CN107992702B - Method for converting various BIM model data into DEM data - Google Patents
Method for converting various BIM model data into DEM data Download PDFInfo
- Publication number
- CN107992702B CN107992702B CN201711347219.9A CN201711347219A CN107992702B CN 107992702 B CN107992702 B CN 107992702B CN 201711347219 A CN201711347219 A CN 201711347219A CN 107992702 B CN107992702 B CN 107992702B
- Authority
- CN
- China
- Prior art keywords
- dimensional model
- engineering
- data
- model
- arcgis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
Abstract
The invention discloses a method for converting various BIM model data into DEM data, which comprises the following steps of 1, preparing a three-dimensional model and a platform; step 2, encrypting the vertex of the three-dimensional model; 3, exporting and importing the three-dimensional model vertex data; and 4, step 4: coordinate elevation extraction and DEM production of the three-dimensional model vertex: firstly, setting layer coordinates in the geographic information platform Arcgis as projection coordinates adopted by engineering; then, converting the imported model format of dgn or dwg and the like into an ArcGIS native data format; and finally, extracting the required elevation data of the vertex coordinates of the surface of the engineering general assembly three-dimensional model in ArcGis through a set of spatial data analysis processing method and producing the final DEM data. The invention has the advantages of solving the problem that DEM can only be produced originally and is difficult to produce secondarily, greatly facilitating the subsequent engineering design work such as hydrodynamic simulation and the like, and promoting the progress of the engineering design field.
Description
Technical Field
The invention relates to a BIM technology and a spatial geographic information technology, in particular to a method for converting various BIM model data into DEM data.
Background
DEM, which is a Digital Elevation Model (abbreviation of english Digital Elevation Model), is a Digital simulation of ground terrain by limited terrain Elevation data, and is generally stored in a grid data format including Tif and other geographic coordinate information, and each pixel point on the grid represents an Elevation point and includes X, Y, Z (Elevation) coordinate information. DEM has wide application in surveying and mapping, engineering construction, hydrology, communication and other national economy. The current methods for establishing the DEM include: the method comprises the steps of generating elevation scattered points and contour lines obtained through measurement, producing aerial side images such as unmanned planes or satellites, producing point clouds obtained through laser radars and the like, wherein the production belongs to the original production of DEMs. In actual engineering, the DEM is often required to be secondarily produced, that is, after engineering three-dimensional design such as site excavation and backfilling, three-dimensional building model construction, landscape model arrangement and the like is performed on the basis of the original DEM, the assembled engineering integral three-dimensional model is required to be secondarily produced into a new DEM for subsequent work such as hydrodynamic simulation and the like. However, due to the reasons of multiple sources and non-uniform formats of three-dimensional models in engineering design, the original DEM cannot be directly converted into a secondary production new DEM by each three-dimensional design platform software.
Disclosure of Invention
The invention aims to provide a method for converting various BIM model data into DEM data so as to solve the problem of secondary production of DEM in engineering.
