CN101614807A - Building floor area ratio based on Digital image technology is determined method - Google Patents
Building floor area ratio based on Digital image technology is determined method Download PDFInfo
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Abstract
A kind of building floor area ratio based on Digital image technology is determined method, and based on palm PC and digital camera, GPS and total powerstation are auxilliary, realizes the total digitalization collection and the record of field operation information.When field operation was measured, palm PC received GPS or total powerstation positioning result in real time by bluetooth communication, in conjunction with existing base map in the palm PC, generated field investigation figure layer; With digital camera buildings is taken pictures and to obtain abundant building information; In the industry data handling system can finish the three-dimensional coordinate that individual photo and stereogram are resolved the buildings angle point, gross building area calculates, statistical regions ancestor ground area calculates, plot ratio is calculated.
Description
Technical field
The present invention relates to the information investigation of urban architecture plot ratio, particularly a kind of building floor area ratio based on Digital image technology is determined method, belongs to land management electronic information technical field.
Background technology
Quick propelling along with Chinese Urbanization, the urban architecture plot ratio is as an important symbol weighing urban land use intensification degree and Level of Urban Modernization, obtains all kinds of land used floor area of building in urban architecture plot ratio and city exactly and can provide important basic space information for city planning and real estate management.Building floor area ratio is meant the ratio of gross building area and building area in certain plot (i.e. ancestor ground area).Usually, utilize large scale topographical map directly to measure calculation, but the cycle is long, the cost height, the city building floor area ratio that GPRS has a trend of the times in the urban construction is mainly estimated by remote sensing investigation.At present, domesticly utilize remote sensing technique to carry out the building floor area ratio investigation method to mainly contain direct method, sciagraphy, shadowing method and high differentiation.(1) direct surveys method: by artificial on-site inspection, or by the floor counting of methods such as large scale boat sheet to each buildings, obtain building floorage and building area by field survey, boat sheet decipher or map measurement then, thereby calculate building floor area ratio.(2) high differentiation and sciagraphy: this rule of the discrepancy in elevation of utilizing depth of building to equal top of building and bottom is calculated the buildings plot ratio, highly to calculate the number of plies of buildings, estimates the buildings plot ratio again.(3) shade length method: shade length method is the image-forming principle according to remote sensing image, utilizes the shadow length that falls of buildings, and the sun altitude during imaging calculates depth of building, highly to calculate the number of plies of buildings, estimates the buildings plot ratio again.Derive methods such as shade width method and shaded area method from shade length method, its results of measuring is then main relevant with the features such as position, orientation, shape and distribution of image data source, the mathematical model of being set up and buildings.Calculate the average error of plot ratio generally about in the of 10% by analyzing the various remote sensing image interpretative methods of discovery, particularly for baroque buildings, be difficult to accurately judge the floor area of building of the buildings number of plies and different layers, and can't accurately measure the plot ratio (complex building is that the same building thing exists the different floor of flat shape) of complex building.
Summary of the invention
The object of the invention is to overcome the deficiency of prior art, provides a kind of building floor area ratio based on digital imaging technology to determine method, and its technology contents is:
A kind of building floor area ratio based on Digital image technology is determined method, it is characterized in that being provided with:
(1) is used for the GNSS network of global positioning satellite;
(2) field data acquisition system: comprise that operating system is Windows Mobile 5.0 and above version and palm PC, digital camera, GPS RTK equipment, total powerstation equipment and the bluetooth module that the field data acquisition software is installed;
(3) interior industry data handling system: industry data processing software and hardware in being provided with comprises SQL SERVER .Net Framework2.0, Supermap Objects2008 and the interior computing machine of data handling system already is installed;
The industry data handling system is obtained map datum by the access chart database in above-mentioned, is transferred to the palm PC of field data acquisition system by data line.On-the-spot in investigation, at first adopt high precision double frequency GPS receiver to carry out the coordinate translocation, carry out coordinate conversion and obtain the survey area coordinate conversion parameter, if conversion parameter is known, directly input in PDA field operation software; Utilize coordinates transformation method to carry out space and geographical coordinate projection conversion in real time by field operation software, the GPS latitude and longitude coordinates that is received is converted to the planimetric coordinates of vector base map, and GPS point and information thereof are presented on the human-computer interaction interface of field operation software in real time.Carrying out field operation then measures: distributing GPS First Control point, the arrangement total powerstation obtains the buildings angle point on First Control point, and GPS reference mark and buildings angle point all can be used as picture control point.The field operation software that operates on the palm PC can receive GPS RTK or total powerstation positioning result in real time by bluetooth communication, also can carry out screen and get a little, can make up control point diagram layer, ancestor's map layer, architecture bottom layer figure layer according to in-site measurement, base map information in conjunction with existing base map.With digital camera buildings is taken pictures at last.After field process finishes, by data line with photo and field data acquisition data upload to interior industry data handling system, based on control point diagram layer, utilize single-sheet photo to resolve photographic information, then by cubic phase to resolving the three-dimensional coordinate of the buildings angle point that can obtain the Different Plane position floor of complex building except that bottom.Calculate the gross building area of buildings, select statistical regions, statistical regions is carried out ancestor ground area statistics, generate form, plot ratio is calculated, and achievement is stored in the database in the lump.
