According to the above data, we map fifth bitmaps of
spatial distribution of stock of transportation infrastructure for
China's 31 provinces by Geoda095i (one kind of spatial
econometrics software), see Figure 2 and 3. It can be seen that
geographic distribution of transportation infrastructure showed
great differences in China in 2002 and a significant gradient
from the eastern, to the central, and then to the western region
that is the stock of transportation infrastructure in the eastern
region was significantly higher than the stock in the central
region, and the stock of transportation infrastructure in the
central region was significantly higher than the stock in the
western region. In 2006, the fifth bitmap on geographical
distribution of transportation infrastructure also showed a
similar gradient from the eastern to the central, and then to the western region in 2002. By comparing Figure 2 and Figure 3, it
can also be found that China's transportation infrastructure has
a trend of further concentration to the provinces in coastal and
central regions.