CN111401714A - Urban area reference density partitioning method - Google Patents
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Abstract
The invention relates to a method for dividing urban area reference density, which comprises the following steps: taking the current situation of an urban master gauge or an urban control gauge and a planning vector diagram as an evaluation base diagram, and calculating the volume ratio of the current situation plot; obtaining evaluation results of each planning plot by inputting density partition influence factors and weights; correcting the evaluation result of the planned plot according to the different plot areas; then inputting scientific prediction values of the total planned building area of the five major land types of the urban area general rule according to a formula to obtain the plot volume ratio of the planned plots; planning the total building area according to five types of land in the planning land plot volume rate statistics control gauge unit, thereby obtaining the final planning volume rate of each control gauge unit; and converting the numerical value interval of the final planned volume fraction into different grades of land use intensity subareas to obtain the urban area reference density subarea. The method can ensure the scientificity of the plot volume ratio formulation, can meet the rigid control of the unit level of the control gauge and can meet the scientific conduction of the total amount of the general macro planning building downwards.
Description
Technical Field
The invention relates to an urban area reference density partitioning method, and belongs to the technical field of urban planning.
Background
The density partition is a technical scheme for carrying out total planning and total distribution of the building area from urban area overall planning to controlled detailed planning. The distribution method realizes the conduction process from the general planning to the detailed control planning in a certain administrative unit (or a control and regulation unit) in a quantitative mode, and the core content of the distribution method is the scientific establishment of the plot volume rate and the volume rate subarea.
The total planned building area of most urban control detailed planning in China is greatly different from the total planned building area of urban overall planning, and far exceeds the total planned building area of urban overall planning, which indicates that the urban development scale is seriously out of control, and also indicates that the urban planning has the following two serious problems, namely: the urban overall planning cannot well predict the future development trend and development scale of the city; and secondly, the responsibility of distribution and conduction of planning quantity of the control detailed planning is not well carried out in the urban overall planning. The second problem is caused by the lack of scientific planning method and serious planning management execution capability of the city.
It can be said that the lack of a scientific organization method for density partitioning is one of the main reasons that the scale of a city is out of control, the disordered development of the city and the environmental quality of the city space are difficult to improve and promote.
The existing density partition reference model technology selects influence factors such as location, traffic, service, environment and the like to establish a density partition reference model, but has technical defects.
Firstly, some blocks are not refined enough by taking the blocks as units, and the depth of planning volume rate of the blocks is not reached;
secondly, the total planned building area of the master plan is firstly distributed to the streets and then distributed to the plots. The distribution sequence cannot accurately, directly, scientifically and reasonably obtain the plot planning volume rate, and is scientific in technical operation;
thirdly, the processing method of the density subareas of the residential and commercial service facility land for the final division of some cities is a spatial clustering method, which is tedious, inaccurate, not simple, direct and accurate;
these problems result in the difficulty of having practical and scientific properties after the density partition is done.
Although the density partition method in China is mature and common at present, the method still has certain uncertainty and randomness, and is lack of a scientific method capable of rapidly and accurately calculating.
In a thesis of ' research on a total amount control model based on density zoning and economic analysis, taking the central city of Tianjin City as an example ' (improvement on urban and rural governance and planning-2014-Chinese urban planning annual meeting discourse set (06 urban design and detailed planning) ' -2014), a density zoning reference model is established by adopting influence factors such as selected zones, traffic, service, environment and the like, a correction model is established by introducing correction factors such as historical cultural landscape, ecology, safety and the like, and a density distribution expansion model on a land parcel level is established through total amount distribution. The disadvantages of this method are as follows:
(1) according to the modified density partition model, a spatial clustering method is adopted, GIS software is used for density partition of residential land, the form of the density partition has more uncertainty, and the problem of scientific distribution of the total planned building area of the overall planning cannot be solved rationally.
(2) It is not indicated that the density partition should be scientifically counted and defined within the boundary of a certain administrative unit or a control and regulation unit, and there is an influence of the size of the threshold value of the density interval on the planning management.
(3) For the needs and considerations of all aspects, the high limit requirement of the subareas is broken through in the aspect of development intensity, and the total amount of the macroscopically planned buildings predicted by the master rule cannot be guaranteed to be in a controllable state.
