I have a shapefile with 1000 polygon data and shapefile includes 50000 unique lines. I want to connect both lines that are inside the polygon. I used the spacialfilter but it couldn't detect properly endpoint of the lines which are inside of the po

Could you post a screenshot or sample data of what you are trying to accomplish?

@dustin​ 

Here is an example of a different situation.

I want to detect those lines which are inside of the polygon like locations 1 and 2, and then snap/connect those lines together.

In the next category I want to detect those lines which have 5 cm distance from the polygons. and snap/connect them inside of the polygons (like location 4)