How to split a vector into equal smaller parts in QGIS or similar?

i want to divide a shapefile with many tiles into a lot of smaller tiles. I am searching for a smart solution, because manual edits are out of questions

Anyone can help or know a nice function?

Answer

Using QGIS you can quickly divide a given shapefile up into regular rectangles as you've shown in your example.

1. Load the original shapefile;


2. Use Vector|Research Tools|Vector grid and create a grid of polygons the same extent as your shapefile, with the right distance between divisions ('parameters') selected (100 in my example image below);


3. Intersect the two layers (Vector|Geoprocessing Tools|Intersect), with the first layer as the original shapefile and the second as your vector grid. The output will be your shapefile chopped up by the boundaries of the vector grid.