(4) The volume ratio correction sequence is: and (4) reference model evaluation result-volume ratio correction, namely, the predicted total building amount is distributed to the land blocks in the reference model evaluation result to obtain the volume ratio of the land blocks, and the volume ratio of the land blocks is corrected. It cannot be determined whether the total amount of buildings resulting from multiplying the corrected volume rate by the plot is equal to the predicted total amount of buildings.
The 'automatic partition method for urban volume ratio' (No. CN103336894B) disclosed in Chinese patent publication utilizes an information processing system with a high-performance computer as a core, takes geographic data of urban areas as model input data, takes urban blocks as a model processing evaluation base map, establishes an urban volume ratio evaluation model, carries out standardized correction through a salt method, determines the volume ratio value of each block through superposition assignment, and automatically outputs engineering drawings which can be directly used for urban overall planning through drawing equipment. The disadvantages of this method are as follows:
(1) the city blocks are taken as models, the evaluation base map is not fine enough, and scientific volume ratio making is difficult to be carried out on plots with different land properties.
(2) And by using volume fraction values corresponding to different superposition values which are input into the workstation in advance and determined by expert scoring, the macro-controllability of the total planned building quantity predicted by the master rule cannot be ensured by the various land volume fraction values given by the expert scoring.
In summary, the determination of the current domestic standard density partition method has the following main problems:
1. the density partition is refined by taking a block as a processing unit defect: the density partitioning method using blocks as processing units is not microscopic enough. If the planned volume fraction cannot be generated scientifically within the plot, the scientificity of the plot planned volume fraction will be questioned and have uncertainty.
2. Rigidity control of the missing gauge unit level: the plot planning volume rate value can only be a fixed number, and the planning flexibility is lacked, so that the real operability of the density partition is influenced.
3. The spatial clustering method is improperly used, and the planning rationality of density partitioning is weakened.
4. After the plot volume ratio is corrected, the reckoning and the adjustment of the predicted total building amount are lacked, and the scientificity and the accuracy of the plot volume ratio formulation are difficult to guarantee.
Disclosure of Invention
The invention aims to provide an urban area reference density partition method capable of ensuring the scientificity and accuracy of land plot volume ratio formulation.
In order to solve the technical problem, the urban area reference density partitioning method comprises the following steps:
step one, obtaining the land areas for the current plots and the planning plots in five types of land according to the current vector diagram and the planning vector diagram of the urban area; obtaining reference land price vector data according to the reference land price map; obtaining vector data of infrastructure elements according to the planning diagram;
step two, obtaining a current building base and the number of building layers according to a current building multivariate information map of an urban area, and obtaining the volume ratio of each current land according to the total building area of each current land and the land area of the corresponding current land obtained in the step one;
assigning values to the planned plots according to the mutual geographical position relationship between the planned plots and various influence factors, giving weights corresponding to the influence factors, and accordingly obtaining the evaluation result values of the influence factors of the planned plots, wherein the evaluation result values of the influence factors of the planned plots are ∑ values of the various influence factors and × weights of the various influence factors, and further obtaining the evaluation and correction results of the influence factors according to the conversion coefficients of the evaluation results, namely the corrected theoretical volume rate, and the evaluation and correction results of the influence factors are × evaluation result conversion coefficients;
planning the current building area in the boundary line of the historical block by the total building area in the five types of land areas for planning, and distributing the corrected theoretical volume rate into other planning blocks outside the historical block according to the proportion of the corrected theoretical volume rate obtained in the step three, so as to obtain the first round of planning block volume rate of the five types of land;
comparing the first round of planned plot volume ratio of each planned plot of the five types of land obtained in the fourth step with the current plot volume ratio result of the five types of land obtained in the second step, finding out the part of the planned plot, of which the current plot volume ratio is higher than that of the first round, of the planned plot, and planning the current building area A in the five types of land area predicted by the general rule to the current building area B in the historical block, the current building area D on the plot, of which the current plot volume ratio is higher than that of the first round of planned plot volume ratio, the planned building area E of the planned plot and the building area F built in nearly thirty years to obtain the final planned building area G; planning the land occupation area of the five types of land, taking the land occupation area with the current situation land occupation area higher than the actual planning land occupation area, the remaining land occupation area after giving out the land occupation area and building occupation area built in nearly thirty years as the actual planning land occupation area G, and distributing the final planning building area G in the actual planning land occupation area G according to the same method as the step four to obtain the actual planning land occupation area of all planning land occupation areas in the actual planning land occupation area G of the five types of land;
