CN111552893A - Method, plug-in and system for realizing online loading of multi-source geographic information data in AutoCAD - Google Patents
Method, plug-in and system for realizing online loading of multi-source geographic information data in AutoCAD Download PDFInfo
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Abstract
The invention discloses a method, a plug-in and a system for realizing online loading of multisource geographic information data in AutoCAD, wherein the method enables the AutoCAD to be connected with a network server which issues GIS service through the plug-in, and can online load required multisource geographic information data when drawing in the AutoCAD, thereby realizing flexible application of multisource geographic information data, saving the storage space of a local computer, saving the copying time of the data, improving the use efficiency and operability of the data, being beneficial to sharing and management of the data, configuring access authority in the network server and improving the safety of the data.
Description
Technical Field
The invention belongs to a data loading technology, and particularly relates to a method, a plug-in and a system for realizing online loading of multi-source geographic information data in AutoCAD.
Background
The multi-source geographic information data mainly includes Digital topographic Map data, DOM (Digital ortho Map), DSM (Digital Surface Model), DEM (Digital elevation Model), DRG (Digital grid Map), laser point cloud data, pipe network, three-dimensional Model, and the like. With the expansion of project application range, especially the improvement of resolution (fineness), the data volume of multi-source geographic information data is increasing in geometric progression, and a series of problems are brought to production and application. These difficulties are mainly manifested in:
(1) data storage: the large-area high-resolution multi-source geographic information has the advantages that the data volume is few hundreds of TB when the data volume is small, and the storage occupies space and takes time for copying when the data volume is more calculated by PB (positive displacement), so that the problem is brought to data storage management, especially multi-client application;
(2) data application: in the face of mass multi-source geographic information data achievements, common engineering software is difficult to organize, schedule, store and apply, large and good resources cannot be effectively utilized, so that not only is resource waste caused, but also adverse effects are brought to the development of downstream work;
(3) data security: the multi-client copies and uses multi-source geographic information data results, so that the efficiency is low, the operability is poor, the leakage risk of the results is increased, and the confidential management of the results is not facilitated;
(4) data sharing: and multiple client copies are used, and are stored dispersedly, so that data updating and data sharing management are not utilized.
The existing design based on AutoCAD adopts an off-line mode to open multi-source geographic information data in a local computer, and then performs related design such as related roads, houses, pipelines, plants, construction and the like, which brings huge tests and pressure to data safety, data storage, data application, data organization and data sharing, and especially in related design of large regional project scope, the problems are more prominent.
WebGIS (network geographic information system) refers to GIS working on a Web network, is extension and development of the traditional GIS on the network, has the characteristics of the traditional GIS, can realize GIS basic functions of retrieval, query, drawing output, editing and the like of spatial data, is also a foundation for geographic information publishing, sharing and communication cooperation on the Internet, and can publish multi-source geographic information data as private cloud so as to be convenient for storage, application and sharing of the multi-source geographic information data.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method, a plug-in and a system for realizing online loading of multi-source geographic information data in AutoCAD (auto computer aided design), so as to solve the problems of difficult data storage, application and sharing and the like caused by huge data volume of the multi-source geographic information data.
The invention solves the technical problems through the following technical scheme: a method for realizing online loading of multi-source geographic information data in AutoCAD comprises the following steps:
step 1: building a network server, and configuring corresponding software and hardware firewalls and access permissions;
step 2: issuing, on the network server, a multi-source geographic information data (GIS) service conforming to an OGC standard (Open geographic consistency);
and step 3: in AutoCAD, a plug-in is developed secondarily through an AutoCAD bottom layer source code, and the plug-in accesses the multi-source geographic information data GIS service on the network server to realize online loading of the WebGIS service.
The method of the invention enables the AutoCAD to be connected with the network server which issues the multi-source geographic information data GIS service through the plug-in, the required multi-source geographic information data can be loaded on line when drawing is carried out in the AutoCAD, the flexible application of the multi-source geographic information data is realized, the large-capacity multi-source geographic information data does not need to be stored on the local computer provided with the AutoCAD, the storage space of the local computer is saved, the copying time of the data is saved, the use efficiency and the operability of the data are improved, the data sharing and management are facilitated, the access authority is configured on the network server, and the safety of the data is improved.
