Net sub-blocks

The basis for the Extended Block Card (EBK) is the net blocks of the Base Block Card (BBK) of the Office for Geodata and Cadaster. In order to avoid the formation of splinter areas at the EBK, blocks of the BBK with an area of less than 100 m² were added to the neighbouring block with the longest common dividing line. Traffic islands with an area of less than 50 m² have been eliminated. If sub-areas of different types of use occurred within a base block of the BBK with at least 5 000 m², sub-blocks were demarcated. The EBK consists of approximately 15600 partial block surfaces.扩展地块卡片（Extended Block Card，EBK）的编制依据为地理数据与地籍局的基础地块卡片（Base Block Card，BBK）的净地块集合。为避免EBK产生碎块区域，将BBK中面积小于100平方米的地块并入拥有最长公共分界线的相邻地块。已移除面积小于50平方米的交通岛。若BBK的某一基础地块内存在面积不小于5000平方米的多用途子区域，则需划定子地块。本次EBK共包含约15600个局部地块面域。