step six, sleeving a control gauge unit boundary line on the control gauge planning graph, performing statistical summation on the building area of each planning land block in the control gauge unit boundary line, and calculating to obtain the total building area Q of five types of land planning in the control gauge unit: setting total K planning land blocks in each gauge control unit, wherein the total planning building area of five types of land in each gauge control unit is QkR、QkA、QkB、QkM、QkW(ii) a Aiming at M-type industrial land in a control gauge unit, wherein the building area in each planning land is q1、q2、qi、……、qkThe land area of each planned land parcel is A'1、A′2、……、A′i、……A′kEach planned plot volume fraction is r'1、r′2、r′i、......、r′kAnd then:
q1＝r′1×A′1，q2＝r′2×A′2，qi＝r′i×A′i，……，qk＝r′k×A′k
QkM＝q1+q2+qi+……+qk；
by analogy, the total planned building area Q of other four types of land in each gauge control unit can be calculatedkR、QkA、QkB、QkW(ii) a Setting the total building area of five types of land planning in the control rule unit as Q, then:
Q＝QkR+QkA+QkB+QkM+QkW
step seven, calculating to obtain the final planned volume rate of each control gauge unit according to the total planned land area of each control gauge unit and the total building area of the five types of land plans in the control gauge units obtained in the step six; setting the total planning land area of each gauge control unit as DKWherein the areas of the K planning plots are respectively
The final planning volume rate of the gauge control unit is FARKAnd then:
and step eight, converting the numerical range of the final planning volume rate of the five types of land in the control gauge unit into different grades of land use intensity partitions to obtain the urban area reference density partition.
In the first step, the current situation vector diagram is a map or a control rule current situation diagram for the current situation construction of the urban area in the previous year; the planning vector diagram is a general urban area planning diagram or a detailed urban area control planning diagram.
In the third step, the influence factors comprise the reference land price zone and the distance and the range from the subway station, the public service center, the park green land and river, the expressway, the primary and secondary trunk roads, the branch road, the railway and the airport, and the closer the reference land price zone, the distance from the subway station, the public service center, the park green land and river, the expressway, the primary and secondary trunk roads, the branch road, the railway and the airport, the larger the value assignment.
In the third step, when the area of the planned plot is less than or equal to 10000 meters, the conversion coefficient is set to be 1.05-1.15; when the area of the planned plot is 10000-30000 meters, the conversion coefficient is set to be 0.95-1.05; when the area of the planned plot is 30000-40000 m, the conversion coefficient is set to be 0.85-0.95; when the area of the planned plot is larger than or equal to 40000 m, the conversion coefficient is set to be 0.75-0.85.
In the fourth step, the modified theoretical volume fraction obtained in the third step is distributed into the rest planning plots outside the historical block, so that the first round planning plot volume fraction of the five major plots is obtained by the following method:
setting the corrected theoretical volume rate of each planning plot as k for any planning plot with area of T1、k2、……ki、……、knThe land area of each planning plot is A1、A2、……Ai、……、An(ii) a Calculating to obtain a multiple b of the plot volume ratio of the planned plot relative to the corrected theoretical volume ratio according to the formula (1);
further obtaining the first round planning plot volume ratio r of each planning plot1、r2、……ri、……、rn：
r1＝b×k1
r2＝b×k2
……
ri＝b×ki
……
rn＝b×kn；
And by analogy, the first round of planned plot volume rate of each planned plot of the five types of land is obtained.
In the fifth step, the calculation method of the volume ratio of the actual planned plots in the area g for actual planning of the five types of land is as follows: for any one of the areas as TsThe theoretical volume rate of each planning plot after being corrected is respectively set as ks1、ks2、……ksi、……、ksmThe land area of each planning plot is As1、As2、……Asi、……、Asm(ii) a Calculating to obtain the multiple b of the volume ratio of the actual planned plot relative to the corrected theoretical volume ratio according to the formula (2)s；
Further obtaining the actual planned plot volume ratio r of each planned plots1、rs2、……rsi、……、rsm：
rs1＝bs×ks1
rs2＝bs×ks2
……
rsi＝bs×ksi
……
rsm＝bs×ksm；
And by analogy, the actual planned plot volume rate of each planned plot of the five types of land is obtained.
Has the advantages that:
compared with the document 1, a total amount control model research based on density partition and economic analysis, which takes the urban area of Tianjin city as an example;
(1) original citation- "according to the corrected density partition model, adopting a spatial clustering method, and utilizing GIS software to perform spatial clustering on the residential area, and dividing the residential area into four density partitions". Because the spatial clustering method causes more uncertainty in the form of the density partition, the problem of scientific distribution of the total planned building area of the overall planning cannot be solved rationally.