The concrete steps of the inventive method are:
(1) base map imports: interior industry data handling system is downloaded map datum by the access chart database, makes the field investigation base map, and these data are imported in the palm PC of field data acquisition system by data line.
(2) coordinate translocation or parameter input: adopt high precision double frequency GPS receiver to carry out the coordinate translocation, carry out coordinate conversion and obtain the survey area coordinate conversion parameter, coordinate transformation parameter is imported in the palm PC field operation software; Utilize coordinates transformation method to carry out space and geographical coordinate projection conversion in real time by field operation software, the GPS latitude and longitude coordinates that is received is converted to the planimetric coordinates of vector base map, and GPS point and information thereof are presented on the human-computer interaction interface of field operation software in real time.
(3) picture control point is laid: broad view position distributing GPS First Control point at the scene, based on First Control point selection buildings angle point as picture control point.Picture control point should guarantee to go up in any direction and can observe more than 6, at three dimensions certain extension is arranged all simultaneously.Under the situation of 6 of picture control point less thaies, nigh First Control point is gone up and is settled label, makes picture control point be at least 6.
(4) the acquisition controlling dot information generates picture control point figure layer: on First Control point, observe with GPS RTK receiver, obtain the 3 d space coordinate of First Control point; On First Control point, settle total powerstation, obtain the three-dimensional coordinate of buildings angle point.The point that GPS and total powerstation record constitutes picture control point figure layer jointly.
(5) gather boundary mark information and generate ancestor's map layer: if the base map data is a topomap, on control point diagram layer basis, utilize GPS or total powerstation to obtain the three-dimensional coordinate of ancestor ground boundary mark, the field operation software of real-time Transmission to the palm PC, make up ancestor's map spot, generate ancestor's map layer.If the base map data is a cadastre, with reference to step (6), the ancestor ground boundary mark directly clicking on the palm PC on the base map makes up ancestor's map layer.
(6) gather building information and generate architecture bottom layer figure layer: by field investigation,, directly click architecture bottom layer culture point on the base map, make up buildings figure spot, typing buildings attribute, generate architecture bottom layer figure layer based on base map on the palm PC.The design of buildings attribute has buildings ID, floor structure.Every solitary building ID is unique, and the floor of same building thing Different Plane shape carries out association by this ID.Floor structure is represented the number of floor levels of buildings Different Plane shape, and has only bottom figure spot to have the floor structure property value, and the number of plies of bottom figure spot is the first digit in the floor structure property value.
(7) digital camera is taken pictures on the spot: the stereogram that adopts digital camera to take buildings from the direction that can reflect the buildings complexity, the camera angle of forming stereogram should be greater than 45 ° and less than 135 °.Buildings should be in the centre position of photo, and makes engineer's scale maximum as far as possible by the focusing photography.
(8) the field operation software that operates on the palm PC saves as the shapefile formatted file with all spaces and attribute information, finishes until the field data collecting work.
(9) field data imports interior industry data handling system: the digital photo that picture control point figure layer, architecture bottom layer figure layer, ancestor's map layer and the digital camera of field data acquisition generation are taken pictures imports in the interior industry data handling system by data line.If simple buildings then goes to step (12), if complex building, then execution in step (10).
