CN101702020B - Method and device for obtaining remotely sensed data based on grids - Google Patents
Method and device for obtaining remotely sensed data based on grids Download PDFInfo
- Publication number
- CN101702020B CN101702020B CN 200910236445 CN200910236445A CN101702020B CN 101702020 B CN101702020 B CN 101702020B CN 200910236445 CN200910236445 CN 200910236445 CN 200910236445 A CN200910236445 A CN 200910236445A CN 101702020 B CN101702020 B CN 101702020B
- Authority
- CN
- China
- Prior art keywords
- remotely
- sensed data
- node
- grid
- service
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The invention provides a method and a device for obtaining remotely sensed data based on grids. The method comprises the following steps of: receiving an inquiring request sent by a request module through a source catalog service of a local node; according to inquiring conditions in the inquiring request, obtaining a physical address of a target node of the remotely sensed data meeting the inquiring conditions, and returning the physical address to the request module, wherein the inquiring conditions at least comprise part metadata information of the remotely sensed data; receiving a downloading request sent by the request module; and according to the downloading request, starting a document transmission service of the local node and the target node to transmit the remotely sensed data, wherein the downloading request at least carries the physical address of the local node and the physical address of the target node. The device comprises an obtaining module, a request module, a starting module and a receiving module. The invention provides the method and the device for obtaining the remotely sensed data based on grids, realizing the share of the remotely sensed data and simultaneously solving the problems of the safety, the heterogeneity and the distribution in the share process of the remotely sensed data.
Description
Technical field
The embodiment of the invention relates to network technology, relates in particular to a kind of acquisition methods and device of the remotely-sensed data based on grid.
Background technology
As a kind of fundamental spatial information resource, remotely-sensed data is widely used in the industry-by-industries such as land resources, meteorology, environment, water conservancy, mineral products, electric power.And along with the develop rapidly of aeronautical and space technology, sensing technology, database technology, the spatial resolution of satellite remote sensing images, spectral resolution and temporal resolution improve greatly, and remotely-sensed data increases with surprising rapidity.The remotely-sensed data of sharp increase provides basic condition in the applied research for various fields, and for people analyze, deal with problems when new way is provided, himself characteristic has been brought stern challenge to practical application again.
The data type of remote sensing image processing is complicated, data volume is huge, and is distributed on the heterogeneous storage devices of geographic position dispersion.And owing to reasons such as trade system, history, technology, these memory devices have separately different software and hardware management platform, way to manage and access mode, data deficiency on each memory device flows, and lacks between the system alternately, has formed so-called " information island ".One side part Study mechanism and individual are difficult to obtain needed remote sensing image data and carry out applied research; A large amount of valuable remotely-sensed datas are left unused to be close to the mode of throwing aside on the other hand.In order to help all types of user effectively to search, obtain and use remotely-sensed data, in the urgent need to a kind of platform remotely-sensed data resource integrated existing all kinds of distributions, isomery, eliminate " information island ".
The existing mode of sharing the remotely-sensed data resource mainly contains three kinds: the one, provide data query and exchange files with the metadata form; The 2nd, use Web service and set up remotely-sensed data resource sharing service; Three are based on remotely-sensed data resource sharing and the interoperability of open system.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: the mode that realizes the remotely-sensed data resource sharing based on metadata, data directly are exposed on the network during distributing data path on network, there is very large problem in data security; Web-based services is realized the mode of remotely-sensed data resource sharing, although improved the operability of Remote Sensing Database system, this type systematic is the data resource of integrated various isomeries effectively; Mode based on the resource sharing of open system realization remotely-sensed data needs the user that access software and host software are installed simultaneously, and will move simultaneously just and can finish the data interoperation process, has increased the cost of the shared remotely-sensed data resource of user.
Summary of the invention
The embodiment of the invention provides a kind of acquisition methods and device of the remotely-sensed data based on grid, in order to realize sharing of remotely-sensed data, solves simultaneously security, isomerism, distributivity problem in the Sharing of remote sensing data process.