According to the invention, the volume ratio of the control gauge unit is calculated by adopting a method for counting the building quantity of the control gauge unit, and the scientific density partition reflecting the accurate quantity relation on the control gauge unit level can be obtained.
(2) Original citation-control ranges of the density zones are reflected between threshold intervals of the density zones, the intervals are too large and are not beneficial to planning management, and planning flexible control is weakened due to too small intervals, so that the establishment of a reasonable zone threshold is one of the keys of the density zones. "
The inventor thinks that the threshold interval of the density partition is the result of scientific calculation according to the boundary line of the control and regulation unit, so that the influence of the threshold size of the density interval on the planning management does not exist. It is worth pointing out that such false recognition is due to the fact that there is no indication that the density partition should be scientifically counted and defined within the boundary of a certain administrative unit or control rule unit. According to the method, firstly, the density partition influence factors and the weight are determined, then the total planned building area of various total planned land sites is scientifically predicted, so that each land block has scientific volume rate, and the volume rate scientifically distributed by the gauge control units, so that the density partitions in the range of the gauge control units are scientifically determined.
(3) The original text quote- "reformulation system has exception, such as the project of the guarantee house living in the middle and low income group, for the needs and consideration of all aspects, the high limit requirement of the subarea can be broken through in the development intensity aspect, the project for guaranteeing the civil life can be made into the overall consideration of the development intensity when the concrete project is executed, and the requirement of the subarea can be properly broken through. "
The inventor believes that, no matter how the policy changes, the purpose of scientifically formulating the density partition should be ensured, namely, the volume rate of the planned land parcel can be finely adjusted within the unit boundary of the control gauge, but the volume rate planned at the unit level of the control gauge should be rigidly controllable, so that the total macroscopically planned building amount predicted by the master gauge can be ensured to be in a controllable state.
The sequence of the fourth, fifth, sixth and seventh steps of the invention determines the scientificity of the density partition reference method, namely, the total amount of the building planned by the master plan is firstly spread to the land parcel and then counted to the upper, lower and middle sequence of the control plan unit, thereby ensuring that the total amount of the building planned by the macro plan is not broken through, the mesoscopic rigidity is controllable and the microcosmic future is adjustable
(4) The original text quotes-volume rate conversion is based on the research of plot scale and the internal rule of the volume rate, the plot is divided into four sections according to the analog function of the volume rate and the plot size for conversion, and the conversion coefficient of the volume rate is comprehensively formulated according to the number of the planning roads adjacent to the plot. "
It is clear that the volume ratio correction sequence here is: and (3) reference model evaluation result-volume ratio correction, namely, the predicted total building amount is distributed to the land blocks in the reference model evaluation result to obtain the volume ratio of the land blocks, and the volume ratio of the land blocks is corrected. This step obviously has the problem that is the product of the corrected volume fraction and the plot the total amount of buildings is equal to the predicted total amount of buildings? This requires re-certification and adjustment.
The sequence of the invention is as follows: the method comprises the steps of reference model evaluation result-evaluation result correction-volume ratio, namely after the reference model evaluation result, firstly correcting a land block according to the land block area size, and then distributing the predicted total building amount to the correction result to obtain the land block volume ratio. Through the adjustment of the sequence, the predicted total building amount can be ensured to be distributed to the land parcels at one time without re-approval and adjustment.
The patent of the invention relates to an automatic urban volume ratio partitioning method, which is invented by the national intellectual property office of the people's republic of China in the document 1, and has an authorization notice number CN 103336894B. "compare:
(1) original citation, namely processing and evaluating base maps by taking city blocks as models, is not fine enough, and the scientific volume rate is difficult to make for plots with different land properties.
The invention takes the land parcel as an evaluation processing unit to directly obtain the scientific volume rate of the land parcel.
(2) Original citation- "volume rate values for different stacked values determined using expert scoring previously entered into the workstation, as shown in the following table: "
Here, the various land occupation volume values given by expert scoring cannot guarantee that the total planned building amount predicted by the master rule is macroscopically controllable.
