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This thesis is based on the application of Internet of Things (IoT) and WebGIS in precision agriculture. Through analyzing the current development of precision agriculture in China and considering its advantages and shortcomings, we choose an ecology farm as an example to conduct a new precision agriculture management system (PAMS) based on the above two techniques. We designed the four architectures...
In order to deal with the storage and query problems of massive vector spatial data, we design a vector spatial data model based on HBase. Then, a parallel method of building Hilbert R-tree index using MapReduce and packed Hilbert R-tree algorithm is proposed. In the end, the proposed vector spatial data model and the method of building Hilbert R-tree index in parallel are proven to be effective and...
Large gap of supply and demand for mineral resources brings an urgent need to develop technology and methods for mineral exploration. Metallogenic prediction plays a leading role in mineral exploration. In consideration of current software platform we used and characteristics of specific metallogenic prediction method, the efficiency and quality of metallogenic prediction are not so satisfactory....
Nowadays, high performance parallel computation is deemed as a good solution to the complicated processing of massive spatial data. It is a very important precondition to make the most of this technology that data be partitioned. In this paper, we talk about the general strategy of spatial data partition and summarize its principles are good space proximity, balanced data load, small data redundancy...
A new methodology of mobile police spatial information service grid model is studied based on spatial grid computing environment. Key technologies are presented in the model, including spatial grid computing, mobile agent (MA) distributed computing, mobile geographic information system (GIS), global positioning system (GPS), video monitoring, transfer control protocol/internet protocol (TCP/IP), and...
Energy shortage brings the challenge of "high-efficiency, high-quality" to evaluation of mineral resources. Subject to conditions, general softwares for evaluation of mineral resources are mainly used in the stand-alone environment, while geological spatial data are often cross-regional, cross-platform and stored distributed. With the rapid development of grid computing, various distributed...
Online virtual world such as second life becomes more and more popular nowadays. And way-finding in large-scale virtual worlds becomes important problem for both novices and experts. Similar to the physical world, a well-designed mapping system would play an important role in way-finding process. However, Second Life only supports thumbnail map system right now. The thumbnail map system could only...
The Barn project, a spatial data grid prototype under development currently, provides a grid environment for applications of the nationwide geological survey data. Within Barn, in order to reduce data access latency, avoid a single point of failure, and increase the performance and load-balance of the system, we have designed and implemented a set of replica management services. These services, based...
The Barn project, a geospatial data grid prototype, provides a grid environment for applications of the nationwide geological survey data. Barn is developed based on the Globus Toolkit. Through Web portal, users can manage the grid resources, perform browsing, querying and analysis against the spatial data. According geospatial application nodes are organized into application domains. The node management...
The integration of services in heterogeneous, distributed grid environment is dynamic and diverse because of the disparate resources. Hence, this integration can be technically challenged due to the need of achieving various service when running on different platforms. So, in a grid environment, implementations of GIS (geographic information system) should not only concern their internal spatial characteristics,...
The research on the sharing and interoperation of geospatial information is always a hotspot in GIS field. Many methods have been proposed such as data format transform, data direct access, Web GIS and data interoperation. These technologies have made great progresses in the sharing and interoperability of geospatial information. But there are many unconquerable problems such as the process of the...
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