The embodiment of the invention provides a kind of acquisition methods of the remotely-sensed data based on grid, comprising:
The query requests that the Resource TOC service reception request module of local node sends;
The Resource TOC service of local node is according to the querying condition in the described query requests, obtain the physical address of the destination node at the remotely-sensed data place of satisfying querying condition, and returning to the described request module, described querying condition comprises the part metadata information of described remotely-sensed data at least;
The download request that the Resource TOC service reception described request module of local node sends;
The Resource TOC service of local node is carried out remote sensing data transmission according to described download request startup is local node with file transfer services described destination node, described download request carries local node physical address and described destination node physical address at least, the acquisition methods of local node physical address is in the described download request: the described request module sends in the described download request process, when specifying the deposit position of local node, obtain the local node physical address according to described deposit position.
The embodiment of the invention provides a kind of deriving means of the remotely-sensed data based on grid, comprising:
Request module is used for sending query requests or download request;
Receiver module is used for receiving described query requests or the described download request that the described request module sends;
Acquisition module, querying condition for the described query requests that receives according to described receiver module, obtain the physical address of the destination node at the remotely-sensed data place of satisfying described querying condition, and returning to the described request module, described querying condition comprises the part metadata information of described remotely-sensed data at least;
Start module, be used for starting local node and file transfer services described destination node according to the described download request that described receiver module receives, carry out remote sensing data transmission, described download request carries local node physical address and described destination node physical address at least, the physical address of local node is that the described request module sends in the described download request process in the described download request, when specifying the deposit position of local node, obtain according to described deposit position.
Acquisition methods and the device based on the remotely-sensed data of grid of the embodiment of the invention under grid environment, carry out unified management by the Resource TOC service on each node to the remotely-sensed data distributed, isomerism of all nodes, realize sharing of remotely-sensed data; And realize retrieval and indexing to remotely-sensed data having solved the safety problem in the Sharing of remote sensing data process based on the metadata information of remotely-sensed data.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or the description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The acquisition methods schematic flow sheet based on the remotely-sensed data of grid that Fig. 1 provides for the embodiment of the invention one;
The acquisition methods schematic flow sheet based on the remotely-sensed data of grid that Fig. 2 provides for the embodiment of the invention two;
The structural representation based on the deriving means of the remotely-sensed data of grid that Fig. 3 provides for the embodiment of the invention three.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Grid is a kind of infrastructure that the resources integration that disperses on the geographic position is got up.By this infrastructure, the detail that the user does not need to understand resource on this infrastructure just can be used the resource of oneself needs, shares pellucidly and uses the data resource of storing on the grid, makes the less cost of its cost obtain higher efficient.Distributed resource and communication network are the physical basis of grid, resource on the grid comprises the entities such as computing machine, cluster, computing machine pond, instrument, equipment, sensor, storage facility, data, software, the related software and the data that need when in addition, these entities are worked also belong to gridding resource.Gridding technique is applied in the remote sensing application, can solve preferably the problem of mass remote sensing data resource sharing, fully utilize in different geographic regions, a large amount of valuable remotely-sensed data resources unused, realize the remotely-sensed data resource in distributed heterogeneous environment effective storage and share.The present invention has proposed a kind of acquisition methods and device of the remotely-sensed data based on grid as the basis take grid, in order to realize sharing of remotely-sensed data resource, solve simultaneously the deficiency that existing remotely-sensed data resource share method and system exist at aspects such as security, isomerism, distributivities.
Wherein, node in the grid can be the actual resource in the gridding resource, such as computing machine, cluster, instrument or equipment etc., the node (comprising local node and destination node) among following each embodiment of the present invention in the grid be all take computing machine as example, but be not limited to this.
Embodiment one
The acquisition methods schematic flow sheet based on the remotely-sensed data of grid that Fig. 1 provides for the embodiment of the invention one, the executive agent of present embodiment is the deriving means based on the remotely-sensed data of grid on the local node, hereinafter to be referred as deriving means, as shown in Figure 1, the acquisition methods that provides of present embodiment may further comprise the steps:
Wherein, request module in the deriving means refers to that the deriving means of local node offers the user, sending the interface of query requests or download request order for the user, for example can be the input window on the web interface, and described input window can be inputted the multiple queries condition for the user; Again for example, also can be a button, as long as clicking this button, the user just can send inquiry or download request to deriving means, various embodiments of the present invention do not limit this.Present embodiment is take the metadata information of the remotely-sensed data of being inquired about as querying condition, and this querying condition should comprise the part metadata information of above-mentioned remotely-sensed data at least.Each node in the grid has the Resource TOC service, can know the remotely-sensed data resource information of other nodes beyond the local node by this Resource TOC service, i.e. the metadata information of remotely-sensed data, and then can inquire required remotely-sensed data.This Resource TOC service is obtained the physical address of this destination node in the metadata information of the remotely-sensed data that demonstration inquires, and the physical address of the destination node that gets access to is returned to request module.