Further, in step 2, the issuing step of the multi-source geographic information data GIS service is as follows:
step 2.1: uniformly converting the multi-source geographic information data into a WG84 global coordinate system;
step 2.2: grading and tile partitioning the multi-source geographic information data on the network server;
step 2.3: and issuing the multi-source geographic information data GIS service to obtain a corresponding data access address.
By grading and partitioning the data, the storage and use efficiency of the multi-source geographic information data is improved.
Further, in the step 2.2, the multi-source geographic information data is graded and tile-partitioned by using hypergraph I-server software.
Further, in step 3, the online loading specifically includes:
step 3.1: the plug-in sends an access request to a network server, wherein the access request comprises a coordinate range corresponding to the current AutoCAD drawing interface and request parameter information of a corresponding level;
step 3.2: the network server acquires the corresponding coordinate range and the tile data of the corresponding level in the multi-source geographic information data GIS service according to the access request and returns the tile data to the plug-in;
step 3.3: the plug-in receives the returned tile data, establishes a folder according to the hierarchy of the tile data, converts the tile data into a target coordinate system and temporarily caches the converted tile data in the folder;
step 3.4: reading tile data cached in a folder, automatically loading the tile data, and automatically registering the data to a coordinate system of AutoCAD according to geographic information in the data;
step 3.5: and (3) repeating the steps 3.1-3.4 in real time according to the change of the drawing interface of the AutoCAD, so as to realize online loading.
Further, the request parameter information includes a current data range, a current scale, and a current resolution.
The invention also provides a plug-in, which is applied to AutoCAD software, the AutoCAD software is connected with a network server which issues multisource geographic information data GIS service through the plug-in, and the plug-in comprises:
the user interface module is used for receiving an operation instruction sent by a user;
the background acquisition module is used for acquiring the request parameter information of the coordinate range and the corresponding level corresponding to the current AutoCAD drawing interface according to the operation instruction and sending an access request to the network server, wherein the access request comprises the request parameter information;
the data receiving module is used for receiving the tile data of the corresponding coordinate range and the corresponding level in the multi-source geographic information data GIS service returned by the network server according to the access request;
a data processing module; the system comprises a file folder, a target coordinate system and a database, wherein the file folder is established according to the hierarchy of returned tile data, and the tile data is converted into the target coordinate system and then temporarily cached in the file folder;
and the loading and registering module is used for reading the tile data cached in the folder, automatically loading the tile data, and automatically registering the data to the coordinate system of the AutoCAD according to the geographic information in the data.
The invention also provides a system for realizing the online loading of the multi-source geographic information data in the AutoCAD, which comprises a network server and a client side provided with the AutoCAD; the network server issues multi-source geographic information data GIS service meeting OGC standard, a plug-in is arranged in AutoCAD on the client, the AutoCAD is connected with the network server through the plug-in, and the plug-in comprises:
the user interface module is used for receiving an operation instruction sent by a user;
the background acquisition module is used for acquiring the request parameter information of the coordinate range and the corresponding level corresponding to the current AutoCAD drawing interface according to the operation instruction and sending an access request to the network server, wherein the access request comprises the request parameter information;
the data receiving module is used for receiving the tile data of the corresponding coordinate range and the corresponding level in the multi-source geographic information data GIS service returned by the network server according to the access request;
a data processing module; the system comprises a file folder, a target coordinate system and a database, wherein the file folder is established according to the hierarchy of returned tile data, and the tile data is converted into the target coordinate system and then temporarily cached in the file folder;
the loading and registering module is used for reading the tile data cached in the folder and automatically loading the tile data; and automatically registering the data to the coordinate system of the AutoCAD according to the geographic information in the data.
Advantageous effects
Compared with the prior art, the method for realizing the online loading of the multisource geographic information data in the AutoCAD enables the AutoCAD to be connected with a network server which issues the multisource geographic information data GIS service through a plug-in, can load the required multisource geographic information data online when drawing in the AutoCAD, realizes the flexible application of the multisource geographic information data, does not need to store large-capacity multisource geographic information data on a local computer provided with the AutoCAD, saves the storage space of the local computer, saves the copying time of the data, improves the use efficiency and the operability of the data, is beneficial to the sharing and the management of the data, configures the access authority in the network server, and improves the safety of the data.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a block diagram of a network architecture of a system in an embodiment of the invention.
Detailed Description
The technical solutions in the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for realizing online loading of multi-source geographic information data in AutoCAD, which comprises the following steps:
1. a network server is built in an enterprise or a company intranet, and a corresponding software and hardware firewall and access authority are configured, as shown in fig. 1.
