Sorting out problems related to ArcMap join table

Form connection is one of our daily tasks ArcGIS A common operation , Commonly used Excel Table connection , But in practice , We will have some problems , This is generally related to the data we use and related operations . ad locum , Based on our practical experience , Summarize some common problems and solutions

1. The table cannot be connected

solve ： Check whether the table has common fields with the connected object , If there is no , You need to create a new public field .

2. After table connection , Only the header is reserved for connecting data , The specific value is blank

solve ：① take Excel Save as dbase Table Format , Reconnect

3. After table connection , Only the header is reserved for connecting data , The specific value is null

solve ：① Check whether the corresponding names of the table data and the original data are completely consistent （ The common situation is the data in different time periods , for example , Due to the adjustment of administrative divisions , A county is now named a city , Cannot match ）, It needs to be modified manually .

         ② Check whether there is a space before the name , You need to delete the space . Sometimes , When we check the table data , It is found that its name is consistent with the original data , But it can't connect normally , At this time, it is necessary to check whether it contains spaces , Such as “ Shanxi Province “ and ” Shanxi Province “ Connection matching cannot be performed .

         ③ Check whether the case is consistent , Such as Beijing and beijing Can't match

         ④ Check whether the field name in the table is Microsoft Access Reserved words

         ⑤ Check whether it is stored in a non personal geographic database Microsoft Access in

         ⑥ Check whether the name or field of the table or feature class contains special characters

4. When the connection , Pop-up dialog box ： No classes registered

solve ： Common in higher versions Excel file , We need to save this form as 97-2003 The format is just

attach ：ESRI Official help files

Archived ArcMap help —ArcMap | file (arcgis.com)