Concrete, the file transfer services on the destination node is according to the local node physical address of Resource TOC service transmission, and the remotely-sensed data that request is downloaded sends local node to, and the remotely-sensed data that this request is downloaded is to satisfy the remotely-sensed data of querying condition in the step 12.
The acquisition methods based on the remotely-sensed data of grid that present embodiment provides, under grid environment, serve the metadata information of the remotely-sensed data of each node of unified management by the Resource TOC on each node, realize the remotely-sensed data resource sharing, simultaneously by metadata information inquiry remotely-sensed data, avoided that remotely-sensed data directly is exposed on the network in the query script, guaranteed the security of remotely-sensed data in the shared procedure.
The below further describes each step in the embodiment of the invention one, so that technical scheme of the present invention is clearer, complete.
In grid, each node storage remotely-sensed data, and the metadata information of the remotely-sensed data of storing is registered in the database of this node.Wherein, remotely-sensed data can be the data from satellite that node receives, and also can obtain from other nodes, and metadata information is effective description and explanation that the features such as content, quality to remotely-sensed data are carried out.Metadata information by remotely-sensed data, the user can carry out detailed, deep understanding to the applicability of remotely-sensed data, what comprise remotely-sensed data is interior with each side details such as, purposes, form, quality, disposal route and acquisition methods, thereby determine whether remotely-sensed data is fit to oneself use, and can utilize deriving means to obtain required remotely-sensed data.
Metadata information in the present embodiment comprises six of data description information, Data dissemination information, metadata reference information, recorded information, range information and contact details at least.
Concrete, the data description information recording/has the essential information of remotely-sensed data.The owner of remotely-sensed data is described in detail by the base attribute information of data description information to remotely-sensed data itself, such as title, summary, keyword, scientific domain, defend asterisk, orbit number, founder, source, form, type, precision, size, engineer's scale etc.Demander can by browsing this data description information, form an overall understanding to remotely-sensed data.
The Data dissemination information recording/is with the remotely-sensed data distribution and obtain relevant information, and it comprises the contents such as charging policy, rights statements, reference address, IP address, port, agreement, pot life, contact details.
Metadata reference information is used for describing the status information of remotely-sensed data metadata itself, comprises the contents such as metadata creation time, nearest modification time, metadata contact details.By metadata reference information, on the one hand, be convenient to the user and understand the information relevant with the foundation of metadata information, on the other hand, help the maintainer of metadata information that metadata information is safeguarded.
Recorded information has recorded the operating position of remotely-sensed data, and namely when who have downloaded this remotely-sensed data resource, mainly comprise: information, use information etc. are provided.
Range information comprises time that the remotely-sensed data content is related and the information of spatial dimension.
The individuals and organizations' that contact information record is relevant with remotely-sensed data contact details are a kind of supplementarys, can not use separately, mainly comprise: contact name, contact address information, phone, mobile phone, fax, Email, unit homepage etc.Along with the development of gridding technique, metadata information will comprise the information of increasing remotely-sensed data.
The aforesaid operations process is the basic condition of execution in step 11 and step 12, on the basis of technique scheme, the Resource TOC service of deriving means inquiry local node, the metadata information of the remotely-sensed data that will inquire about by this Resource TOC service acquisition, can further understand remotely-sensed data by this metadata information, and from the remotely-sensed data metadata information that inquires, know the node at this remotely-sensed data place, namely obtain the physical address of destination node.In the present embodiment technical scheme, by metadata information inquiry remotely-sensed data resource, compare with the existing mode that realizes the remotely-sensed data resource sharing based on metadata, avoided remotely-sensed data directly to be exposed on the network, guaranteed the security of remotely-sensed data, with the unified remotely-sensed data of describing all nodes of the mode of metadata information, shielded the bottom difference of remotely-sensed data simultaneously.