The invention directly inputs the total planned building amount predicted by the master gauge, and ensures the scientific conduction process of the master gauge.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a diagram of the alignment process in the flowchart of the present invention;
FIG. 3 is a graph showing the evaluation results of the influence factors;
FIG. 4 is a correction chart of the evaluation result of the influence factor;
FIG. 5 is a plot of planned plot volume rate;
FIG. 6 is a diagram of total amount of area of five types of land planned by a control gauge unit level;
FIG. 7 is a plot of plot of land planning for five major categories at the level of the gauge control unit;
fig. 8 is a reference density partition map.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be purely exemplary and are not intended to limit the scope of the invention, as various equivalent modifications of the invention will occur to those skilled in the art upon reading the present disclosure and fall within the scope of the appended claims.
The technical noun explains:
current land area for land: the occupied land comprises a plurality of current land blocks;
planning the land area for the land parcel: the planning land comprises a plurality of planning plots;
current plot volume fraction: the volume fraction of each current plot;
first round planned plot volume rate: only removing building areas in blocks of the historical block and then allocating the building areas to obtain the volume ratio of each planning block;
and (3) finally planning the plot volume rate: and (3) planning building areas in blocks of the historical block, building areas in blocks with the current block volume rate higher than the first round planning block volume rate, building areas in blocks which have been allowed to be built, building areas of buildings which are built in 1990, and then re-allocating the building areas to other blocks to obtain the volume rates of other planning blocks.
The technical scheme of the invention is explained in detail by combining the urban area range density partitioning method case of the old center of the Changchun city.
As shown in fig. 1 and fig. 2, the urban (town) reference density partitioning method of the present invention includes the following steps:
converting a map for current situation construction of the urban areas of the old central cities of Changchun city in the CAD format into a GIS format and using the GIS format as a current situation vector diagram, and converting a city central city control planning map of the old central cities of Changchun city in the CAD format into a GIS format and using the GIS format as a planning vector diagram; installing a version of ArcGIS more than 10.3 on a high-performance computer, inputting a current vector diagram and a planning vector diagram in a workstation, and processing in the ArcGIS to obtain the area for the current land parcel and the area for the planning land parcel in five types of land parcels; scanning the reference land price map of the old central urban area of the Changchun city by an external high-resolution scanner and other equipment, and processing in ArcGIS to obtain reference land price vector data; inputting the city general planning map or the related legal planning map into a workstation, and processing in ArcGIS to obtain vector data of city subway stations, public service centers, park greenbelts and rivers, expressways, primary and secondary trunks, branches, roads, railways, airports and control and regulation unit boundaries;
the five types of land are residential land, public management and public service facility land, commercial service facility land, industrial land and logistics storage land in the urban land classification and planning and construction land standard GB 50137-2011.
Inputting the multi-element information map of the current building in the city and the old center of Changchun city into a workstation, and processing the information map in ArcGIS to obtain a current building base and the number of building layers in the city and the old center of Changchun city; calculating the total building area of each current situation plot in the urban area of the old center of Changchun city by using ArcGIS software; and (4) dividing the total building area of each current plot by the land area of the corresponding current plot obtained in the step one to obtain the volume ratio of each current plot.
The method comprises the steps of firstly, obtaining a planning land block, secondly, obtaining a planning land block, thirdly, assigning values according to geographical positions of the planning land block, such as distances and ranges of different reference land price regions, distance subway stations, public service centers, park greenbelts and rivers, express ways, main and secondary trunk roads, branches, roads, railways, airports and the like, wherein the more optimal geographic position assignment is larger, then, giving weights corresponding to all influence factors according to empirical values to obtain five types of land density subarea evaluation index tables, wherein the table 1 is a density subarea evaluation index table of urban areas of old centers of Changchun city, the table 2 is a density subarea evaluation index table of public management and public service facilities of urban areas of old centers of Changchun city, the table 3 is a density subarea evaluation index table of commercial service facilities of urban areas of old centers of Changchun city, the table 4 is a density subarea evaluation index table of urban areas of industrial and logistics storage areas of Changchun city, the data in the five types of density subarea evaluation index tables are respectively input into a workstation, the planning land block is used as a data processing unit, the planning land block is superposed to obtain influence factor result, the influence factor result is a theoretical correction factor correction result, the theoretical correction result, the influence factor correction result is obtained by adding the planning land block, and the theoretical correction factor correction, the theoretical correction factor correction result is the theoretical correction of the theoretical correction factor correction, and the theoretical correction of the influence factor correction, the theoretical correction of the influence factor correction of the theoretical correction of the influence factor correction, the theoretical correction of the influence factor correction of the theoretical correction of the influence factor correction of the theoretical correction.
