Arc GIS basic operation 3

Traps of planar objects

1. newly build gbd file
2. Set properties （ choice Face object ）
3. Set the corresponding content options
Specific operation and the first part The creation steps of linear objects are the same

Trap pattern

Under the edit bar Create elements Tab , Select facet , Start tracing . Double click to end
Be careful ： Be sure to make the line closed

Tool is introduced

1.
If you find that your line does not coincide well with what you want , You can use this to insert the folding point , Drag the break point to adjust the status quo .
2.
Crop shaping elements It is to eliminate the cut and segmented graphics , And delete
3.
Crop face tool It is to divide small areas on the basis of large areas , Independent .
Be careful ： It must form a trap pattern with the boundary line , Otherwise, double click to display an error , Redraw point ！！！

Tracking of public side

utilize Tracking tools , To draw coincident edges . But be careful not to appear “ double-fold eyelids ”.

Cut and discard duplicate areas

1. After drawing the boundary of aquifer with broken points , The default large image is on the top . First remove the top layer , Choose One Small contained faceted objects .
2. then withdraw edit . Select shear

3. Check discard intersection

Cut on a large area

Personally think that , Snap sketch In this step , May point , Don't order . You can also go directly to the next step ~~~

In this state , Draw lines normally .

Drawing skills

！ First draw a large area , Then draw a small area
！ When drawing , Be sure to select the drawing object , That is, the outer frame turns blue
！ When drawing large areas , First eliminate unnecessary
！ Reduce the use of tracking
！ Painting layer by layer , Use Snap sketch + shear
!!! Be sure to choose First select the big picture layer **！ Then divide the small layer ！**
ps： If you draw a small layer first , After outlining , Follow up needs to keep tracking the public side , Now , For some reason （ I think it's the intensive reading problem of pixel recognition ）, It is easy to appear that the common edges do not coincide , And you need to select small layer segmentation , Easy to move other painted layers . This is wrong ！ Maybe I couldn't see it at that time , But when it comes to subsequent operations , I want to cry without tears ！！！

Postscript ： There are some things , You don't realize that some steps are so critical , You need to try before you realize the meaning of this step
therefore , When learning new knowledge , Need timely feedback , In this way, one step will not go wrong , Step by step in the wrong
meanwhile , Don't forget , Summarize and record the importance of practice application
To warn yourself （ The future and the present ）