(1. Peking University Institute of Earth and Space Sciences; 2. Beijing Geological Survey and Research Institute; 3. Inner Mongolia Autonomous Region Institute of Land and Resources Information)
It is an important work of mining administration to verify the geological exploration involving state investment within the mining rights. Based on GIS technology, the function of screening state-funded geological exploration and verifying overlapping areas within the scope of mining rights is realized by combining spatial data of mining administration with geological data. The system has been applied in the actual work of the Department of Land and Resources of Inner Mongolia Autonomous Region, which greatly improves the verification efficiency.
Keywords GIS spatial analysis of state-funded geological exploration; Image registration
Introduction to 0
State-funded geological exploration refers to geological exploration in which the funds for geological exploration are invested by the state and the risks of geological exploration are borne by investors (countries). The sources of geological exploration funds invested by the state generally include taxes, mineral resources compensation fees, mining rights use fees and prices, and geological exploration funds (central or local) [1 ~ 2]. The results of state-funded geological exploration are reflected in mining rights in different forms, so it is necessary to consider state-funded geological exploration in the registration and transfer of mining rights.
Mining Bureau generally undertakes the registration, alteration and cancellation of mining rights and the registration of mineral reserves. GIS technology has been widely used in mining management systems such as mining right management system, reserve spatial database management system and mining right approval system [3 ~ 7], which mainly realizes the functions of data filling, mining right registration business process management, online approval, graphic query, statistics and release based on GIS functions. The application of GIS in "managing mine with one map" is a hot topic in the industry. It is mainly to integrate the field verification data of mining rights with mineral resources planning and other databases to realize the approval, supervision and statistical analysis of mining rights [8 ~ 1 1].
Based on GIS technology, combined with geological archives, and integrating spatial information such as exploration right, mining right and reserves, the functions of geological exploration screening and overlapping area verification involving state investment within the mining right scope are realized, which provides support for price accounting in mining right registration and transfer. The system has been applied in the work of the Department of Land and Resources of Inner Mongolia Autonomous Region, which has solved the problems of low accuracy and long period of traditional verification and improved the efficiency of mining administration.
1 Framework and functions of the system
Design idea of 1. 1
Examination and approval of mining right (exploration right, mining right, demarcation of mining area, etc.). ), price evaluation and payment is an important work in mining management, and the verification of state-funded geological exploration within the scope of mining rights is one of the important basis for mining management, price evaluation and collection. The construction of state-funded geological exploration and verification system based on GIS should meet the multi-level needs of mining administration and realize the requirements of basic data management, query, graphic verification, report management and statistical analysis. System construction should follow the basic ideas of overall design, step-by-step implementation, advanced technology, safety and reliability.
Overall design, step-by-step implementation: the system design is guided by the demand of mining administration, with overall planning, top-level design and step-by-step implementation. Give priority to the reasonable design of system architecture, and gradually deepen the design of functional components and system interfaces on this basis, so as to achieve high cohesion and low coupling among components, and strive to form a platform with reasonable layout, complete functions, balanced capabilities and clear division of labor.
Advanced technology, safety and reliability: the system construction fully draws lessons from the frontier technology of information technology development, comprehensively applies many information technologies such as database, geographic information system (GIS) and distributed computing, and follows the design principles of stability (stable operation) and expansibility (function, data, visualization, user interface, etc.). ), configurability (configurable parameters), standardization and normalization.
1.2 system framework
The framework of the state-funded geological exploration verification system based on GIS includes database, technical support, application system and users, as shown in figure 1. Using geological data catalog database, geological data graphic database, exploration right registration database, mining right registration database and reserve space database, relevant data items are extracted to establish a database; Use spatial database engine to access data; Based on the secondary development of GIS platform, the functions of spatial retrieval and graphic verification are realized; The basic components realize display, visualization, report, report template, output and other functions.
Figure 1 Framework of State-funded Geological Exploration Verification System Based on GIS
Main functions of 1.3
Basic data management: mainly including geographic base map, geological data catalogue data, exploration right registration data, mining right registration data and reserved space data management. In addition to the functions of data import, entry, modification and deletion, it also includes the function of generating layers by using regional coordinates (inflection point coordinates). The generated layers include geological data catalog GIS layer, exploration right GIS layer, mining right GIS layer and reserve GIS layer. In addition, when the regional coordinates (inflection point coordinates) change, the GIS layer will also be updated.
Conditional query: including geological data catalogue data, exploration right registration data, mining right registration data and reserve space data query.
Spatial retrieval: In addition to click retrieval, drop-down retrieval and input geographic coordinates retrieval, there are two kinds of interactive retrieval functions of layers.
Graphic verification: The function includes two aspects: one is to load the exploration right layer, mining right layer, reserve information layer and geological data directory layer on the basis of geographical base map, and realize the functions of geological data retrieval, display, addition and deletion, data viewing and so on within the mining right to be verified; The second is to realize the function of comparing the overlapping areas between the mining rights to be verified and the geological exploration funded by the state, including data import, registration, ranging, area measurement, data export and other functions.
Audit report management: after the audit information is saved to the database, the system has the functions of extracting audit information and automatically generating reports, as well as uploading reports to the warehouse, querying and displaying them.
Statistical analysis: according to the nature of mining rights (bidding and auction, exploration and mining rights, and demarcation of mining areas), according to the type of mining rights (exploration transformation, continuation, change, transfer and establishment), according to administrative divisions (administrative divisions of provinces, cities and districts where mining rights are located).