TABLE 1
TABLE 2
TABLE 3
TABLE 4
TABLE 5
| (Rice) | Conversion coefficient |
| ≤10000 | 1.1 |
| 10000-30000 | 1.0 |
| 30000-40000 | 0.95 |
| ≥40000 | 0.85 |
Inputting the total building area of each single planning land block in the five types of planning land used predicted by the master gauge in the workstation; and planning the current building area in the boundary of the historical block by the total building area in the five types of land areas for planning, and distributing the current building area to other planning blocks outside the historical block according to the proportion of the corrected theoretical volume rate obtained in the step three, thereby obtaining the first round of planning block volume rate of the five types of land.
Note: planning within a historical block of blocks is considered to be the same as the current volume rate.
Taking industrial M as an example, the allocation method comprises the following steps:
the total building area T of the M planning plots is known to be 5042.59 ten thousand square meters (the input numerical values are shown in the table 6), and the theoretical volume ratio of each planning plot after being corrected is respectively set to be k1、k2、……ki、……、knLand for each planned plotArea is respectively A1、A2、……Ai、……、An(ii) a Obtaining a multiple b of the plot volume ratio of the planned plot relative to the corrected theoretical volume ratio according to the formula (1);
further, the volume ratio r of the first round planning plot of each planning plot can be obtained1、r2、……ri、……、rn：
r1＝b×k1
r2＝b×k2
……
ri＝b×ki
……
rn＝b×kn；
By analogy, the first round planned plot volume rate of each planned plot of the five main land types is obtained, as shown in fig. 5, the graph shows that the scientific volume rate of each planned plot can be easily obtained after the total building area of each single planned plot predicted by the master rule is input.
Table 6 index table of five planning land used in old central city and urban area of Changchun city
Step five, comparing the first round of planned plot volume ratio of each planned plot of the five types of land used in the step four with the current situation plot volume ratio result of the five types of land used in the step two, finding that the current situation plot volume ratio on the partial planned plots is higher than the first round of planned plot volume ratio, and then redistributing the total building area A in the five types of land used area predicted by the general rule, namely, before the total building area A is redistributed, planning the current situation building area B in the historical block, planning the current situation plot volume ratio on the plot with the current situation plot volume ratio higher than the first round of planned plot volume ratio (aiming at the current situation and the rule), and obtaining the current situation building area DThe land areas of the land blocks are the same and the land properties are the same), planning the planned building area E of the land block and the building area F built in 1990 to obtain the final planned building area G; planning the land areas of five types of land areas, taking the land areas with the current situation land volume ratio higher than the actual planned land volume ratio, the reserved land areas and the residual areas after construction of construction after 1990 as the actual planned land area G, and distributing the final planned building area G in the actual planned land area G according to the same method as the step four (for example, the total building area of a certain type of land is reduced to G, the area of the type of planned land is correspondingly reduced to G, the multiple b of the actual planned volume ratio relative to the corrected theoretical volume ratio needs to be calculated again according to the formula (1), and the actual planned volume ratio of the planned land areas is calculated according to the recalculated multiple b) to obtain the actual planned land volume ratio of all the planned land areas in the actual planned land areas G of the five types of land; the method for calculating the volume ratio of the actual planned plots in the area g for actual planning of the five types of land comprises the following steps: for any one of the areas as TsThe theoretical volume rate of each planning plot after being corrected is respectively set as ks1、ks2、……ksi、……、ksmThe land area of each planning plot is As1、As2、……Asi、……、Asm(ii) a Calculating to obtain the multiple b of the volume ratio of the actual planned plot relative to the corrected theoretical volume ratio according to the formula (2)s；
Further obtaining the actual planned plot volume ratio r of each planned plots1、rs2、……rsi、……、rsm：
rs1＝bs×ks1
rs2＝bs×ks2
……
rsi＝bs×ksi
……
rsm＝bs×ksm；
And by analogy, the actual planned plot volume rate of each planned plot of the five types of land is obtained.
Note: therefore, the research method can be ensured to be in line with the reality, and scientific basis is provided for giving way to the land in the future.