In order to achieve the purpose, the invention adopts the following technical scheme:
the method for converting various BIM model data into DEM data comprises the following steps:
step 1, preparation of a three-dimensional model and a platform: in a three-dimensional design platform, the advantages of three-dimensional design platform model assembly and high-precision coordinate positioning are exerted, an original terrain model, an engineering excavation backfill model, an engineering building model and other general format three-dimensional models (such as FBX, OBJ, 3DS and the like) are assembled together according to engineering design and coordinate positions, and an engineering final assembly three-dimensional model is completed;
step 2, encrypting the vertex of the three-dimensional model: in order to enable the vertex density of the three-dimensional model to meet the demand of DEM production, in a three-dimensional design platform, drawing a plurality of mutually vertical and crossed line segments (the distance is equal to the grid resolution, such as 5m multiplied by 5 m) on an XY coordinate plane of the engineering assembly three-dimensional model by the demanded DEM grid resolution (such as 5m multiplied by 5 m), forming a line segment grid to cover the range of the engineering assembly three-dimensional model, then covering the line segment grid on the surface of the engineering assembly three-dimensional model by adopting tools such as projection, impression and the like in three-dimensional design software, and combining the line segment grid and the engineering assembly three-dimensional model into a whole, so that each vertex of the line segment grid becomes the vertex of the engineering assembly three-dimensional model, and the encryption of the vertex of the engineering assembly three-dimensional model is completed;
step 3, exporting and importing the three-dimensional model vertex data: breaking up the three-dimensional model of the engineering assembly into line segments according to original coordinates in three-dimensional design software, removing the line segments positioned on the bottom surface of the three-dimensional model of the engineering assembly, leading out the line segments together with the projected encrypted grid line segments in the original format (such as dgn format) of a three-dimensional design platform or in the format of a third-party platform (such as dwg format), and then leading the line segments into a geographic information platform ArcGIS;
and 4, step 4: firstly, setting layer coordinates in the geographic information platform Arcgis as projection coordinates adopted by engineering; then, converting the imported model format such as dgn or dwg into an ArcGIS native data format (such as shp and gdb); and finally, extracting the required engineering final assembly three-dimensional model surface vertex coordinate elevation data and producing final DEM data in a geographic information platform ArcGis through a set of spatial data analysis processing method.
In step 4, in the geographic information platform ArcGis, the method for extracting the engineering assembly three-dimensional model vertex coordinate elevation and producing the final DEM data comprises the following steps:
s1, element breakpoint and turning point: converting each control folding point on a line segment and a multi-segment line into a point element by adopting an element folding point converting tool in the ArcGIS;
s2, point element screening: adopting a screening tool in ArcGis to brush off point elements without elevation attribute fields (Z coordinate attribute fields);
s3, adding an XY coordinate attribute field: adding an XY coordinate attribute field of the point element by adopting an 'adding XY coordinate' tool in ArcGis;
s4, point element fusion: adopting a 'fusion' tool in ArcGIS, simultaneously taking X coordinate and Y coordinate attribute fields as fusion fields, taking a Z coordinate attribute field as a statistical field, and taking the maximum value of the statistical type to complete the fusion processing of the point elements; after processing, point elements with the same X, Y coordinates are fused into one point element, and the elevation of the point element is the top elevation of the three-dimensional model, so that the problems of repetition of the same XY coordinate point elements and selection of the elevation of the point element are solved;
s5, transferring the terrain to a grid: and (3) converting point elements with X, Y projection coordinates and elevations after fusion processing into DEM grid data by using a 'terrain to grid' tool in ArcGis.
The method has the advantages that the engineering three-dimensional design models with various sources and formats are secondarily produced into DEM data, the problem that the DEM can only be originally produced and is difficult to secondarily produce is solved, the subsequent engineering design work such as hydrodynamic simulation is greatly facilitated, and the progress in the engineering design field is promoted.
Drawings
Fig. 1 is a general flow diagram and a sub-flow diagram of each technology node of the present invention.
FIG. 2 is a schematic diagram of the method steps of the present invention.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, a river engineering including excavation backfill, hydraulic buildings such as spur dikes, and other landscape models such as natural rocks is now taken as an example for further detailed description:
step 1, preparation of a three-dimensional model and a platform: firstly, adopting three-dimensional terrain excavation software (such as Geopak) in a three-dimensional design platform (such as Bentley series) to carry out excavation and backfilling on a designed river channel and two bank embankments on the basis of original terrain, thereby obtaining a three-dimensional excavation model of the designed river channel; then, building other hydraulic engineering building models of the river according to the design size and coordinates by adopting three-dimensional modeling software (such as MicroStation) in a Bentley series three-dimensional design platform, such as spur dikes on two banks of the river, and assembling the hydraulic engineering building models and the excavation models together according to the coordinates (BIM mature technology); and finally, building or downloading three-dimensional isomer models such as natural rocks from three-dimensional software such as 3DS max in a universal three-dimensional model format such as FBX, OBJ, 3DS and the like, adjusting the shape, the size and the position in a three-dimensional design platform, and assembling the three-dimensional isomer models with the engineering three-dimensional design model to finally complete the final assembly of the engineering three-dimensional model, namely the engineering final assembly three-dimensional model.