Based on Resource TOC service and the replica location service on each node in the grid, present embodiment provides a kind of method of obtaining the destination node physical address, specifically may further comprise the steps:
Step 121, Resource TOC service be by the copy index service in the replica location service of local node, obtains the local replica directory service in the replica location service of other nodes in the grid;
Step 122, Resource TOC service are according to the local replica directory service of other nodes in the grid, and the database of other nodes in the inquiry grid is according to the metadata information index building catalogue of the remotely-sensed data of storing in the database;
Database in the step 122 is the database of the metadata information of the remotely-sensed data that each node of above-mentioned storage registers, wherein database is just realized a kind of implementation of storing metadata information, can also be stored in word document or the excel table, with the time can call by corresponding interface and software, all describe as an example of database example in the various embodiments of the present invention.
Concrete, present embodiment is defended asterisk, orbit number and collection date as benchmark in the metadata information, make up the three level list catalogue, form by catalogue is organized the metadata information of remotely-sensed data, and be shown to the user, this catalogue generates in user's access process in real time, also just disappears in case access finishes this catalogue.The metadata information that belongs to the remotely-sensed data of same satellite consists of first class catalogue, and namely first class catalogue is to defend the asterisk name; Under first class catalogue, according to orbit number the metadata information of the remotely-sensed data of same satellite is classified again, consist of second-level directory by the metadata information of co-orbital remotely-sensed data not, namely second-level directory is named with orbit number; Afterwards, under second-level directory, according to gathering the date metadata information of the remotely-sensed data of same track is classified, consist of three grades of catalogues by the metadata information of the remotely-sensed data on different acquisition date, namely three grades of catalogues are to gather the date name.Above-mentioned to be that of the index building catalogue that provides of present embodiment is better be not limited to this for example, also can come the index building catalogue according to other information in the above-mentioned metadata information, such as can be according to geographic range or precision etc. in the content metadata; Also can make up more multistage index list, for example, on the basis of above-mentioned three grades of catalogues, can also precision be that benchmark continues to make up the level Four catalogue, again for example, also can be that benchmark continues to make up level Four catalogue etc. the time.
Step 123, Resource TOC service be according to querying condition, and the search index catalogue is with the physical address of the destination node of obtaining the remotely-sensed data place of satisfying querying condition.
At first, the Resource TOC service is according to the asterisk of defending in the querying condition, orbit number and collection date inquire three grades of catalogues, then, the metadata information of required remotely-sensed data is inquired about in continuation under three grades of catalogues according to other information in the querying condition, and after in detecting the user selection index list, having the operation of file of the remotely-sensed data that satisfies querying condition, satisfy the metadata information of the remotely-sensed data of querying condition in the display file, for this remotely-sensed data of the more detailed understanding of user, obtain simultaneously the physical address of the destination node at this remotely-sensed data place that comprises in the metadata information by the replica location service on local node and the destination node.
Concrete, the physical address of the destination node that step 13, step 14 are obtained take step 123 is as the basis, and the simultaneously realization of step 14 also depends on the file transfer services on each node in the grid.Wherein file transfer services is a kind of access mode of Internet resources, and it supports the file of arbitrary format, and simple to operation.Node can start the file transfer services of other any nodes in the grid by the Resource TOC service, only need to know the physical address of node.
Concrete, request module is when requiring the deposit position in this section place is set in Resource TOC service transmission download request process in the deriving means, obtain the physical address of local node, after determining deposit position, send carrying the download request with physical address destination node local node, the Resource TOC service reception starts respectively the file transfer services on the corresponding node of physical address that receives after download request, finish the transmission of remotely-sensed data.
Further, deriving means receives the remotely-sensed data that destination node transmits by the file transfer services of local node, and stores the remotely-sensed data that receives into default deposit position place.Because this file transfer services can be supported the file of arbitrary format, therefore, compare with existing Base on Web service or based on the mode of open system realization remotely-sensed data resource sharing, the technical scheme of present embodiment can realize sharing of heterogeneous remote sensing data, each node only needs the installation file transmission service to get final product simultaneously, need not need access software and host software are installed as based on the sharing mode of open system, saved greatly the cost of the shared remotely-sensed data resource of user.
