The invention discloses a method utilizing the 3D laser scanning technology to realize rapid BIM modeling. The method comprises steps that a data acquisition step, field scanning is carried out through utilizing a three-dimensional laser scanner, integral and real original data of a designated structure engineering target is acquired, and point cloud data having the accurate space information is acquired; a point cloud data pre-processing step, splicing, de-noising, classification and color processing of the acquired three-dimensional laser point cloud data are carried out through utilizing point cloud pre-processing software; BIM model construction is carried out; model application management is carried out. The method is advantaged in that rapid, accurate and batch BIM modeling is carried out through utilizing the 3D laser scanning technology, data bulk of artificial field repetition measurement can be reduced to a maximum degree, modeling precision and efficiency are improved, resources are reasonably utilized, a problem of inconvenience in traditional BIM modeling is solved, and high-precision and high-efficiency BIM modeling is realized.

Method utilizing 3D laser scanning technology to realize rapid BIM modeling

The present invention relates to a point cloud compression storage method and system, belongs to the technical field of GIS information, and in particular to a three-dimensional point cloud compression storage method and system based on spatial-temporal data fusion. According to the technical scheme of the present invention, by changing the storage format of the point cloud data and combining theidea of storing the multi-point point cloud data in a grid, the point cloud data with same position information at different times are fused and stored in an integrative manner, so that compression storage of multi-version data of the same geometric object at the same area is implemented, the storage efficiency of massive point cloud data can be effectively improved and the storage space can be saved; and at the same time, the fusion and integrated compression storage of the three-dimensional point cloud can also provide the assistance and the reference for other spatial-temporal data with three-dimensional attributes.

Three-dimensional point cloud compression storage method and system based on spatial-temporal data fusion

The invention belongs to the technical field of computer information, and specifically relates to a method and a device for storing point cloud data. The method for storing point cloud data comprises: calculating a bounding box of the point cloud data; according to an octree structure, performing recursion segmentation on the bounding box, each hierarchy of the octree structure being corresponding to a dot pitch; after segmentation of each time, according to the dot pitch of a current hierarchy, determining whether points in each subcell space obtained by segmentation belong to the current hierarchy, storing information of the points which belong to the current hierarchy in a file form, wherein each subcell space obtained by segmentation is corresponding to a node in the current hierarchy, and each node is corresponding to a file. The method and the device for storing point cloud data reduce storage size of point cloud data, improve reading, query, and rendering efficiency of the point cloud data.

Method and device for storing point cloud data

An embodiment of the invention provides a cloud-based three-dimensional map generation method, device, equipment and application. The cloud-based three-dimensional map generation method comprises thefollowing steps: acquiring a first point cloud set and a second point cloud set acquired from partial exterior wall contour of the same building; establishing an optimization function of the data according to the preset mapping relation between the coordinate system of the first point cloud set and the coordinate system of the second point cloud set and corresponding points; acquiring the optimalsolution of the mapping relation according to the optimization function; and generating a real-scene three-dimensional map of corresponding part of the building according to the optimal solution and the second point cloud set and the first point cloud set. By adopting the scheme of the invention, unity between an indoor real-scene three-dimensional map and an outdoor GPS geographic coordinate system can be implemented, high-precision fusion of indoor and outdoor three-dimensional maps is realized, and indoor and outdoor real-scene three-dimensional maps with unified indoor and outdoor coordinate systems are generated.

Cloud-based three-dimensional map generation method, device, equipment and application

The invention provides a section design method and device for an irrigation and drainage dual-purpose channel, and equipment. The section design method for the irrigation and drainage dual-purpose channel comprises the following steps that: S10: calculating the drainage ability of the channel so as to judge whether the drainage requirements of the irrigation and drainage dual-purpose channel are met or not; S20: when the channel can not meet the drainage requirements of the irrigation and drainage dual-purpose channel, regulating the channel bottom elevation and the design water level of the channel to enable the channel to meet the drainage requirements of the irrigation and drainage dual-purpose channel; and S30: on the basis of the regulated channel bottom elevation, designing the section dimension of the irrigation and drainage dual-purpose channel to enable the flow and the water level of the channel to meet the irrigation requirements. According to the section design method, which is disclosed by the embodiment of the invention, for the irrigation and drainage dual-purpose channel, the existing channel is transformed into the irrigation and drainage dual-purpose channel, andthe section of the irrigation and drainage dual-purpose channel is designed in a transformation process so as to guarantee the irrigation requirements of an irrigation area to a maximum degree in a most economical way.

