source, and the output table represents where the error message was output
Output the file
Indicates that there is an error in the data
3.2 repair
Open the toolbox – Data management tools – Elements – repair geometry
After the restoration, a message is displayed indicating that the restoration is successful. If a warning message is displayed, you can restore the restoration again
The restored data is shown as follows
Once fixed, we can use tools to import data into the database without error
4. Expand 4.1 Creating a Topology
You must put the data set of the database, right-click the data set to create a topology
A data can only participate in one topology, and a topology can have multiple data. Once a topology check is established, data cannot be modified or deleted
Data must be stored in the data set. If the data is not stored in the data set, the topology cannot be created
4.2 SHP File topology Check
SHP cannot perform topology check directly. You need to import or create a data set. The coordinate system must be consistent. Data must be backed up before topology check
New topology, no overlap, result
Topology modifies data. Data changes
Note: Fix geometry before topology is completed, otherwise invalid. The function is to change the outer polygon to clockwise and the inner polygon to counterclockwise