How wide is the range of applications of GIS? Who gives a specific example

It is very wide, and all issues related to spatial location can be solved better by using GIS. For example, site selection, spatial statistics**.

If you take a look at "Zhongding Technology", the first thing is that you can find the information slowly by yourself.

1. Resource management.

It is mainly used in the field of agriculture and forestry to solve the problems of distribution, classification, statistics, and mapping of various resources (such as land, forest, and grassland) in the field of agriculture and forestry. There are two main types of problems: "positioning" and "mode".

2. Resource allocation.

In the city, the distribution of various public facilities, disaster relief and mitigation materials, nationwide energy security, food and other institutions in various places are all resource allocation issues. The goal of GIS in this type of application is to ensure the most rational allocation of resources and maximize the benefits.

3. Urban planning and management.

Spatial planning is an important application area of GIS, and urban planning and management is the main content of it. For example, how to ensure the proportion and reasonable distribution of green space in the construction of large-scale urban infrastructure, and how to ensure that schools, public facilities, sports venues, service facilities, etc. can have the largest service area (urban resource allocation problem).

4. Land information system and cadastral management.

Land and cadastral management involves many contents such as changes in land use properties, changes in the contour of land plots, changes in cadastral tenure relations, etc., which can be completed efficiently and with high quality with the help of GIS technology.

5. Ecological and environmental management and simulation.

Regional ecological planning, environmental status assessment, environmental impact assessment, decision-making support for pollutant reduction and allocation, decision-making support for environment and regional sustainable development, management of environmental protection facilities, environmental planning, etc.

6. Emergency response.

In the event of major natural or man-made disasters such as floods, wars, and nuclear accidents, how to arrange the best evacuation routes and equip them with corresponding transportation and support facilities.

In general, the spatial analysis of GIS can be divided into spatial analysis of thematic maps, network analysis, and DTM analysis.

1. The spatial analysis of thematic maps includes: overlay analysis, query analysis, and buffer analysis.

1.Overlay analysis mainly includes:

1) Visual information overlay: Visual information overlay is to superimpose the information content from different sides on the result picture or screen, so that the researcher can judge the spatial relationship between them and obtain richer spatial information.

2) Point-to-polygon overlay: The point and polygon superposition is actually to calculate the inclusion relationship between polygons and points.

3) Line and surface superposition: It is to compare the relationship between the coordinates on the line and the coordinates of the polygon to determine whether the line falls within the polygon.

4) Polygon and polygon overlay: Polygon overlay superimposes two or more polygon layers to produce a new polygon layer, and the result is that the original polygon feature is divided into new elements, and the new elements combine the attributes of the original two or more layers. The commonly used surface superposition mainly includes intersection, subtraction, discrimination, union and so on.

2.Include analysis query: include analysis to determine whether there is a direct connection between the elements, that is, whether there is a connection between vector points, lines, and surfaces in the spatial location, which is a common problem in geographic information analysis and processing, and is also the prerequisite and basic analysis method for realizing graphic-attribute alignment retrieval in geographic information system.

3.Buffer analysis: Buffer analysis is an information analysis method that automatically establishes buffer polygon entities within a certain width around them according to the points, lines, and polygons of the database, so as to realize the expansion of spatial data in the horizontal direction.

2. Network analysis: Network analysis is a basic model in the operations research model, and its fundamental purpose is to study and plan how to arrange a network project and make it run the best effect, such as the optimal allocation of certain resources, the lowest transportation cost from one place to another, etc. The basic idea is that human activities always tend to choose the spatial location to achieve the best effect according to a certain goal.

3. DTM analysis: DEM (digital elevation model) and DTM (digital terrain model) are mainly used to describe the undulating conditions of the ground, and can be used to extract various terrain parameters, such as slope, aspect, roughness, etc., and carry out application analysis such as visual analysis and watershed structure generation. As a result, DEMs are widely used in various fields.

DEM is the basic data for establishing DTM, and other terrain features can be directly or indirectly exported from DEM, called "derived data" such as slope and aspect.

(1) GIS has a small footprint, small size, light weight, and all components are sealed without environmental interference.

2) The operating mechanism is oil-free, gas-free, and has a high degree of operational reliability.

GIS is transported in one piece, which is easy to install, short cycle and low installation cost; The maintenance workload is small and the time is short. The co-box GIS adopts three-phase mechanical linkage, and the mechanical failure rate is low.

4) Superior breaking performance - the circuit breaker adopts a self-energy arc extinguishing chamber (a hybrid structure of self-energy thermal expansion and auxiliary compressor device) based on the new arc extinguishing principle, which makes full use of the energy of the arc itself.

5) Low loss and low noise - the induced magnetic field on the GIS housing is small, so the eddy current loss is small, which reduces the loss of electrical energy. The use of the spring mechanism makes the operating noise very low.

2. Resource allocation (resource configuration) In the city, various public facilities, nationwide energy security, food, distribution of materials in disaster relief and mitigation and other institutions are all resource allocation issues.