Embodiment two
The implementation of grid can be based on software platform, and grid middleware Globus Toolkit 4 is a kind of opening architecture, open standard projects for making up computer grid, be the basic platform of the grid of an open source code, provide middleware services and routine library for making up grid application.The most grid project all is that the agreement that provides based on Globus Toolkit 4 and Service and Construction are provided.Globus is to resource management, and basic mechanism and interface is studied and provided to the key theory of the grid computings such as safety, information service and data management.
Based on technique scheme, present embodiment take based on the constructed grid environment of Globus Toolkit 4 as example, technical solution of the present invention is done a progressive explanation.The acquisition methods schematic flow sheet based on the remotely-sensed data of grid that Fig. 2 provides for the embodiment of the invention two.The executive agent of present embodiment is still for being arranged at the deriving means of local node.Before the technical scheme of explanation present embodiment, introduce first the resource based on the required configuration of node in the constructed grid environment of GlobusToolkit 4, concrete: each node installation has running environment JDK, Tomcat and ANT and mesh tool collection Globus Toolkit 4.Mesh tool collection Globus Toolkit 4 comprises PostgreSQL database, replica location service (Replica LocationService; Referred to as: RLS), file transfer services (Reliable File Transfer; Referred to as: RFT), resource registering and maintenance module (rsmanager) and Resource TOC service module (rsdirectory).Wherein, JDK is the running environment of Tomcat, ANT and Globus Toolkit 4, and mesh tool collection GlobusToolkit 4 comprises RLS and RFT, and the relevant information of RLS and RFT is stored in the PostgreSQL database.RLS comprises local replica directory service (Local Replica Catalogs; Referred to as: LRC) with copy index service (Replica locaion Indices; Referred to as: RLI).Tomcat is the running environment of rsmanager, rsdirectory.Rsmanager and rsdirectory are two engineerings of tomcat.
Based on the node that disposes above-mentioned resource, as shown in Figure 2, the acquisition methods that present embodiment provides specifically comprises:
The acquisition methods based on the remotely-sensed data of grid that present embodiment provides, metadata information by the remotely-sensed data of each node in Resource TOC service and the replica location service unified management grid, realize sharing of remotely-sensed data by file transfer services, by metadata information inquiry remotely-sensed data, guaranteed the security of remotely-sensed data in the shared procedure, file transfer services can be supported the file of arbitrary format, can realize sharing of heterogeneous remote sensing data.
Concrete, technique scheme also comprises: node is registered to the remotely-sensed data of storing in the database of node by rsmanager, and by rsmanager can the real-time update node database, namely when node is stored new remotely-sensed data, just by rsmanager the metadata information of this remotely-sensed data is registered in the database, by this technical scheme, can dynamically update remotely-sensed data in the whole grid, to be suitable for practical application.
Embodiment three
The structural representation based on the deriving means of the remotely-sensed data of grid that Fig. 3 provides for the embodiment of the invention three.As shown in Figure 3, the deriving means based on the remotely-sensed data of grid that present embodiment provides comprises hereinafter to be referred as deriving means: acquisition module 31, request module 32, start module 33 and receiver module 34.The specific works principle of this deriving means is as follows:
Behind the physical address of the destination node that acquisition module 31 gets access to, provide it to the request module 32 of deriving means, afterwards, request module 32 sends the download request that carries local node physical address and destination node physical address to receiver module 34, and wherein the local node physical address is to obtain when in the process that sends download request local deposit position being set;
Start simultaneously module 33 behind the startup file transmission service, prepare to receive the remotely-sensed data that satisfies querying condition that destination node sends by file transfer services, and it is stored in the deposit position that starts module 33 appointments.