Step six, sleeving a control gauge unit boundary line on a control gauge planning map of an old center urban area in Changchun city, setting K planning land blocks in each control gauge unit, and setting the total planning building area of five types of land in each control gauge unit as QkR、QkA、QkB、QkM、QkW(ii) a Taking M types of industrial land in the control gauge unit as an example, the building area in each planning land is q1、q2、qi、……、qkThe land area of each planned land parcel is A'1、A′2、……、A′i、……A′kEach planned plot volume fraction is r'1、r′2、r′i、......、r′kAnd then:
q1＝r′1×A′1，q2＝r′2×A′2，qi＝r′i×A′i，……，qk＝r′k＝A′k
QkM＝q1+q2+qi+……+qk；
QkMplanning the total building area for the M-type industrial land;
setting the total building area of five types of land planning in the control rule unit as Q, then:
Q＝QkR+QkA+QkB+QkM+QkW
this is shown in figure 6. The figure shows the total distribution of the five types of land planning building areas on the level of the gauge control unit, and is the rigid control of the master gauge on the level of the gauge control unit.
Step seven, setting the total planning land area of each gauge control unit as DKWherein the areas of the K planning plots are respectively
The final planning volume rate of the gauge control unit is FARKAnd then:
the calculated final planned volume rate of the five types of land in the level of the gauge control unit is shown in fig. 7, and the technical effect of the graph is that the final planned volume rate of the five types of land in each gauge control unit can be conveniently and clearly obtained.
And step eight, converting the numerical value intervals of the volume ratios in the final planned volume ratio graph of the five types of land in the control gauge unit into different grades of land use intensity partitions, and storing to obtain the city (town) reference density partition, as shown in fig. 8, wherein the graph has the technical effect of easily obtaining the city (town) reference density partition.
And step nine, drawing and outputting the reference density partition engineering drawing of the urban area range of the old center of the Changchun city.
Claims (6)
1. A method for dividing urban reference density is characterized by comprising the following steps:
step one, obtaining the land areas for the current plots and the planning plots in five types of land according to the current vector diagram and the planning vector diagram of the urban area; obtaining reference land price vector data according to the reference land price map; obtaining vector data of infrastructure elements according to the planning diagram;
step two, obtaining a current building base and the number of building layers according to a current building multivariate information map of an urban area, and obtaining the volume ratio of each current land according to the total building area of each current land and the land area of the corresponding current land obtained in the step one;
assigning values to the planned plots according to the mutual geographical position relationship between the planned plots and various influence factors, giving weights corresponding to the influence factors, and accordingly obtaining the evaluation result values of the influence factors of the planned plots, wherein the evaluation result values of the influence factors of the planned plots are ∑ values of the various influence factors and × weights of the various influence factors, and further obtaining the evaluation and correction results of the influence factors according to the conversion coefficients of the evaluation results, namely the corrected theoretical volume rate, and the evaluation and correction results of the influence factors are × evaluation result conversion coefficients;
planning the current building area in the boundary line of the historical block by the total building area in the five types of land areas for planning, and distributing the corrected theoretical volume rate into other planning blocks outside the historical block according to the proportion of the corrected theoretical volume rate obtained in the step three, so as to obtain the first round of planning block volume rate of the five types of land;
comparing the first round of planned plot volume ratio of each planned plot of the five types of land obtained in the fourth step with the current plot volume ratio result of the five types of land obtained in the second step, finding out the part of the planned plot, of which the current plot volume ratio is higher than that of the first round, of the planned plot, and planning the current building area A in the five types of land area predicted by the general rule to the current building area B in the historical block, the current building area D on the plot, of which the current plot volume ratio is higher than that of the first round of planned plot volume ratio, the planned building area E of the planned plot and the building area F built in nearly thirty years to obtain the final planned building area G; planning the land occupation area of the five types of land, taking the land occupation area with the current situation land occupation area higher than the actual planning land occupation area, the remaining land occupation area after giving out the land occupation area and building occupation area built in nearly thirty years as the actual planning land occupation area G, and distributing the final planning building area G in the actual planning land occupation area G according to the same method as the step four to obtain the actual planning land occupation area of all planning land occupation areas in the actual planning land occupation area G of the five types of land;
step six, sleeving a control gauge sheet on the control gauge planning diagramAnd (3) carrying out statistics and summation on the building areas of the planning plots in the control gauge unit boundary line, and calculating to obtain the total building area Q of the five types of land planning in the control gauge unit: setting total K planning land blocks in each gauge control unit, wherein the total planning building area of five types of land in each gauge control unit is QkR、QkA、QkB、QkM、QkW(ii) a Aiming at M-type industrial land in a control gauge unit, wherein the building area in each planning land is q1、q2、qi、……、qkThe land area of each planned land parcel is A'1、A′2、......、A′i、......A′kEach planned plot volume fraction is r'1、r’2、r’i、......、r’kAnd then:
q1＝r’1×A′1，q2＝r’2×A′2，qi＝r’i×A′i，......，qk＝r’k×A′k
QkM＝q1+q2+qi+......+qk；
by analogy, the total planned building area Q of other four types of land in each gauge control unit can be calculatedkR、QkA、QkB、QkW(ii) a Setting the total building area of five types of land planning in the control rule unit as Q, then:
Q＝QkR+QkA+QkB+QkM+Qkw
step seven, calculating to obtain the final planned volume rate of each gauge control unit according to the total planned land area of each gauge control unit and the total building area Q of the five types of land plans in the gauge control unit obtained in the step six; setting the total planning land area of each gauge control unit as DKWherein the areas of the K planning plots are respectively
The final planning volume rate of the gauge control unit is FARKAnd then:
and step eight, converting the numerical range of the final planning volume rate of the five types of land in the control gauge unit into different grades of land use intensity partitions to obtain the urban area reference density partition.