Step 2, encrypting the vertex of the three-dimensional model: determining the density of model vertex data by using the required grid resolution, taking 5m multiplied by 5m as an example, drawing a plurality of mutually vertical crossed line segments on an XY coordinate plane of an engineering assembly model, wherein the distance between the line segments is 5m, thereby forming a line segment grid to cover the range of the whole engineering assembly model, then covering the line segment grid on the surface of the engineering assembly three-dimensional model by adopting tools such as projection, impression and the like in three-dimensional design software, and combining the line segment grid and the engineering assembly three-dimensional model into a whole, wherein each vertex of the line segment grid becomes the vertex of the engineering assembly three-dimensional model, and the encryption of the vertex of the engineering assembly three-dimensional model is completed.
Step 3, exporting and importing the three-dimensional model vertex data: the three-dimensional model of the engineering assembly is scattered into line segments according to original coordinates in three-dimensional design software, after the line segments positioned on the bottom surface of the three-dimensional model of the engineering assembly are removed, the line segments are exported together with the projected encrypted grid line segments in the original format of a three-dimensional design platform (such as dgn format) or in the format of a third-party platform (such as dwg format), and then the line segments are imported into ArcGIS (geographic information platform).
Step 4, coordinate elevation extraction and DEM production of the three-dimensional model vertex: as shown in fig. 2, the method is: firstly, setting layer coordinates in Arcgis as projection coordinates adopted by engineering; then, converting the imported model format such as dgn or dwg into an ArcGIS native data format (such as shp and gdb); and finally, extracting the required engineering model surface vertex coordinate elevation data and producing the final DEM data in ArcGis through a set of spatial data analysis processing flow and method.
The spatial data analysis processing flow and the method are as follows:
s1, element breakpoint and turning point: converting each control folding point on a line segment and a multi-segment line into a point element by adopting an 'element folding point converting point' tool in ArcGIS;
s2, point element screening: brushing off point elements without elevation attribute fields, namely point elements of Z coordinate attribute fields by adopting a screening tool in ArcGis;
s3, adding an XY coordinate attribute field: adding an XY coordinate attribute field of the point element by adopting an 'adding XY coordinate' tool in ArcGis;
s4, point element fusion: adopting a 'fusion' tool in ArcGIS, simultaneously taking X coordinate and Y coordinate attribute fields as fusion fields, taking a Z coordinate attribute field as a statistical field, and taking the maximum value of the statistical type to complete the fusion processing of the point elements; after processing, point elements with the same X, Y coordinates are fused into one point element, and the elevation of the point element is the top elevation of the three-dimensional model, so that the problems of repetition of the same XY coordinate point elements and selection of the elevation of the point element are solved;
s5, transferring the terrain to a grid: and (3) converting point elements with X, Y projection coordinates and elevations after fusion processing into DEM grid data by using a 'terrain to grid' tool in ArcGis.