Further, this deriving means also comprises: memory module 35, the metadata information that is used for the remotely-sensed data that the storage local node registers, in grid, each node has oneself a memory module 35, be respectively applied to store the metadata information of self remotely-sensed data, for other querying nodes, and be shown to the user with the form of index list.Concrete, the metadata information of each node is registered in the database of node separately by the local replica directory service in the replica location service of node separately, wherein database is just stored a kind of mode of the metadata information of remotely-sensed data, memory module 35 can be exactly database itself, it also can be the storage space of stored data base, present embodiment focuses on realizing the storage of the metadata information of remotely-sensed data, does not limit the specific implementation of memory module 35.
The deriving means based on the remotely-sensed data of grid that present embodiment provides, metadata information by acquisition module and replica location service inquiry remotely-sensed data resource, obtain the physical address of the node at the remotely-sensed data place of satisfying querying condition, then by starting module startup file transmission service, finish the transmission of remotely-sensed data between the node, thereby realize sharing of remotely-sensed data, by metadata information inquiry remotely-sensed data, guaranteed the security of remotely-sensed data in the shared procedure.
Concrete, acquisition module 31 comprises: the first acquiring unit 311, query unit 312, construction unit 313 and second acquisition unit 314.The principle of work of this acquisition module 31 is specific as follows:
After acquisition module 31 receives the query requests of receiver module 34 transmissions, obtain the local replica directory service in the replica location service of other nodes in the grid by the first acquiring unit 311, the first concrete acquiring unit 311 is known the local replica directory service in the replica location service of other nodes in the grid by the copy index service in the replica location service of local node; The local replica directory service of other nodes in the grid that query unit 312 is known according to the first acquiring unit 311, the memory module 35 of other nodes, for example database in grid corresponding to inquiry; The metadata information index building catalogue of the remotely-sensed data of storing in the memory module 35 of other nodes in the grid that construction unit 313 inquires according to query unit 312; The index list that second acquisition unit 314 makes up according to querying condition inquiring structuring unit 313, and obtain the physical address of the destination node at the remotely-sensed data place of satisfying querying condition.
Technique scheme, describe the physical address how acquisition module 31 obtains destination node in detail, further illustrate by acquisition module the metadata information of the remotely-sensed data of all nodes in the grid is carried out unified management realizing the principle of sharing of remotely-sensed data, and how metadata information guarantees the security of remotely-sensed data in the shared procedure.
The deriving means based on the remotely-sensed data of grid that above-described embodiment provides can be used for carrying out that the embodiment of the invention provides based on the acquisition methods of the remotely-sensed data of grid, adopt technique scheme, by grid unused in different geographic regions, a large amount of valuable remotely-sensed data resources fully utilize, realize remotely-sensed data resource effectively sharing in distributed heterogeneous environment by Resource TOC service and replica location service, by metadata information inquiry remotely-sensed data, avoided remotely-sensed data directly to be exposed on the network, when realizing Sharing of remote sensing data, guaranteed the security of remotely-sensed data.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of programmed instruction, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. the acquisition methods based on the remotely-sensed data of grid is characterized in that, comprising:
The query requests that the Resource TOC service reception request module of local node sends;
The Resource TOC service of local node is according to the querying condition in the described query requests, obtain the physical address of the destination node at the remotely-sensed data place of satisfying querying condition, and returning to the described request module, described querying condition comprises the part metadata information of described remotely-sensed data at least;
The download request that the Resource TOC service reception described request module of local node sends;
The Resource TOC service of local node is carried out remote sensing data transmission according to described download request startup is local node with file transfer services described destination node, described download request carries local node physical address and described destination node physical address at least, the acquisition methods of local node physical address is in the described download request: the described request module sends in the described download request process, when specifying the deposit position of local node, obtain the local node physical address according to described deposit position.
2. the acquisition methods of the remotely-sensed data based on grid according to claim 1 is characterized in that, also comprises:
Each node is registered to the metadata information of the remotely-sensed data of storing in the database of described each node by the local replica directory service in the replica location service of described each node in the grid;
Described metadata information comprises data description information, Data dissemination information, metadata reference information, recorded information, range information and contact details at least.
3. the acquisition methods of the remotely-sensed data based on grid according to claim 2 is characterized in that the described physical address that obtains the destination node at the remotely-sensed data place of satisfying querying condition is specially:
Described Resource TOC service is by the copy index service in the replica location service of local node, obtains the local replica directory service in the replica location service of other nodes in the grid;
Described Resource TOC service is inquired about the database of other nodes in the described grid according to the local replica directory service of other nodes in the described grid, according to the metadata information index building catalogue of the remotely-sensed data of storing in the described database;
Described Resource TOC service is inquired about described index list according to described querying condition, with the physical address of the destination node of obtaining described remotely-sensed data place of satisfying querying condition.