2. The urban reference density zoning method according to claim 1, wherein in the step one, the presence vector map is a map for urban current construction or a control current map of the previous year; the planning vector diagram is a general urban area planning diagram or a detailed urban area control planning diagram.
3. The urban reference density zoning method according to claim 1, wherein in the third step, the influence factors comprise a reference price zone and distance and range from subway station, public service center, park green and river, expressway, primary and secondary arterial road, branch road, railway, airport, and the higher the reference price, the greater the value is assigned to the subway station, public service center, park green and river, expressway, primary and secondary arterial road, branch road, railway, airport.
4. The urban area reference density zoning method according to claim 1 or 3, characterized in that in the third step, when the area of the planned plot is less than or equal to 10000 meters, the reduction coefficient is set to 1.05-1.15; when the area of the planned plot is 10000-30000 meters, the conversion coefficient is set to be 0.95-1.05; when the area of the planned plot is 30000-40000 m, the conversion coefficient is set to be 0.85-0.95; when the area of the planned plot is larger than or equal to 40000 m, the conversion coefficient is set to be 0.75-0.85.
5. The method of claim 1, wherein in step four, the modified theoretical volume fraction obtained in step three is distributed to the rest of the planned plots outside the historical blocks, so as to obtain the volume fraction of the first round of planned plots of five general plots as follows:
setting the corrected theoretical volume rate of each planning plot as k for any planning plot with area of T1、k2、......ki、......、knThe land area of each planning plot is A1、A2、......Ai、......、An(ii) a Calculating to obtain a multiple b of the plot volume ratio of the planned plot relative to the corrected theoretical volume ratio according to the formula (1);
further obtaining the first round planning plot volume ratio r of each planning plot1、r2、......ri、......、rn：
r1＝b×k1
r2＝b×k2
……
ri＝b×ki
……
rn＝b×kn；
And by analogy, the first round of planned plot volume rate of each planned plot of the five types of land is obtained.
6. The urban area reference density zoning method according to claim 1, wherein in the step five, the calculation method of the actual planned plot volume ratio of the planned plot within the plot area g for actual planning of five types of land is as follows: for any one of the areas as TsThe theoretical volume rate of each planning plot after being corrected is respectively set as ks1、ks2、......ksi、......、ksmThe land area of each planning plot is As1、As2、......Asi、......、AsmCalculating to obtain the multiple b of the volume ratio of the actual planned plot relative to the corrected theoretical volume ratio according to the formula (2)s；
Further obtaining the actual planned plot volume ratio r of each planned plots1、rs2、......rsi、......、rsm：
rs1＝bs×ks1
rs2＝bs×ks2
……
rsi＝bs×ksi
……
rsm＝bs×ksm；
And by analogy, the actual planned plot volume rate of each planned plot of the five types of land is obtained.
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| CN115049028A (en) * | 2022-08-17 | 2022-09-13 | 中建五局第三建设有限公司 | Construction area partitioning method, system, terminal and medium based on unsupervised learning |
| CN116186854A (en) * | 2023-02-15 | 2023-05-30 | 深圳市城市规划设计研究院股份有限公司 | Method and device for calculating volume rate of land, electronic equipment and storage medium |
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| CN116186854B (en) * | 2023-02-15 | 2023-09-26 | 深圳市城市规划设计研究院股份有限公司 | Method and device for calculating volume rate of land, electronic equipment and storage medium |
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