2. The main key technologies and implementation of the system.
Oracle 10 g database is adopted in the system, and the data items extracted from geological data catalog database, exploration right registration database, mining right registration database and reserve space database are correlated according to spatial attributes. The system adopts C # WinForm and is redeveloped based on GIS platform. The key technologies to realize the system mainly include the screening of mineral rights related to state-funded geological exploration projects, the verification of overlapping areas of mineral rights related to state-funded geological exploration, the extraction of verification information and the generation of verification reports.
2. 1 Spatial data and attribute data organization
Geological data is a unique information resource obtained by the state's huge investment in exploration funds [3], which is formed by summarizing the original geological data and physical geological data formed by geological exploration. Geological data should be submitted in accordance with the Management Measures for Geological Exchange [12]. The collected geological data include catalogues and electronic documents. Using geological data catalog database, geological data graphic database, exploration right registration database, mining right registration database and reserve space database, relevant data items are extracted, and then data items related to verification characteristics are added to form the data content of the verification system.
Extract data items such as grade number, report name, starting longitude, ending longitude, starting latitude and ending latitude. From the geological data catalog database, whether the data items involving state investment are supplemented; Extracting the file number and electronic file of the geological data graphic database; Extract data items such as mining right certificate number, project name, mining right nature, applicant, exploration unit, geographical location, starting from east longitude, ending at east longitude, starting from north latitude, ending at north latitude, and regional coordinates (inflection point coordinates), and organize spatial data layers by using coordinate information; Extract data items such as mining right certificate number, mine name, mining right nature, applicant, exploration unit, geographical location, starting from east longitude, ending at east longitude, starting from north latitude, ending at north latitude, and regional coordinates (inflection point coordinates), and organize spatial data layers by using coordinate information; Extract data items such as mining area name, report name, administrative region, main minerals, mining area, geographical location, starting point is east longitude, ending point is east longitude, starting point is north latitude, ending point is north latitude, and regional coordinates (inflection point coordinates), and organize spatial data layers by using coordinate information.
In addition, the data items used to save the verification results are designed, which mainly include: document number, project name, project nature, mining right number, owner, area, administrative area, starting point in east longitude, ending point in east longitude, starting point in north latitude, regional coordinates (inflection point coordinates), report issuing time and whether the state contributes.
2.2 Mining rights involve the screening of geological exploration projects funded by the state.
The exploration right layer, mining right layer, reserve information layer and geological data catalogue layer are loaded on the geographical base map, and the geological exploration projects involving state investment within the mining right range are realized by using the spatial analysis function of GIS [13, 14]. The specific steps are as follows:
1) Establish a graphic workspace with the geographic coordinates of Xi 'an80, and load the exploration right layer, mining right layer, reserve information layer and geological data catalogue layer, in which the exploration right layer, mining right layer and reserve information layer are generally projected by Gaussian three-dimensional belt or Gaussian six-dimensional belt, and coordinate transformation is needed.
2) The attribute "Does it involve national investment" in the geological data catalog layer is marked as "involves national investment" and "does not involve national investment" respectively.
3) In the exploration right layer, mining right layer or reserve information layer, select the mineral rights to be verified, and use the spatial analysis function of GIS to get all geological exploration projects within the mineral rights, as shown in Figure 2.
4) Using the data item "Does it involve state investment" for further screening, we can get the geological exploration projects involving state investment within the scope of mining rights.
5) Screening projects involving state-funded geological exploration can be added or deleted if supported by other data.
Fig. 2 is a schematic diagram of the geological exploration project involving the mineral rights to be verified.
2.3 verify the overlapping area between mineral rights and geological exploration funded by the state.
Link the selected geological exploration projects involving state-funded projects with the graphic database, extract the data of state-funded geological exploration projects, and verify the overlapping area between mining rights and state-funded geological exploration by using the registration function of vector data and image data of GIS [15 ~ 17]. The specific steps are as follows:
1) to establish a graphic workspace, and the graphic work adopts the projection of Gaussian three-degree area or Gaussian six-degree area to load the graphics of the mining right to be detected.
2) Obtain the image data of the geological exploration work area funded by the state, and register with the mining right map to be verified as reference, as shown in Figure 3.
3) After registration, use distance or area measuring tools in the graphic workspace to determine the proportion of mining rights to be verified and the geological exploration workspace involving state investment.
Fig. 3 Registration of graphics of mining rights to be verified and images of state-funded work areas.
2.4 The verification information is extracted and the verification report is automatically formed.
The information related to the scope of mining rights, such as mine owner, mining rights, location (coordinates), area, geological exploration and so on, formed in the verification is extracted and stored in the database. Using Word template, the system automatically generates verification report, which provides an important basis for mining right price accounting.
3 system application
After the development of the system, relying on the construction project of basic database and management system in Inner Mongolia Autonomous Region, it has been applied in the actual work of the Department of Land and Resources in Inner Mongolia Autonomous Region, greatly improving the verification efficiency. Figure 4 shows the main interface of the system.
Fig. 4 GIS-based interface of state-funded mining rights geological exploration and verification system.
In the past, to verify a mining right involving state-funded geological exploration, it was necessary to read about 20 paper documents, and to manually project the coordinates onto a paper map of mining rights before reaching a conclusion. This method is time-consuming, laborious and inefficient. The system realizes the automation of the verification process, uses the spatial analysis function of GIS to quickly obtain geological exploration involving national investment, and can directly access geological data and view them on the computer screen, thus reducing the time of repeatedly accessing paper geological data and improving the verification efficiency by more than 30%.
4 conclusion
Based on GIS technology, combined with the actual needs of mining information management, the verification function of geological exploration involving state investment within the scope of mining rights is realized. The system has achieved good results in the application of the Department of Land and Resources of Inner Mongolia Autonomous Region. The system has completed more than 1000 mining rights verification, improved the mining administrative ability and achieved good social and economic benefits.
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