4. the acquisition methods of the remotely-sensed data based on grid according to claim 3, it is characterized in that described Resource TOC service is inquired about described index list according to described querying condition, physical address with the destination node of obtaining described remotely-sensed data place of satisfying querying condition is specially:
After detecting the operation of the file that has the described remotely-sensed data that satisfies querying condition in the described index list of user selection, show the described metadata information that satisfies the remotely-sensed data of querying condition in the described file, and obtain the physical address of the described destination node in the metadata information of the described remotely-sensed data that satisfies querying condition.
5. the acquisition methods of the remotely-sensed data based on grid according to claim 3 is characterized in that described index list comprises:
First class catalogue, described first class catalogue is made of the file that name is called the satellite numbering;
Second-level directory, described second-level directory is made of the file that name is called orbit number;
Three grades of catalogues, described three grades of catalogues are called the file that gathers the date by name and consist of.
6. the acquisition methods of the remotely-sensed data based on grid according to claim 3 is characterized in that, also comprises:
The local replica directory service of other nodes in the described grid of local node timing acquisition, and copy index service in the replica location service of local node is stored in the local replica directory service of other nodes in the described grid that will obtain, with the described index list of real-time update.
7. the deriving means based on the remotely-sensed data of grid is characterized in that, comprising:
Request module is used for sending query requests or download request;
Receiver module is used for receiving described query requests or the described download request that the described request module sends;
Acquisition module, querying condition for the described query requests that receives according to described receiver module, obtain the physical address of the destination node at the remotely-sensed data place of satisfying described querying condition, and returning to the described request module, described querying condition comprises the part metadata information of described remotely-sensed data at least;
Start module, be used for starting local node and file transfer services described destination node according to the described download request that described receiver module receives, carry out remote sensing data transmission, described download request carries local node physical address and described destination node physical address at least, the physical address of local node is that the described request module sends in the described download request process in the described download request, when specifying the deposit position of local node, obtain according to described deposit position.
8. the deriving means of the remotely-sensed data based on grid according to claim 7 is characterized in that, also comprises:
Memory module is used for the metadata information of the remotely-sensed data that the storage local node registers, and described metadata information is registered in the database of local node by the local replica directory service in the replica location service of local node; Described metadata information comprises data description information, Data dissemination information, metadata reference information, recorded information, range information and contact details at least.
9. the deriving means of the remotely-sensed data based on grid according to claim 8 is characterized in that described acquisition module comprises:
The first acquiring unit is used for the copy index service by the replica location service of local node, obtains the local replica directory service in the replica location service of other nodes in the grid;
Query unit is used for the local replica directory service according to described other nodes of grid, the memory module of inquiring about other nodes in the described grid;
Construction unit is for the metadata information index building catalogue of the remotely-sensed data of storing in the memory module according to described other nodes of grid;
Second acquisition unit is used for inquiring about described index list according to described querying condition, with the physical address of the destination node of obtaining described remotely-sensed data place of satisfying querying condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910236445 CN101702020B (en) | 2009-10-22 | 2009-10-22 | Method and device for obtaining remotely sensed data based on grids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910236445 CN101702020B (en) | 2009-10-22 | 2009-10-22 | Method and device for obtaining remotely sensed data based on grids |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101702020A CN101702020A (en) | 2010-05-05 |