(10) individual photo resolves photographic information: based on picture control point figure layer, utilize the two dimensional surface coordinate on photo of picture control point and the three dimensional space coordinate that the field operation total powerstation is gathered, utilize photogrammetric Theory, calculate the elements of interior orientation of digital photo, the elements of exterior orientation and the distortion factor of photo.Wherein, elements of exterior orientation comprises the camera positions parameter X
S, Y
S, Z
SWith the photography attitude parameter
ω, κ, elements of interior orientation comprise the image coordinate x of shadow objective focal length f and photo principal point
0, y
0, the photo principal point is the intersection point point of object lens center on photo.The object lens distortion factor is k
1
(11) stereogram is resolved planimetric coordinates information: according to the different characteristics in the different floor level positions of complex building, on stereogram, obtain the photo coordinate of the buildings angle point of the different area floor level position of expression except that bottom, utilize the forward intersection principle of stereogram, calculate the 3 d space coordinate of these angle points, and formed complete buildings figure layer jointly with the architecture bottom layer figure layer that field operation generates.
(12) the buildings total area calculates: the figure spot of traversal owned building figure layer, the gross floors area of calculating buildings.
(13) plot ratio is calculated: select the plot ratio zoning, this zone can be an ancestor of place ground or some ancestors of place ground, and area statistics and calculating are carried out in this zone, generates statistical report form, the computed volume rate.
Advantage of the present invention and remarkable result:
(1) design of novelty the new method of plot ratio field investigation, based on palm PC and digital camera, GPS and total powerstation are auxilliary, realize the total digitalization collection and the record of field operation information, the field process amount is little, the computational accuracy height.Palm PC can be stored a large amount of electronic charts and various electronic document data, receive and resolve automatically the locating information of GPS and total powerstation, and GPS latitude and longitude coordinates conversion is automatically converted to the planimetric coordinates of vector base map in real time, and GPS point, total powerstation point and information thereof are presented on the human-computer interaction interface of field operation software in real time; The buildings digital photograph that digital camera is taken can provide abundant building information, utilizes individual photo and stereogram to resolve the three-dimensional coordinate that can obtain the buildings angle point.
(2) design of novelty the data organizational structure of complex building, comprise buildings ID and floor structure.Every solitary building ID is unique, and the floor of same building thing Different Plane shape carries out association by this ID.Floor structure is represented the number of floor levels of Different Plane shape, and routine 2-3 represents that there are two kinds of flat shapes in this solitary building, is respectively 2 layers and 3 layers.In interior industry data processing software, can inquire the figure spot that belongs to the same building thing by ID, represent its number of plies of building sides product addition again of the figure spot of Different Plane shape, can obtain the gross building area of this buildings.
(3) design of novelty interior industry data handling system, in conjunction with the base map information on the palm PC, GPSRTK, total powerstation collect picture control point figure layer, architecture bottom layer figure layer, ancestor's map layer etc., in interior industry system, carry out overall treatment with digital photo, the locus that obtains complex building distributes, and then carry out area calculating, plot ratio calculating, and result of calculation deposits in the database, and data management is convenient, efficient.
The present invention can be applicable to following field or industry:
(1) planning department is used for the plot ratio measurement;
(2) house property department is used for the plot ratio measurement;
(3) territory department is used for the plot ratio measurement.
Description of drawings
Fig. 1 is system's connection diagram of the inventive method;
Fig. 2 is a data flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is further described.
As Fig. 1, be provided with based on the building floor area ratio investigation method of Digital image technology
(1) is used for the GNSS network of global positioning satellite;
(2) field data acquisition system: operating system is one of Windows Mobile 5.0 and above version and of one of palm PC, the digital camera that the field data acquisition software is installed, GPS RTK equipment one cover, total powerstation equipment one cover, bluetooth module;
(3) industry data handling system in
In industry data processing software and hardware form: SQL SERVER .Net Framework 2.0, Supermap Objects2008 and be equipped with in one in the computing machine of industry data handling system;
The industry data handling system is obtained map datum by the access chart database in above-mentioned, transfers to the palm PC of field data acquisition system; Adopt the GPS receiver to carry out the coordinate translocation, obtain the survey area coordinate conversion parameter after the coordinate conversion, coordinate transformation parameter is imported in the palm PC field operation software, carry out the conversion of space and geographical coordinate projection by field operation software; The GPS latitude and longitude coordinates that is received is converted to the planimetric coordinates of vector base map, and GPS point and information thereof are presented on the human-computer interaction interface of field operation software in real time; Carry out field operation when measuring, distributing GPS First Control point is provided with total powerstation and obtains the buildings angle point on First Control point, with GPS reference mark and buildings angle point as picture control point; Operate in the field operation software on the palm PC, receive GPS or total powerstation positioning result in real time by bluetooth communication, carry out screen in conjunction with existing base map and get a little, according to in-site measurement and base map information architecture picture control point figure layer, ancestor's map layer and architecture bottom layer figure layer; With digital camera buildings is taken pictures; After field process finishes, with photo and field data acquisition data upload interior industry data handling system extremely; Based on picture control point figure layer, utilize individual photo to resolve photo information, then by cubic phase to resolving the three-dimensional coordinate of the buildings angle point that obtains the Different Plane position floor of complex building except that bottom; Calculate the gross building area of buildings, statistical regions is carried out ancestor's ground area statistics and calculating, obtain plot ratio.