2. And issuing WMS (WebMap Service) or WMTS (Web Map Title Service) in the multi-source geographic information data GIS Service meeting the OGC standard on a network server.
The OGC is called Open Geospatial Consortium (Open Geospatial Consortium), is a non-profit international standard organization, and establishes an interface specification for spatial data interoperability through an international standard organization or a technical Consortium, and a GIS manufacturer develops a read-write function of spatial data conforming to the interface specification, so as to implement the interoperability of a heterogeneous spatial database.
The WMS service is to make a map using data having geospatial location information, wherein the map is defined as a visual representation of geographic data, and can return a corresponding map including a grid form such as PNG, GIF, JPEG, or the like, or a vector form such as SVG or WEB CGM, according to a request of a user. WMS supports HTTP protocol, and the supported operation is determined by URL.
The WMS provides the following operations:
GetCapabitities: service level metadata is returned, which is a description of the service information content and the requirements parameters.
GetMap: returning a map image whose geospatial reference and size parameters are well defined.
GetFeatureInfo: information is returned for certain special elements displayed on the map.
GetLegendGraphic: the legend information for the map is returned.
WMTS provides a standardized solution for publishing digital map services using predefined tile methods. WMTS makes up for the disadvantage that WMS cannot provide a block map. WMS is an ideal solution for dynamic data or user-customized maps (combined with SLD standard) for providing customizable maps. WMTS sacrifices the flexibility of providing customized maps, and instead enhances scalability by providing static data (base maps) whose range boxes and scales are defined within individual tiles. These fixed tile sets allow for implementation of WMTS services using a Web server that simply returns existing files, while allowing scalability with some standard network mechanisms such as distributed caching.
The WMTS interface supports three types of resources:
a service metadata (ServiceMetadata) resource (response to GetCapabilities operations in the process-oriented architecture style) (server side must implement). The ServiceMetadata resource describes the capabilities of the specified server implementation and the information contained. This operation also supports standard version negotiation between the client and the server in a process-oriented architecture style.
Tile resources (response to GetTile operations in the procedural architecture style) (server side must implement). The tile resource represents a small block of the map representation of a layer.
Element information (featurelnfo) resource (response to getfeaturelnfo operation in the process architecture style) is (server side alternative implementation). The resource provides information of the ground feature elements at a specific pixel position in the map block, similar to the behavior of GetFeatureInfo operation in WMS, relevant information is returned in text form by providing, for example, thematic attribute names and values thereof
The method comprises the following steps of releasing WMS or WMTS in the multi-source geographic information data GIS service:
2.1 unified conversion of multi-source geographic information data to the WG84 global coordinate system.
2.2 the multi-source geographic information data is graded at 21 level and partitioned into tiles by using hypergraph I-server software on a network server.
The tile is a small picture or data cut according to a certain rule and a scale, the tile map pyramid model is a multi-resolution hierarchical model, the resolution is lower from the bottom layer to the top layer of the tile pyramid, and the represented geographical range is unchanged. Firstly, determining the number N of zoom levels to be provided by a map service platform, taking a map picture with the highest zoom level and the largest map scale as the bottom layer of a pyramid, namely a 0 th layer (or level), partitioning the map picture, cutting the map picture from the left upper corner of the map picture from left to right and from top to bottom, and dividing the map picture into square map tiles with the same size (such as 256 multiplied by 256 pixels) to form a 0 th layer tile matrix; on the basis of the map picture of the 0 th layer, generating the map picture of the 1 st layer by a method of synthesizing one pixel by every 2 multiplied by 2 pixels, partitioning the map picture, and dividing the map picture into square map tiles with the same size as the next layer to form a tile matrix of the 1 st layer; generating a layer 2 tile matrix by the same method; … …, respectively; this continues until the (or level) of N-1, the entire tile pyramid is constructed.
Massive multi-source geographic information data are subjected to hierarchical partitioning processing (or hierarchical partitioning) by using a WebGIS technology, so that the storage and use efficiency of the multi-source geographic information data is improved.
2.3 issuing WMS or WMTS to obtain corresponding data access address.
The release of WMS or WMTS on GIS Server is prior art, and for the example of WMS service release on super graph I-Server, reference is made to the detailed steps given by https:// zhuanlan.
