Latitudes and longitudes in the Netherlands

Getting geographical data on Holland is not a trivial matter. It took me a bit of tenacity to get the data. Hence I thought being a good idea to store my findings. I might need these data in the future. The first file that I found on the internet is a file with longitudes/ latitudes of municipalities.. Then nice thing about this file is that municipalities are given with a polygon. It is possible to show the municipalities with their contours on a map. Later, I found another file with six digit postal codes. Each postal code represents about 10 different addresses. This file is stored here.
I use these data to display spatial information in Oracle. In Oracle such data must be stored in a special data type, SDO_Geometry. The import file on municipalities is stored stored here. The import file on postal code is provided here.