As Fig. 2, the inventive method specifically may further comprise the steps:
(1) make working map and data importing with interior industry data handling system: interior industry data handling system is by the access chart database, download map datum, make the field investigation base map, these data are imported in the palm PC of field data acquisition system by data line, and the field data acquisition software that operates on the palm PC can read, show, control and switch these data.
(2) coordinate translocation or parameter input: adopt high precision double frequency GPS receiver to carry out the coordinate translocation, carry out coordinate conversion and obtain the survey area coordinate conversion parameter, coordinate transformation parameter is imported in the palm PC field operation software; Utilize coordinates transformation method to carry out space and geographical coordinate projection conversion in real time by field operation software, the GPS latitude and longitude coordinates that is received is converted to the planimetric coordinates of vector base map, and GPS point and information thereof are presented on the human-computer interaction interface of field operation software in real time.
(3) picture control point is laid: broad view position distributing GPS First Control point at the scene, based on First Control point selection buildings angle point as picture control point.Picture control point should guarantee to go up in any direction and can observe more than 6, at three dimensions certain extension is arranged all simultaneously.Under the situation of 6 of picture control point less thaies, nigh First Control point is gone up and is settled label, makes picture control point be at least 6.
(4) the acquisition controlling dot information generates picture control point figure layer: on First Control point, observe with the GPSRTK receiver, obtain the 3 d space coordinate of First Control point; On First Control point, settle the non-prism total powerstation, obtain the three-dimensional coordinate of buildings angle point.The point that GPS and total powerstation record constitutes picture control point figure layer jointly.
(5) gather boundary mark information and generate ancestor's map layer: if the base map data is a topomap, on control point diagram layer basis, utilize GPS or total powerstation to obtain the three-dimensional coordinate of ancestor ground boundary mark, the field operation software of real-time Transmission to the palm PC, make up ancestor's map spot, generate ancestor's map layer.If the base map data is a cadastre, with reference to step (6), the ancestor ground boundary mark directly clicking on the palm PC on the base map makes up ancestor's map layer.
(6) gather building information and generate buildings figure layer: by field investigation,, directly click architecture bottom layer culture point on the base map, make up buildings figure spot, typing buildings attribute, generate architecture bottom layer figure layer based on base map on the palm PC.The design of buildings attribute has buildings ID, floor structure.Every solitary building ID is unique, and the floor of same building thing Different Plane shape carries out association by this ID.Floor structure is represented the number of floor levels of buildings Different Plane shape, and routine 2-3 represents that there are two kinds of flat shapes in this solitary building, is respectively 2 layers and 3 layers.And have only bottom figure spot to have the floor structure property value, the number of plies of bottom figure spot is the first digit in the floor structure property value.
(7) digital camera is taken pictures on the spot: the stereogram that adopts digital camera to take buildings from the direction that can reflect the buildings complexity, the camera angle of forming stereogram should be greater than 45 ° and less than 135 °.Buildings should be in the centre position of photo, and makes engineer's scale maximum as far as possible by the focusing photography.
(8) the field operation software that operates on the palm PC saves as the shapefile formatted file with all spaces and attribute information, finishes until the field data collecting work.
(9) field data imports interior industry data handling system: the digital photo that picture control point figure layer, architecture bottom layer figure layer, ancestor's map layer and the digital camera of field data acquisition generation are taken pictures imports in the interior industry data handling system by data line.If simple buildings then goes to step (11), if complex building, then execution in step (10).
(12) individual photo resolves photographic information: based on picture control point figure layer, utilize the two dimensional surface coordinate on photo of picture control point and the three dimensional space coordinate that the field operation total powerstation is gathered, utilize photogrammetric Theory, calculate the elements of interior orientation of digital photo, the elements of exterior orientation and the distortion factor of photo.Wherein, elements of exterior orientation comprises the camera positions parameter X
S, Y
S, Z
SWith the photography attitude parameter
ω, κ, elements of interior orientation comprise the image coordinate x of shadow objective focal length f and photo principal point
0, y
0, the photo principal point is the intersection point point of object lens center on photo.The object lens distortion factor is k
1
(11) stereogram is resolved planimetric coordinates information: according to the different characteristics in the different floor level positions of complex building, on stereogram, obtain the photo coordinate of the buildings angle point of the different area floor level position of expression except that bottom, utilize the forward intersection principle of stereogram, calculate the 3 d space coordinate of these angle points, get the x of these angle points, the y coordinate makes up the buildings figure spot with the inconsistent floor of shapes of substrates, and typing buildings ID, the number of floor levels attribute, wherein buildings ID can directly duplicate bottom figure spot buildings ID, the floor structure that number of floor levels can read bottom figure spot obtains, and the architecture bottom layer figure layer that new figure spot that makes up and field operation generate has been formed complete buildings figure layer jointly.
Computing method are: each impact point about in two photos same place be expressed as (x as planimetric coordinates
1y
1), (x
2y
2), utilize collinearity equation to obtain tight forward intersection formula:
In the formula: X
D, Y
D, Z
DBe the volume coordinate of impact point, be unknown number;
It is the picpointed coordinate correction;
Utilize principle of least square method to calculate the three-dimensional coordinate of impact point.Considering between the angle point of buildings usually have intrinsic geometric relationship, as conditional value, is theoretical foundation with the indirect adjustment that has condition with these space geometry conditions, realizes the tight algorithm of multiple spot forward intersection.According to the difference of fixed in space condition, six kinds of situations in the following table are calculated, to improve the precision of calculating.
(12) the buildings total area calculates: for simple buildings, the gross building area of buildings equals the ground floor area of buildings and the product of the number of plies; For complex building, carry out the SQL query operation earlier, obtain the buildings ID of this record, the traversing graph spot is found out all figure spots of its buildings ID unanimity then, each figure spot area that the gross building area of buildings equals to constitute this buildings multiply by its number of plies sum, and result of calculation is composed the spot to bottom figure.
(13) plot ratio is calculated: select the plot ratio zoning, this zone can be an ancestor of place ground or some ancestors of place ground, selection area is carried out a geo-statistic and area calculating, the buildings statistics, generate statistical report form,, carry out plot ratio and calculate according to statistics, the statistical report form and the plot ratio result of calculation that generate are stored in the database, are used for history and recall and inquiry.
Claims (2)
1, a kind of building floor area ratio based on Digital image technology is determined method, it is characterized in that being provided with:
(1) is used for the GNSS network of global positioning satellite;
(2) field data acquisition system: comprise that operating system is Windows Mobile 5.0 and above version and palm PC, digital camera, GPS equipment, total powerstation equipment and the bluetooth module that the field data acquisition software is installed;
(3) interior industry data handling system: industry data processing software and hardware in being provided with comprises SQL SERVER .Net Framework2.0, Supermap Objects2008 and the interior computing machine of data handling system already is installed;
The industry data handling system is obtained map datum by the access chart database in above-mentioned, transfers to the palm PC of field data acquisition system; Adopt the GPS receiver to carry out the coordinate translocation, obtain the survey area coordinate conversion parameter after the coordinate conversion, coordinate transformation parameter is imported in the palm PC field operation software, carry out the conversion of space and geographical coordinate projection by field operation software; The GPS latitude and longitude coordinates that is received is converted to the planimetric coordinates of vector base map, and GPS point and information thereof are presented on the human-computer interaction interface of field operation software in real time; Carry out field operation when measuring, distributing GPS First Control point is provided with total powerstation and obtains the buildings angle point on First Control point, with GPS reference mark and buildings angle point as picture control point; Operate in the field operation software on the palm PC, receive GPS or total powerstation positioning result in real time by bluetooth communication, carry out screen in conjunction with existing base map and get a little, according to in-site measurement and base map information architecture picture control point figure layer, ancestor's map layer and architecture bottom layer figure layer; With digital camera buildings is taken pictures; After field process finishes, with photo and field data acquisition data upload interior industry data handling system extremely; Based on picture control point figure layer, utilize individual photo to resolve photo information, then by cubic phase to resolving the three-dimensional coordinate of the buildings angle point that obtains the Different Plane position floor of complex building except that bottom; Calculate the gross building area of buildings, statistical regions is carried out ancestor's ground area statistics and calculating, obtain plot ratio.
2, determine method according to the described building floor area ratio of claim 1, it is characterized in that according to the following steps based on Digital image technology:
(1) base map imports: interior industry data handling system is downloaded map datum by the access chart database, makes the field investigation base map, and these data are imported in the palm PC of field data acquisition system by data line.
(2) coordinate translocation or parameter input: adopt high precision double frequency GPS receiver to carry out the coordinate translocation, carry out coordinate conversion and obtain the survey area coordinate conversion parameter, conversion parameter is imported in the field operation software of palm PC; Utilize coordinates transformation method to carry out space and geographical coordinate projection conversion in real time by field operation software, the GPS latitude and longitude coordinates that is received is converted to the planimetric coordinates of vector base map, and GPS point and information thereof are presented on the human-computer interaction interface of field operation software in real time.
(3) picture control point is laid: broad view position distributing GPS First Control point at the scene, based on First Control point selection buildings angle point as picture control point.Picture control point should guarantee to go up in any direction and can observe more than 6, at three dimensions certain extension is arranged all simultaneously; Under the situation of 6 of picture control point less thaies, nigh First Control point is gone up and is settled label, makes picture control point be at least 6.
(4) the acquisition controlling dot information generates control point diagram layer: on First Control point, observe with GPS RTK receiver, obtain the 3 d space coordinate of First Control point; Settle total powerstation on First Control point, obtain the three-dimensional coordinate of buildings angle point, the point that GPS and total powerstation record constitutes picture control point figure layer jointly.
(5) gather boundary mark information and generate ancestor's map layer: if the base map data is a topomap, on control point diagram layer basis, utilize GPS or total powerstation to obtain the three-dimensional coordinate of ancestor ground boundary mark, the field operation software of real-time Transmission to the palm PC, make up ancestor's map spot, generate ancestor's map layer.If the base map data is a cadastre, with reference to step (6), the ancestor ground boundary mark directly clicking on the palm PC on the base map makes up ancestor's map layer.
(6) gather building information and generate architecture bottom layer figure layer: by field investigation,, directly click architecture bottom layer culture point on the base map, make up buildings figure spot, typing buildings attribute, generate architecture bottom layer figure layer based on base map on the palm PC; The design of buildings attribute has buildings ID, floor structure; Every solitary building ID is unique, the floor of same building thing Different Plane shape carries out association by this ID, floor structure is represented the number of floor levels of buildings Different Plane shape, have only bottom figure spot to have the floor structure property value, the number of plies of bottom figure spot is the first digit in the floor structure property value.
(7) digital camera is taken pictures on the spot: adopt digital camera to take the stereogram of buildings from the direction that can reflect the buildings complexity, the camera angle of forming stereogram should be greater than 45 ° and less than 135 °, buildings should be in the centre position of photo, and makes engineer's scale maximum as far as possible by the focusing photography.
(8) the field operation software that operates on the palm PC saves as the shapefile formatted file with all spaces and attribute information, finishes until the field data collecting work.
(9) field data imports interior industry data handling system: the digital photo that picture control point figure layer, architecture bottom layer figure layer, ancestor's map layer and the digital camera of field data acquisition generation are taken pictures imports in the interior industry data handling system by data line; If simple buildings then goes to step (12), if complex building, then execution in step (10).
(10) individual photo resolves photographic information: based on picture control point figure layer, utilize the two dimensional surface coordinate on photo of picture control point and the three dimensional space coordinate that the field operation total powerstation is gathered, utilize photogrammetric Theory, calculate the elements of interior orientation of digital photo, the elements of exterior orientation and the distortion factor of photo; Wherein, elements of exterior orientation comprises the camera positions parameter X
S, Y
S, Z
SWith the photography attitude parameter
ω, κ, elements of interior orientation comprise the image coordinate x of shadow objective focal length f and photo principal point
0, y
0, the photo principal point is the intersection point point of object lens center on photo, the object lens distortion factor is k
1
(11) stereogram is resolved planimetric coordinates information: according to the different characteristics in the different floor level positions of complex building, on stereogram, obtain the photo coordinate of the buildings angle point of the different area floor level position of expression except that bottom, utilize the forward intersection principle of stereogram, calculate the 3 d space coordinate of these angle points, and formed complete buildings figure layer jointly with the architecture bottom layer figure layer that field operation generates.
(12) the buildings total area calculates: the figure spot of traversal owned building figure layer, the gross floors area of calculating buildings.
(13) plot ratio is calculated: select the plot ratio zoning, this zone can be an ancestor of place ground or some ancestors of place ground, and area statistics and calculating are carried out in this zone, generates statistical report form, the computed volume rate.
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