By adopting a distributed storage technology and a Server distribution technology, the data is uniformly stored, uniformly managed and shared, so that repeated copying is avoided, the data safety is ensured, and the utilization efficiency of the multisource geographic information data is improved; the method is characterized in that a Server service interface is utilized to realize the use of multiple clients based on AutoCAD software, and the clients comprise a mobile terminal, a personal PC terminal and a mobile PC terminal.
3. In AutoCAD, a plug-in is developed secondarily through an underlying source code of the AutoCAD, and online loading of WebGIS service is realized by accessing a secondary development port API (Application Programming Interface) of the GIS service on a network server through the plug-in. The detailed steps of online loading include:
and 3.1, the plug-in sends an access request to the network server, wherein the access request comprises the coordinate range corresponding to the current AutoCAD drawing interface and the request parameter information of the corresponding layer (for example, the layer corresponding to the current AutoCAD drawing interface is 18 layers). The request parameter information comprises a data range, a current scale and a current resolution of the current AutoCAD drawing interface, wherein the data range is used for determining the contained tile blocks according to a coordinate range corresponding to the AutoCAD drawing interface.
And 3.2, the network server acquires the corresponding coordinate range and the tile data (tile data of 18 levels) of the corresponding level in the WMS or WMTS of the multi-source geographic information data GIS service according to the access request and returns the tile data to the plug-in.
And 3.3, the plug-in receives the returned tile data, establishes a folder according to the hierarchy of the tile data, converts the tile data into a target coordinate system, and temporarily caches the converted tile data in the folder (the folder is stored on the client side provided with the AutoCAD). And temporarily caching tile data of different levels in corresponding folders, wherein the data contains geographical reference information.
And 3.4, reading the tile data cached in the folder, automatically loading the tile data, and automatically registering the tile data to the coordinate system of the AutoCAD according to the geographic reference information in the data.
3.5, repeating the steps 3.1-3.4 in real time according to the change (scale change, coordinate movement, drawing window change and the like) of the drawing interface of the AutoCAD, and realizing online loading. In AutoCAD, various related professional designs can be performed based on the online multi-source geographic information data, so that the design period is effectively shortened, and distributed storage, online release and multi-client sharing application of the multi-source geographic information data are realized.
The invention also provides a plug-in, which is applied to AutoCAD software, the AutoCAD software is connected with a network server which issues multisource geographic information data GIS service through the plug-in, and the plug-in comprises:
the user interface module is used for receiving an operation instruction sent by a user; the operation instruction is an event corresponding to the operation of a mouse or a keyboard by a user;
the background acquisition module is used for acquiring the request parameter information of the coordinate range and the corresponding level corresponding to the current AutoCAD drawing interface according to the operation instruction and sending an access request to the network server, wherein the access request comprises the request parameter information;
the data receiving module is used for receiving the tile data of the corresponding coordinate range and the corresponding level in the multi-source geographic information data GIS service returned by the network server according to the access request;
a data processing module; the system comprises a file folder, a target coordinate system and a database, wherein the file folder is established according to the hierarchy of returned tile data, and the tile data is converted into the target coordinate system and then temporarily cached in the file folder;
and the loading and registering module is used for reading the tile data cached in the folder, automatically loading the tile data, and automatically registering the data to the coordinate system of the AutoCAD according to the geographic information in the data.
As shown in fig. 1, the present invention further provides a system for implementing online loading of multi-source geographic information data in AutoCAD, including a network server and a client installed with AutoCAD; the network server issues multi-source geographic information data GIS service meeting OGC standard, a plug-in is arranged in AutoCAD on the client, the AutoCAD is connected with the network server through the plug-in, and the plug-in comprises:
the user interface module is used for receiving an operation instruction sent by a user;
the background acquisition module is used for acquiring the request parameter information of the coordinate range and the corresponding level corresponding to the current AutoCAD drawing interface according to the operation instruction and sending an access request to the network server, wherein the access request comprises the request parameter information;
the data receiving module is used for receiving the tile data of the corresponding coordinate range and the corresponding level in the multi-source geographic information data GIS service returned by the network server according to the access request;
a data processing module; the system comprises a file folder, a target coordinate system and a database, wherein the file folder is established according to the hierarchy of returned tile data, and the tile data is converted into the target coordinate system and then temporarily cached in the file folder;
the loading and registering module is used for reading the tile data cached in the folder and automatically loading the tile data; and automatically registering the data to the coordinate system of the AutoCAD according to the geographic information in the data.
