ArcGIS application (XXI) ArcMap method of deleting layer specified features

in the light of Arcmap Delete the problem of specifying conditional elements in vector layers , For one GISer Come on , The first thought should be to use Arcmap Edit tool in . That is, after starting the editing tool , Using the attribute selection tool , Select the element to delete , And then directly Delete Then save the data , This is the most direct and convenient method . Of course, there are many other ways , For example, using AE Program to delete elements , You can customize various functions you need , It can also be used Python library -Gdal Program to delete elements , Such as this one ：python Batch deletion shapefile The specified attribute value of a field in the file _ Air spin basketball blog -CSDN Blog https://soderayer.blog.csdn.net/article/details/123087405. Of course , There are many other software that can achieve this goal .

although Arcmap The editing tool in is the easiest way , This is not a big problem for a small amount of data , But it is a little difficult to deal with a large amount of data . Take a data processed by myself as an example , A point layer vector data , There are hundreds of thousands of points , After starting the editing tool , Being loaded for a long time ,Arcmap For this kind of mass data processing efficiency is very low , Unable to enter the editing state for a long time , Even after entering the editing state, the data processing speed is relatively slow . So for big data , This method is not very desirable , It's too inefficient .

The programming method is very troublesome for some novices just to configure the environment , And if the data is not many , If there is no need for business operation , There is no need to program .

This is for the above problems , We can use Arcmap Use other tools in to delete the specified elements of the layer ：

Method 1： Use Arcgis In your own toolbox Delete Features Tools to achieve rapid deletion .

Tool path ：Data Management Tools->Featurs->Delete Features

  From the help description on the right , We know that this tool can delete all elements in the layer or selected elements . Let's test the effect ：

Open a vector data as follows , There are a large number of point layers in the layer ：

  If you use this tool directly , All the elements in the layer are deleted . We choose some elements that specify conditions , Here's the picture ：

Use here Select Tools Select By Attribute…… The menu selects elements of specific conditions .

Then we use this tool to delete the feature selection operation layer , Click on OK, Look at the results ：

 

  From the results , The selected element is deleted , It's also very fast .

Method 2： Use Arcgis Select the method that the tool saves as new data to obtain the deleted layer data .

The specific process is as follows ：

1. Use Select Tools Select By Attribute…… Menu select the element to be deleted under specific conditions .

2. Right click layer ,Open Attribute Table The menu opens the property sheet .

Use Switch Select Reverse selection of tools , These selected elements are the elements that need to be saved .

 3. Create the selected feature as a new layer , That is, use the right-click menu Selection Medium Create Layer From Seleted Features 

The newly created layer is temporarily stored , We need to save the data as a new layer , As shown in the figure below Data Menu Export Data The tool is saved as new vector data . This also enables the deletion of data specified elements . It's more efficient than Editor Editing tools are faster .

 

  thus , End of this article , I hope that's helpful ！