| CN101702020B true CN101702020B (en) | 2013-03-13 |
Family
ID=42156940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910236445 Expired - Fee Related CN101702020B (en) | 2009-10-22 | 2009-10-22 | Method and device for obtaining remotely sensed data based on grids |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101702020B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970955A (en) * | 2017-03-10 | 2017-07-21 | 江苏物联网研究发展中心 | Distributed remotely-sensed data production system based on ZeroMQ and ProtocolBuffer |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103491139A (en) * | 2013-09-03 | 2014-01-01 | 中国农业大学 | Wireless body area network data service method and device based on mobile cloud computing platform |
| CN103559327B (en) * | 2013-11-22 | 2016-06-08 | 中国电子科技集团公司第五十四研究所 | A kind of one-stop processing method of remotely-sensed data demand |
| CN105092783B (en) * | 2015-05-08 | 2017-07-11 | 中国科学院遥感与数字地球研究所 | A kind of air monitoring equipment, method, system and terminal device |
| CN108259521B (en) * | 2016-12-28 | 2021-02-23 | 中国移动通信集团浙江有限公司 | Hot resource sharing method and device |
| US10433035B2 (en) * | 2017-03-31 | 2019-10-01 | Intel Corporation | Profiles for collecting telemetry data |
| CN109347908B (en) * | 2018-09-06 | 2021-10-08 | 东莞中子科学中心 | Data access method for distributed heterogeneous computing |
| CN111079515B (en) * | 2019-10-29 | 2023-10-27 | 深圳先进技术研究院 | Remote sensing big data-based area monitoring method, device, terminal and storage medium |
| CN112612793B (en) * | 2020-12-25 | 2022-11-15 | 恒生电子股份有限公司 | Resource query method, device, node equipment and storage medium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079736A (en) * | 2007-06-08 | 2007-11-28 | 清华大学 | Modeled network resource positioning method |
-
2009
- 2009-10-22 CN CN 200910236445 patent/CN101702020B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079736A (en) * | 2007-06-08 | 2007-11-28 | 清华大学 | Modeled network resource positioning method |
Non-Patent Citations (2)
| Title |
|---|
| 王方雄等.网格环境下空间数据共享与互操作技术研究.《计算机科学》.2009,第36卷(第1期),第97页. * |
| 王铁军等.基于分布式生成树的副本定位服务.《计算机工程与应用》.2007,第43卷(第30期),参见第152-153页. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970955A (en) * | 2017-03-10 | 2017-07-21 | 江苏物联网研究发展中心 | Distributed remotely-sensed data production system based on ZeroMQ and ProtocolBuffer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101702020A (en) | 2010-05-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101702020B (en) | Method and device for obtaining remotely sensed data based on grids | |
| CN109086325A (en) | Data processing method and device based on block chain | |
| RU2383920C2 (en) | System and method for client-supported search using web-agent | |
| CN107633680A (en) | Acquisition methods, device, equipment and the system of trip data | |
| Bedi et al. | Beginning with big data simplified | |
| CN103390018B (en) | A kind of Web service data modeling and searching method based on SDD | |
| CN107026876B (en) | A kind of file data access system and method | |
| CN102184311A (en) | Mobile personal digital assistant (PDA) field emergency command system | |
| Kmoch et al. | A spatial data infrastructure approach for the characterization of new zealand's groundwater systems | |
| CN109710832A (en) | It is a kind of for search for boarding program method and apparatus | |
| Wang et al. | Distributed big data computing for supporting predictive analytics of service requests | |
| Jiang et al. | An interoperable approach for Sensor Web provenance | |
| MX2011003102A (en) | Data subscription. | |
| CN109213940A (en) | Method, storage medium, equipment and system that user location calculates are realized under big data | |
| Scarlato et al. | BATDIV: A Blockchain-based Approach for Tourism Data Insertion and Visualization | |
| CN109558082A (en) | Distributed file system | |
| Barbosa et al. | Applying data warehousing and big data techniques to analyze internet performance | |
| CN101566987A (en) | Secondary information source database system and source processing method thereof | |
| Kliment et al. | Publishing OGC resources discovered on the mainstream web in an SDI catalogue | |
| CN103685435A (en) | Meteorological information sensing WEB retrieval and service branch system based on large-scale ubiquitous environment | |
| Nativi et al. | Searching the new Grail: Inter-disciplinary interoperability | |
| Pino et al. | Evaluation of federated database for distributed applications in e-government | |
| Avazpour et al. | V for variety: Lessons learned from complex smart cities data harmonization and integration | |
| Leite et al. | WS-GIS: towards a SOA-based SDI federation | |
| Péquegnat et al. | Distributed archive and single access system for accelerometric event data: a NERIES initiative |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20171022 |