The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or modifications within the technical scope of the present invention, and shall be covered by the scope of the present invention.
Claims (8)
1. A method for realizing online loading of multi-source geographic information data in AutoCAD is characterized by comprising the following steps:
step 1: building a network server, and configuring corresponding software and hardware firewalls and access permissions;
step 2: issuing multisource geographic information data GIS service meeting OGC standard on the network server;
and step 3: in AutoCAD, a plug-in is developed secondarily through an AutoCAD bottom layer source code, and the plug-in accesses the multi-source geographic information data GIS service on the network server to realize online loading of the WebGIS service.
2. The method of claim 1, wherein: in the step 2, the issuing step of the multi-source geographic information data GIS service is as follows:
step 2.1: uniformly converting the multi-source geographic information data into a WG84 global coordinate system;
step 2.2: grading and tile partitioning the multi-source geographic information data on the network server;
step 2.3: and issuing the multi-source geographic information data GIS service to obtain a corresponding data access address.
3. The method of claim 2, wherein: in the step 2.2, multi-source geographic information data is graded and tile-partitioned by using hypergraph I-server software.
4. The method of claim 1, wherein: in step 3, the online loading specifically includes:
step 3.1: the plug-in sends an access request to a network server, wherein the access request comprises a coordinate range corresponding to the current AutoCAD drawing interface and request parameter information of a corresponding level;
step 3.2: the network server acquires the corresponding coordinate range and the tile data of the corresponding level in the multi-source geographic information data GIS service according to the access request and returns the tile data to the plug-in;
step 3.3: the plug-in receives the returned tile data, establishes a folder according to the hierarchy of the tile data, converts the tile data into a target coordinate system and temporarily caches the converted tile data in the folder;
step 3.4: reading tile data cached in a folder, automatically loading the tile data, and automatically registering the data to a coordinate system of AutoCAD according to geographic information in the data;
step 3.5: and (3) repeating the steps 3.1-3.4 in real time according to the change of the drawing interface of the AutoCAD, so as to realize online loading.
5. The method of claim 4, wherein: the request parameter information includes a current data range, a current scale, and a current resolution.
6. An insert, characterized by: the method is applied to AutoCAD software, the AutoCAD software is connected with a network server which issues multi-source geographic information data (GIS) service through the plug-in, and the plug-in comprises the following steps:
the user interface module is used for receiving an operation instruction sent by a user;
the background acquisition module is used for acquiring the request parameter information of the coordinate range and the corresponding level corresponding to the current AutoCAD drawing interface according to the operation instruction and sending an access request to the network server, wherein the access request comprises the request parameter information;
the data receiving module is used for receiving the tile data of the corresponding coordinate range and the corresponding level in the multi-source geographic information data GIS service returned by the network server according to the access request;
a data processing module; the system comprises a file folder, a target coordinate system and a database, wherein the file folder is established according to the hierarchy of returned tile data, and the tile data is converted into the target coordinate system and then temporarily cached in the file folder;
and the loading and registering module is used for reading the tile data cached in the folder, automatically loading the tile data, and automatically registering the data to the coordinate system of the AutoCAD according to the geographic information in the data.
7. The insert of claim 6, wherein: the request parameter information includes a current data range, a current scale, and a current resolution.
8. A system for realizing online loading of multi-source geographic information data in AutoCAD is characterized in that: the system comprises a network server and a client installed with an AutoCAD; the network server issues multi-source geographic information data GIS service meeting OGC standard, a plug-in is arranged in AutoCAD on the client, the AutoCAD is connected with the network server through the plug-in, and the plug-in comprises:
the user interface module is used for receiving an operation instruction sent by a user;
the background acquisition module is used for acquiring the request parameter information of the coordinate range and the corresponding level corresponding to the current AutoCAD drawing interface according to the operation instruction and sending an access request to the network server, wherein the access request comprises the request parameter information;
the data receiving module is used for receiving the tile data of the corresponding coordinate range and the corresponding level in the multi-source geographic information data GIS service returned by the network server according to the access request;
a data processing module; the system comprises a file folder, a target coordinate system and a database, wherein the file folder is established according to the hierarchy of returned tile data, and the tile data is converted into the target coordinate system and then temporarily cached in the file folder;
and the loading and registering module is used for reading the tile data cached in the folder, automatically loading the tile data, and automatically registering the data to the coordinate system of the AutoCAD according to the geographic information in the data.
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