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Discussion on the Application of Cloud GIS in Land and Resources Archives Management
Application of 1 private cloud GIS in land and resources archives management

1. 1 Selection of application mode

GIS is a necessary technical means to manage the data of land and resources archives. As far as the GIS market in China is concerned, the application based on private cloud will become a very important direction. Because most of the data of land and resources archives belong to confidential or sensitive data, the utilization of land and resources archives is professional, and users are concentrated in the land and resources industry and archives utilization department, these factors determine that land and resources archives are not suitable to be built on the public cloud GIS platform. Based on the security and confidentiality of land and resources archives data, among the three construction modes of cloud GIS, private cloud GIS is the best choice for land and resources archives management application.

1.2 private cloud GIS architecture

Esri has launched ArcGIS 10o, a GIS platform product supporting cloud architecture. Esri cloud architecture is the first mature product architecture. The land and resources archives management platform based on private cloud GIS adopts Esri's cloud architecture and will use ArcGIS. Building Land and Resources Archives Cloud GIS on 10 Platform

The private cloud GIS platform of land and resources archives discussed in this paper takes the provincial archives platform of Guangdong Provincial Land and Resources Archives as an example. The platform is built according to the typical three-tier service form of cloud computing, including the infrastructure of provincial land and resources archives data center, such as storage devices, network devices, servers, clients, etc., which is the composition of IaaS layer (infrastructure as a service). The key to deploying cloud GIS is to build a GIS platform on the infrastructure layer, deploy ArcGIS 10 on the basic implementation layer, and build a PaaS layer (platform as a service). Deploy "cloud" service in SaaS layer (software as a service) to meet the application requirements of land and resources archives management in "cloud". IaaS facilities are located in the data center of provincial land and resources archives. Different from the public cloud, the network of private cloud CTIS is a government private network, and its users are limited to land and resources archives management departments and other archives application departments. On the well-structured provincial land and resources archives cloud platform, the preconfigured ArcGIS Server and enterprise Geodatabase mirror architecture are built on the PaaS layer, and the private cloud CTIS platform for land and resources archives is realized. Users on the private cloud platform (including administrative departments at all levels) apply to use the resources on the cloud CTIS platform in accordance with the relevant regulations on the management of land and resources archives, and do not need to pay as the public cloud built by enterprises. In this way, the archives management departments of cities and counties below the provincial level can save the cost and time of platform construction, and can choose different usage modes according to the "T ermLicense" of ArcGIS without following the payment method of Amazon. On the CTIS software as a service (SaaS) layer, cloud-based clients and applications are provided, and file management departments at all levels can use CTIS tools and data to solve complex land and resources file business problems.

2. The "cloud" of land and resources archives service

2. 1 Archives Resource Service

On the private cloud platform of provincial land and resources archives, the services of archives resources include infrastructure (data center) services, land and resources archives data resources and archives management application services.

Guangdong land and resources archives cloud platform is composed of data center and archives management application platform, which is integrated into a virtual resource pool through virtualization technology and coordinated in provincial and municipal networks through hub. The hub of the virtual data center is built in Guangdong Provincial Archives of Land and Resources, and the data center management organization of the Provincial Archives of Land and Resources provides website portal technology and server resources. In order to support users of provincial land and resources archives management departments (1 provincial pavilions and 2 1 municipal pavilions) to access websites and registration forms, the data center needs to invest at least 22 virtual servers to meet the needs of all municipal pavilions in the province to use the archives cloud platform. For these participating municipal land and resources archives departments, they can access their spatial data archives services through the workstation of this cloud platform. In this way, no matter whether the file infrastructure of any unit has network map file service or not, it can cooperate with any unit with this service on the cloud platform to publish basic map file data. Because of this, users who join the cloud platform network should migrate the archives resources to the cloud, and rely on the infrastructure and application of Guangdong Land and Resources Archives Cloud Platform to manage the land and resources archives.

The data resources of land and resources archives are managed in the form of spatial database, and different levels of data are displayed on the application interface. The management service of the spatial data archives is realized through cloud CTIS. In the network of private cloud platform of land and resources archives, users can use the network service address in the registry, and each data set of land and resources archives can be displayed on different CTIS software packages or network sites. Based on ArcGIS Server and Esri's ArcGIS Desktop, Guangdong Land and Resources Archive Cloud Platform can provide map archive service and spatial location search service, and display multi-source spatial data layers from archive resource providers of various units.

2.2 file application services based on GIS

When designing the cloud platform of land and resources archives based on private cloud CTIS technology, the key consideration is to provide comprehensive CTIS method services for land and resources archives according to the spatial and geographical characteristics of land and resources archives, that is, to realize various map services for land and resources data archives management. ArcGISServer can be deployed to the private cloud of provincial land and resources archives by imitating Amazon elasticcompute cloud (Amazon EC2).

In the cloud, not only can the spatial data sets of land and resources archives be combined and stored in the map environment of the private network of the cloud platform and shared with users of file management departments at all levels, but also various commonly used map visualization operation tools can be provided, such as GIS method services such as map scaling, translation, positioning, spatial search and layer transparency control. The data of land and resources archives generated on these distributed servers can be directly sent to the network clients of various users. Each participant provides their land and resource file data through standard map services (WMS, WFS or WCS). Through the cloud platform station, all application services of land and resources archives can be realized. In this way, users at all levels can access the cloud through ArcGIS Online and obtain various map file application services, including ready-to-use map file resource services and GIS operation method services.

3 Conclusion

At present, China has high policy requirements for the security of map data, and it is difficult to fully promote cloud GIS. The land and resources archives management department established a private cloud GIS platform, which enabled the cloud architecture and application services to be carried out locally on the government private network, which not only ensured the safety of land and resources archives data, but also gave full play to the advantages of cloud GIS technology, avoiding repeated investment by various departments and providing a new idea for the informatization development of land and resources archives.