Claims (2)
1. A method for converting various BIM model data into DEM data is characterized in that: the method comprises the following steps:
step 1, preparation of a three-dimensional model and a platform: in a three-dimensional design platform, the advantages of three-dimensional design platform model assembly and high-precision coordinate positioning are exerted, an original terrain model, an engineering excavation backfill model, an engineering building model and a universal format three-dimensional model FBX, OBJ or 3DS are assembled together according to engineering design and a coordinate position, and an engineering final assembly three-dimensional model is completed;
step 2, encrypting the vertex of the three-dimensional model: in order to enable the vertex density of the three-dimensional model to meet the demand of DEM production, drawing a plurality of mutually perpendicular crossed line segments on an XY coordinate plane of the engineering assembly three-dimensional model in a three-dimensional design platform according to the demanded DEM grid resolution ratio to form a line segment grid to cover the range of the engineering assembly three-dimensional model, then covering the line segment grid on the surface of the engineering assembly three-dimensional model by adopting a projection and impression tool in three-dimensional design software, and combining the line segment grid and the engineering assembly three-dimensional model into a whole, so that each vertex of the line segment grid becomes the vertex of the engineering assembly three-dimensional model, and the encryption of the vertex of the engineering assembly three-dimensional model is completed;
step 3, exporting and importing the three-dimensional model vertex data: breaking up the three-dimensional model of the engineering assembly into line segments according to original coordinates in three-dimensional design software, removing the line segments positioned on the bottom surface of the three-dimensional model of the engineering assembly, leading out the line segments together with the projected encrypted grid line segments in the original format of a three-dimensional design platform or in the format of a third-party platform, and then leading the line segments into a geographic information platform ArcGIS;
and 4, step 4: firstly, setting layer coordinates in the geographic information platform ArcGis as projection coordinates adopted by engineering; then, converting the imported model format into an ArcGIS native data format; and finally, extracting the required engineering final assembly three-dimensional model surface vertex coordinate elevation data and producing final DEM data in a geographic information platform ArcGis through a set of spatial data analysis processing method.
2. The method for converting various BIM model data into DEM data as claimed in claim 1, wherein:
in step 4, in the geographic information platform ArcGis, the method for extracting the engineering assembly three-dimensional model vertex coordinate elevation and producing the final DEM data comprises the following steps:
s1, element breakpoint and turning point: converting each control folding point on a line segment and a multi-segment line into a point element by adopting an element folding point converting tool in the ArcGIS;
s2, point element screening: adopting a screening tool in ArcGis to brush off point elements without elevation attribute fields;
s3, adding an XY coordinate attribute field: adding an XY coordinate attribute field of the point element by adopting an 'adding XY coordinate' tool in ArcGis;
s4, point element fusion: adopting a 'fusion' tool in ArcGIS, simultaneously taking X coordinate and Y coordinate attribute fields as fusion fields, taking a Z coordinate attribute field as a statistical field, and taking the maximum value of the statistical type to complete the fusion processing of the point elements; after processing, point elements with the same X, Y coordinates are fused into one point element, and the elevation of the point element is the top elevation of the three-dimensional model;
s5, transferring the terrain to a grid: and (3) converting point elements with X, Y projection coordinates and elevations after fusion processing into DEM raster data by using a 'terrain to raster' tool in ArcGis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711347219.9A CN107992702B (en) | 2017-12-15 | 2017-12-15 | Method for converting various BIM model data into DEM data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711347219.9A CN107992702B (en) | 2017-12-15 | 2017-12-15 | Method for converting various BIM model data into DEM data |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107992702A CN107992702A (en) | 2018-05-04 |
| CN107992702B true CN107992702B (en) | 2021-02-05 |
Family
ID=62038727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711347219.9A Active CN107992702B (en) | 2017-12-15 | 2017-12-15 | Method for converting various BIM model data into DEM data |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107992702B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708587A (en) * | 2012-04-17 | 2012-10-03 | 中国地质大学（北京） | Method and system for acquiring three-dimensional building information rapidly |