Section design method and device for irrigation and drainage dual-purpose channel, and equipment

The invention discloses a laser point cloud data management method based on octree and three-dimensional R star tree integration. According to the mass point cloud data management method, the rapid convergence capacity of an octree in a three-dimensional space and the advantage that a three-dimensional R star tree is stable in performance on irregularly-distributed multi-dimensional point data are fully combined. The method comprises the steps that octree partitioning is conducted on laser point cloud data, the three-dimensional R star tree is constructed for leaf nodes of the octree, and then a 3DOR star tree index structure is constructed; characteristic analysis is conducted on the laser point cloud data, a laser point cloud data storage structure based on the 3DOR star tree is constructed, and then laser point cloud storage and management based on the 3DOR star tree is achieved. According to the method, the laser point cloud data storage structure based on the 3DOR star tree has the advantages of efficient spatial storage and query and the like compared with other tree structures, and a technical support can be provided for mass laser point cloud data storage, management and analytical application.

Laser point cloud data management method based on octree and three-dimensional R star tree integration

The invention discloses a building three-dimensional laser point cloud feature extraction method based on the assistance of three-dimensional laser scanning system/digital camera images. A three-dimensional laser scanning system and a digital camera are adopted to obtain building three-dimensional laser point cloud data and obtain three-dimensional laser scanning system/digital camera high-resolution image data; building three-dimensional laser point cloud is precisely registered with three-dimensional laser scanning system/digital camera images, so that the corresponding relations of three-dimensional laser points and image pixels in the space can be obtained; an LSD (line segment detector) algorithm is adopted to carry out feature extraction on the image data, so that a building image feature graph can be obtained; feature extraction is performed on the building three-dimensional laser point cloud; optimization processing is performed on extracted initial three-dimensional laser point cloud features based on an RANSCA (random sample consensus) algorithm; and building three-dimensional laser point cloud features can be obtained. With the building three-dimensional laser point cloud feature extraction method of the invention adopted, the fine degree and accuracy of three-dimensional laser point cloud feature extraction can be improved, the construction of a building model can be favored, and more practical problems in the production field can solved. The method of the invention has a great theoretical reference value for the development of digital urbanization and the construction of a BIM (building information model).

Building three-dimensional laser point cloud feature extraction method based on assistance of three-dimensional laser scanning system/digital camera images

The invention provides a farmland consolidation plan intelligent design method supported by GeoDesign. GIS, data mining, knowledge discovery and other technologies are comprehensively applied based on a geographic design idea, to carry out geography abstraction and extraction and representation of relevant knowledge rules on farmland consolidation engineering, thus completing parameterization setting of a farmland irrigation subsystem, a hydraulic construction subsystem and a road and protection forest subsystem in a farmland consolidation plan; furthermore, a uniform organization and management method for geographic object space relation, orientation information, attribute information, design parameter and knowledge rules of the farmland consolidation engineering is explored, so that intelligent design of a farmland consolidation plan is realized; on the basis of the intelligent design, GIS space inquiry, space analysis and three-dimensional modeling technologies are comprehensively used, so that three-dimensional modeling, three-dimensional visual analysis and other operations of the farmland consolidation planning engineering are realized. According to the method, the efficiency of the farmland consolidation planning and design can be effectively improved, and a technical support and a decision basis can be provided for efficient utilization of farmland resources, farmland informatization management and precise agriculture.

Farmland consolidation plan intelligent design method supported by GeoDesign

Popular Tasks used by Researchers

How can I help with your research?

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

We encountered an error while loading the panel. Please try refreshing the page.

Something went wrong

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

Anyone with the link can view this chat. You can switch it back to private anytime.

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Wang Yongzhi

Author Tools

Chat about Author

Papers

Laser point cloud data management method based on octree and three-dimensional R star tree integration

Building three-dimensional laser point cloud feature extraction method based on assistance of three-dimensional laser scanning system/digital camera images

Farmland consolidation plan intelligent design method supported by GeoDesign