Is there a way to convert the json into vector file(geojson or shapefile)?

[KenKenhehe]

After step2 a image and a json file of the 2D is genenrated, but they are in the format of list of line segments, is there an easy way to convert them into polygon? i.e, la list of points with correct order

[HeavenswordG]

Thank you for your comments, there is no direct way to convert json to vector file. An easy way is to write a program to convert .json file into .shp file with polygon objects, GDAL package will be a good solution to achieve this from Python environment.