Urban attractiveness Assessment

1. Background Knowledge

1. Urban System Planning: within a certain region ,......, Determine the distribution and development plans of towns with different population levels and functional division.

2. goals to be achieved in Urban System Planning: Through reasonable economic and social relations between towns in the organizational system, between towns and systems, and between the system and its external environment, use modern system theories and methods to explore the overall benefits of the entire system.

Planning: Relationship between cities and towns in Urban System Planning

Model Method: Urban attractiveness Assessment

2. Gravity Model

Tinbergen (1962) and poyhonen (1963) have extended the field of economics. The individual trade flows between the two economies are proportional to their respective economies (generally expressed in GDP, the distance between them is inversely proportional. The economic scale can also be defined by the quantity of railway transportation, telephone calls, and similar forms of social or economic communication.

3. Simple attractiveness Calculation Formula

Formula: rij is I, j is the economic connection intensity between regions; Pi, PJ is I, j is the population number; GI, gj is I, j is the GDP; dij is I, and J is based on the travel time of the shortest path of the road network.

P and G can use population and GDP, or other factors. In addition, some calculation methods only use population or a single item. The formula is:

4. Urban points Theory

The city attraction theory is used to determine the city attraction scope and the division of urban economic zones. P. D. Converse proposed the attention point theory in 1949 and provided specific calculation methods. This theory defines the attraction between two neighboring cities to reach a balance point as a hit point.

5. Tools

The city attraction evaluation tool is developed using python on the ArcGIS 10 platform. The main tools are as follows:

5.1 urban attractiveness evaluation: Calculate the attractiveness of two cities based on their maximum two indicators, combined with linear distance or shortest path.

5.2 urban attractiveness evaluation Selection: The n most attractive towns around town a are selected.

For the calculation of urban population points in 5.3, see the population metric point calculation formula.

5.4 Connect the primary point to form a fracture ring.