| KR101336013B1 (en) * | 2012-12-07 | 2013-12-04 | 한국건설기술연구원 | System and method for connecting bim data and gis data |
| CN105701295A (en) * | 2016-01-14 | 2016-06-22 | 昆明安泰得软件股份有限公司 | Method for rapid integrated presentation of BIM model and three-dimensional geographical information system |
| CN105931294A (en) * | 2016-04-19 | 2016-09-07 | 西南交通大学 | Method for converting BIM entity model into multiple levels of details (LOD) GIS standardized model |
| CN106683183A (en) * | 2017-01-04 | 2017-05-17 | 重庆市勘测院 | Online three-dimensional visualization method for construction project model |
| CN106844977A (en) * | 2017-01-23 | 2017-06-13 | 重庆市勘测院 | A kind of town road BIM designs a model and GIS data integrated approach |
-
2017
- 2017-12-15 CN CN201711347219.9A patent/CN107992702B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708587A (en) * | 2012-04-17 | 2012-10-03 | 中国地质大学（北京） | Method and system for acquiring three-dimensional building information rapidly |
| KR101336013B1 (en) * | 2012-12-07 | 2013-12-04 | 한국건설기술연구원 | System and method for connecting bim data and gis data |
| CN105701295A (en) * | 2016-01-14 | 2016-06-22 | 昆明安泰得软件股份有限公司 | Method for rapid integrated presentation of BIM model and three-dimensional geographical information system |
| CN105931294A (en) * | 2016-04-19 | 2016-09-07 | 西南交通大学 | Method for converting BIM entity model into multiple levels of details (LOD) GIS standardized model |
| CN106683183A (en) * | 2017-01-04 | 2017-05-17 | 重庆市勘测院 | Online three-dimensional visualization method for construction project model |
| CN106844977A (en) * | 2017-01-23 | 2017-06-13 | 重庆市勘测院 | A kind of town road BIM designs a model and GIS data integrated approach |
Non-Patent Citations (3)
| Title |
|---|
| BIM与GIS集成的城市建筑规划审批系统设计与实现;彭雷;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20170215;C038-234 * |
| EarthEnv-DEM90: A nearly-global, void-free, multi-scale smoothed, 90m digital elevation model from fused ASTER and SRTM data;Natalie Robinson,at al;《ISPRS Journal of Photogrammetry and Remote Sensing 87 (2014)》;20131128;正文第57-67页 * |
| 工程管理全信息化条件下DEM与BIM;叶国仁 等;《智能城市》;20160725;正文第142-144页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107992702A (en) | 2018-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108052776B (en) | Flood model construction and dynamic display method based on BIM and three-dimensional live-action model | |
| CN104766366B (en) | A kind of method for building up of three-dimension virtual reality demonstration | |
| CN110728752A (en) | Construction method of three-dimensional terrain scene model of road | |
| CN108108575B (en) | High-precision engineering three-dimensional terrain manufacturing method based on BIM (building information modeling) cross-platform technology | |
| CN108108563B (en) | Cross-platform hydrodynamics modeling method based on BIM and GIS technology | |
| US20230074265A1 (en) | Virtual scenario generation method and apparatus, computer device and storage medium | |
| CN101154313A (en) | Three-dimensional simulation digital information navigation channel system and its implementing method | |
| KR101659780B1 (en) | Method for Representing Global Spherical Space of 2 Dimentional Drawing data in GIS | |
| CN110532719A (en) | A kind of construction site Method of Earthwok Calculation and device | |
| CN111199066A (en) | Construction site virtual construction restoration method based on BIM + GIS | |
| CN116502317B (en) | Water conservancy and hydropower engineering multisource data fusion method and terminal equipment | |
| CN105354882A (en) | Method for constructing big data architecture based three-dimensional panoramic display platform for large-spatial-range electricity transmission | |
| CN106875330B (en) | Method for rotating plane model into spherical model | |
| CN102750722A (en) | Method and system for generating motion model track | |
| CN114399406A (en) | Water conservancy project multi-user cooperative management system and method based on GIS and BIM | |
| CN115098934A (en) | Cement mixing pile management system based on GIS and BIM and construction method thereof | |
| CN111667569A (en) | Three-dimensional real-scene earthwork visual accurate measuring and calculating method based on Rhino and Grasshopper | |
| CN106023311B (en) | Improve the method that dimensional topography generates precision | |
| CN113223164B (en) | Large-terrain data batch processing method | |
| KR100732915B1 (en) | Method for three-dimensional determining of basic design road route using digital photommetry and satellite image | |
| CN113052965A (en) | Three-dimensional terrain reconstruction method | |
| CN107992702B (en) | Method for converting various BIM model data into DEM data | |
| KR100490670B1 (en) | Fabricating method of cubic map for mountains | |
| CN114399405A (en) | Large-scale hydraulic engineering management method and system based on GIS and BIM | |
| CN112648974B (en) | Engineering quantity calculation method based on aerial three-dimensional image data |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |