CN111143716B - Self-adaptive map display method and device based on lake object - Google Patents
Self-adaptive map display method and device based on lake object Download PDFInfo
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- CN111143716B CN111143716B CN201911381822.8A CN201911381822A CN111143716B CN 111143716 B CN111143716 B CN 111143716B CN 201911381822 A CN201911381822 A CN 201911381822A CN 111143716 B CN111143716 B CN 111143716B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/953—Querying, e.g. by the use of web search engines
- G06F16/9537—Spatial or temporal dependent retrieval, e.g. spatiotemporal queries
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
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Abstract
The invention belongs to the technical field of thematic map visualization, and particularly relates to a map self-adaptive display method and device based on lake objects. Firstly, acquiring characteristic information data of lake objects in a map, and classifying and storing the characteristic information according to the category of the characteristic information, wherein the characteristic information is divided into basic information and expansion information; and then determining the feature information to be displayed according to the user requirement, calling the feature information data to be displayed from the feature information data stored in a classified mode, and adding the corresponding feature information data to the map for display according to the display mode corresponding to each feature information. The invention can flexibly display the map as various types of maps, can meet different requirements of different users, and has strong universality.
Description
Technical Field
The invention belongs to the technical field of thematic map visualization, and particularly relates to a map self-adaptive display method and device based on lake objects.
Background
With the development of internet technology, people increasingly rely on rich, quick and timely information provided by the internet, including electronic maps. Compared with the traditional paper map, the electronic map has the advantages of timely updating, convenient inquiry, visual and concise use and the like, is widely applied to the fields of geographic positioning and navigation, and greatly facilitates the lives of people.
Lakes are an important component of the geographic environment, and are typically displayed in a map. The lake not only can maintain ecological balance, but also has a plurality of functions of providing water source, fishery, power generation, flood control, irrigation, travel and the like. Once the lake is formed, the lake is continuously evolved under the continuous actions of external natural factors and internal various processes, the influence of human activities on the lake is not very small, the area, the outline shape, the water level, the water quality condition and the like of the lake are continuously changed, and a user can acquire the needed information from the characteristics of the lake.
According to different demands of users, various thematic maps are designed for the map by taking lakes as objects, for example, history transition maps, travel planning maps, ecological protection maps, city landscape maps, disaster prevention maps, resource distribution maps and the like are divided according to different use purposes, and the information presented by each map is different. The thematic map is developed independently according to the demands of various departments, and each thematic map is specific to a specific crowd and has strong pertinence. For example, the travel planning map presents more information such as landscape constitution, aquatic products, surrounding environment and the like of the lake, the history transition map presents more dynamic transition conditions such as category, area, shape and the like of the lake, and the ecological protection map presents more water quality conditions, faced problems, prevention measures and the like of the lake. The type of data to be displayed for each thematic map is fixed and unchanged, and only the data relevant to the corresponding application is displayed. However, the needs of users are often more than one, for example, users need to travel to a location, first need to view a travel planning map to see the base of the area, and also need to view a historical transition map to make a systematic understanding of the area. At this time, the thematic maps are not universal enough, and the flexibility is poor. A single thematic map cannot meet the need for user diversity.
Disclosure of Invention
The invention provides a self-adaptive map display method and device based on lake objects, which are used for solving the problem that a single thematic map in the prior art cannot meet the requirement of user diversity.
In order to solve the technical problems, the technical scheme of the invention comprises the following steps:
the invention provides a map self-adaptive display method based on lake objects, which comprises the following steps:
acquiring characteristic information data of lake objects in the map, and classifying and storing the characteristic information data according to the category of the characteristic information, wherein the characteristic information is divided into basic information and expansion information; the basic information comprises the name of the lake, the spatial position of the lake and the outline shape of the lake; the expansion information comprises at least one of attribute information, relationship information, function information, state information and composition structure; the attribute information comprises at least one of water level, area, salinity, appearance picture and category, the relation information comprises at least one of the relation between a lake and the surrounding environment, the relation between a lake and human and the relation between a lake and a river, the function information comprises functions of the lake, the state information comprises ecological environment information of the lake, and the composition structure comprises at least one of contained plant resources, contained animal resources and contained mineral resources; and determining the feature information to be displayed according to the user requirement, calling the feature information data to be displayed from the feature information data stored in a classified mode, and adding the corresponding feature information data to the map for display according to the display mode corresponding to each feature information.
The method has the beneficial effects that: the method and the system acquire all the characteristic information data of the lake objects in the map, and can call the characteristic information data to be displayed according to the requirements of the user so as to add the characteristic information data on the map for display. When a user needs to display a historical transition map, characteristic information data (such as water level, area, salinity and the like) related to the historical transition map are correspondingly called, and when the user needs to display a travel planning map, characteristic information data (such as plant resources, animal resources, relations between lakes and human beings and the like) related to the travel planning map are correspondingly called, so that the map can be flexibly displayed as a map of a historical transition pattern or a map of a travel planning pattern or other types of maps, different requirements of different users can be met, and the universality is high.
As a further improvement of the method, in order to conveniently and quickly call the characteristic information data to improve the map display efficiency, the characteristic information data is stored in a table form according to the category of the characteristic information when being stored in a classified mode, and the basic information and the expansion information correspond to different tables respectively.
As a further improvement of the method, in order to conveniently and quickly find out certain required expansion information to improve the efficiency of map display, various information data of the expansion information are classified and stored according to the types of the expansion information.
As a further improvement of the method, in order to conveniently and rapidly find out certain required expansion information to improve the efficiency of map display, various information data of the expansion information are stored in a form of a table according to the types of the expansion information, and the various expansion information respectively correspond to different tables.
As a further improvement of the method, in order to conveniently find out the data in different time periods to meet the requirements of different types of map display, the characteristic information data are stored in a partition mode according to the time of the characteristic information data when the characteristic information data are stored in a classified mode, and the characteristic information data in the same time period are stored in each partition mode.
As a further improvement of the method, in order to conveniently and quickly find the storage position of the characteristic information data, the characteristic information data is also provided with a lake object identifier when being stored in a classified mode.
As a further improvement of the method, in order to hide some temporarily useless characteristic information data according to the user requirement so as to be convenient for viewing other useful characteristic information data, or to display some characteristic information data after hiding so as to conveniently and quickly obtain useful characteristic information data, the method further comprises the step of hiding or displaying corresponding characteristic information data on a map according to the user instruction.
The invention also provides a map self-adaptive display device based on the lake object, which comprises a memory and a processor, wherein the processor is used for executing instructions stored in the memory to realize the map self-adaptive display method based on the lake object and can achieve the same effect as the method.
Drawings
FIG. 1 is a flow chart of a method for adaptive display of lake object-based maps in an embodiment of the method of the present invention;
FIG. 2 is a diagram of classification of characteristic information in an embodiment of the method of the present invention;
FIG. 3 is a diagram of a feature information data store in an embodiment of the method of the present invention;
FIG. 4 is a diagram showing the correspondence between topic maps and feature information in a method embodiment of the present invention;
FIG. 5 is a diagram of user interface interactions in an embodiment of the method of the present invention.
Detailed Description
Method embodiment:
this embodiment provides a map adaptive display method based on lake objects, as shown in fig. 1, and the method will be described in detail below.
Step one, various years (such as the last ten years) and various kinds of characteristic information data of lake objects in a map are acquired. Wherein, as shown in fig. 2, the feature information is divided into basic information and extension information.
The basic information includes: lake ID, name of lake, spatial location of lake and outline shape of lake.
The expansion information comprises: attribute information, relationship information, function information, status information, and constituent structures.
Wherein the attribute information includes: water level, area, salinity (which may be fresh water, brackish water, brine, dry salt or under sand), appearance pictures and categories (which may be construction lake, crater lake, barrier lake, karst lake, glacier lake, aeolian lake, river lake, sea lake or laquer).
The relationship information includes: the relationship between a lake and the surrounding environment (including scenic spots close to the lake, restaurants near the lake, toilets near the lake, sceneries around the lake and factories near the lake), the relationship between the lake and the river (whether or not a river is afflux and which river is afflux), and the relationship between the lake and human (whether or not human activity is developing and which human activity is).
The function information includes: lakes have functions (including regulating river runoff, developing irrigation, providing water sources, communicating with shipping, improving regional ecological environments, developing minerals, and regulating climate, etc.).
The status information includes: the ecological environment information of the lake specifically comprises the water quality (grade is divided into I-V) of the lake and the main problems (eutrophication, area atrophy, water quality pollution and the like) faced by the lake.
The composition structure comprises: plant resources contained in lakes, animal resources contained in lakes, mineral resources contained in poises, whether ships pass through or not, and the like.
And step two, storing the characteristic information data obtained in the step one in a database according to the structure shown in fig. 3. The table LackObject is a collection of all lake objects, and has several different types of characteristic information, namely basic information (LakeBasic), attribute information (LakeAttrs), relation information (LakeRela), function information (LakeFunc), state information (LakeState) and composition structure (LakeConst), wherein each characteristic information is stored by using a different table, and a connection is established through a lake object identification objectID. That is, in the specific storage, feature information data of different years are stored in different partitions in the form of a table, and feature information data of the same year is stored in one partition. Further, in each partition, the feature information data is also stored in the form of tables in different tables, one for each category, in accordance with the categories of the basic information, attribute information, relationship information, function information, status information, and constituent structure. In addition, each table is provided with a lake ID (i.e. a lake object identifier) so as to conveniently find the characteristic information data corresponding to a certain lake.
And step three, correspondingly determining the feature information to be displayed according to the type of map display designated by the user.
Generally, the types of maps can be classified into the following categories according to the use purpose of the map: history transition map, travel planning map, ecological protection map, city landscape map, disaster prevention map and resource distribution map. The content of each type of map presentation is different and the characteristic information displayed is different. As shown in fig. 4, a history transition map, a travel planning map, and an ecological protection map are exemplified.
The history transition map reflects the change of the lake in area, contour and water level along with the change of time, and the data which are selected by the history transition map are the water level, area and salinity in the basic information and attribute information of the national lake in the last ten years.
The user of the travel planning map is concerned about the appearance of the lake, whether the surrounding scenery is beautiful, the characteristics of the lake and some scenic spots, restaurants and the like around the lake, so that the user can select which lake is most wanted to play, and a better travel route is provided for the user conveniently. The tourist map user wants to know the latest information, so the data selected by the tourist map are basic information of the latest year of the whole country lake, appearance pictures and categories in attribute information, relations between the lake and surrounding environment in relation information (including scenic spots close to the lake, restaurants near the lake, toilets near the lake and scenery around the lake), plant resources contained in the lake in the composition structure and animal resources contained in the lake.
The ecological protection map is concerned about the ecological problem of the lake, so that the water quality condition, the faced problems and the like of the lake are concerned, and whether information such as factories, human activities which are performed at present and the like exists around the lake is displayed on the map, so that pollution sources and reasons for the ecological problem can be rapidly analyzed, and prevention measures are facilitated, and the data selected by the ecological protection map are basic information of the corresponding lake (according to user selection) in the corresponding year, the relation between the lake and the river in the relation information, the relation between the lake and the human, the factories, the function information in the vicinity of the lake, and the water quality and the faced main problems of the lake in the state information.
And step four, extracting corresponding characteristic information data from the database according to the characteristic information to be displayed determined in the step three, adding and displaying the corresponding characteristic information data on the map according to the display mode corresponding to each characteristic information, so as to construct the mapping relation between the characteristic information data and the visualization method, symbolizing each characteristic information data and displaying the characteristic information data on the map by a proper visualization method. Moreover, the design of the visual interface for displaying the map is flexible, and on the visual interface, the displayed characteristic information data or the characteristic information data which is not displayed can be hidden on the map according to the instruction of a user. Also, the following describes a visual manner with a history transition map, a travel planning map, and an ecological protection map as typical examples.
Historical transition maps are dynamic representations of data of nearly ten years, and dynamic visualization methods are selected. As shown in fig. 5, the design of the time axis mainly includes a pause button, a start button and a fast forward/backward button, so that the user can operate the interface according to the needs of the user.
The travel planning map relates to the characteristic information of lakes, basic information, attribute information and composition structures can select annotation methods, the annotation methods can be displayed or hidden by clicking of users, related information is represented by fixed-point symbol methods, surrounding scenic spots, restaurants and toilets are designed by symbol, and the surrounding scenic spots, restaurants and toilets are marked on the map.
The ecological protection map firstly selects an equivalent region method, pollution conditions of lakes in the whole country are displayed on the map, and the lakes with different pollution degrees are filled with lake symbols with different colors. The user can enter the ecological protection map of the lake itself with finer granularity by clicking on the lake. Because the pollution degree of different areas of each lake is different, the polluted areas of the lakes are represented by adopting a range method, and the ecological problems of each lake are mostly more than one and only relate to the primary and secondary relations of the problems, so that the related ecological problems are marked in each polluted area by adopting a partition statistical chart method, and the severity of the problems is represented by the height of a histogram. In addition, the symbols of the surrounding river, the factory and the like are designed, and basic information, functional information and the like of the lake can be marked beside by combining an annotation method.
In addition, when the map is displayed, the design of the visual interface can be flexibly designed according to the requirements of users. For example, as shown in fig. 5, a selection frame is arranged at the upper right corner of the interface, so that a user can select a map type according to the needs of the user, a part of maps need to select a lake object ID or name which is needed to be known, other types of maps can be displayed besides the history transition type map, the user also needs to select different times according to the needs, and therefore feature information data of corresponding years are automatically scheduled from a database, and the different types of maps are automatically displayed according to the method mentioned above. In the use process, a user can enter a map page of corresponding time by clicking a time axis below the interface at any time, and can realize dynamic sequential playing of maps of different time points by clicking a play button, so that the user can more intuitively see the change of corresponding lake objects along with the change of time. In addition, the user can select IDs of other lake objects by clicking the selection box in the upper right corner, and replace the lake object to be understood. Of course, other lake objects or other types of maps are required to be displayed, and the characteristic information data of the database only needs to be correspondingly extracted. The user can add the map type according to the requirement, correspondingly design the characteristic information corresponding to the map type, and correspondingly extract the corresponding characteristic information data from the database when the map is displayed as the map of the map type.
Device example:
the embodiment provides a map adaptive display device based on lake objects, which comprises a memory and a processor, wherein the memory and the processor are directly or indirectly electrically connected to realize data transmission or interaction. The processor may be a general-purpose processor, such as a central processing unit CPU, or may be other programmable logic devices, such as a digital signal processor DSP, where the processor is configured to execute instructions stored in a memory to implement a method for adaptively displaying a map based on a lake object in a method embodiment, and since the method is described in detail in the method embodiment, a detailed description is omitted here.
Claims (8)
1. A self-adaptive map display method based on lake objects is characterized by comprising the following steps:
acquiring characteristic information data of lake objects in the map, and classifying and storing the characteristic information data according to the category of the characteristic information, wherein the characteristic information is divided into basic information and expansion information; the basic information comprises the name of the lake, the spatial position of the lake and the outline shape of the lake; the expansion information comprises at least one of attribute information, relationship information, function information, state information and composition structure; the attribute information comprises at least one of water level, area, salinity, appearance picture and category, the relation information comprises at least one of the relation between a lake and the surrounding environment, the relation between a lake and human and the relation between a lake and a river, the function information comprises functions of the lake, the state information comprises ecological environment information of the lake, and the composition structure comprises at least one of contained plant resources, contained animal resources and contained mineral resources;
determining feature information to be displayed according to the type of map display designated by a user, calling the feature information data to be displayed from the feature information data stored in a classified mode, and adding the corresponding feature information data to the map for display according to the display mode corresponding to each feature information;
when the type of the map is a history transition map, the selected data are the basic information of the national lakes in the last ten years and the water level, area and salinity in the attribute information; when the map is of the type of a travel planning map, the selected data are basic information of the latest year of a national lake, appearance pictures and categories in attribute information, the relationship between the lake in relationship information and the surrounding environment, plant resources contained in the lake in a composition structure and animal resources contained in the lake; when the map is of the type of an ecological protection map, the selected data are the basic information of corresponding lakes according to the corresponding year selected by a user, the relationship between the lakes and rivers in the relationship information, the relationship between the lakes and human beings, factories near the lakes, functional information, and water quality and faced problems of the lakes in the state information.
2. The lake object-based map adaptive display method of claim 1, wherein the feature information data is stored in a table form according to a category of the feature information when the feature information data is stored in a category, and the basic information and the expansion information correspond to different tables, respectively.
3. The lake object-based map adaptive display method of claim 1, wherein various information data of the expansion information are classified and stored according to the category of the expansion information.
4. The lake object-based map adaptive display method of claim 3, wherein various information data of the expansion information are stored in a form of a table according to the category of the expansion information, and the various expansion information correspond to different tables respectively.
5. The lake object-based map adaptive display method of claim 1, wherein the feature information data is stored in the same partition according to the time of the feature information data when the feature information data is stored in the classification.
6. The adaptive map display method based on lake objects of claim 1, wherein the feature information data further includes a lake object identification when the feature information data is stored in a classified manner.
7. The adaptive map display method based on lake objects of any one of claims 1 to 6, further comprising a step of displaying or hiding corresponding feature information data on a map according to a user's instruction.
8. A lake object-based map adaptive display apparatus, comprising a memory and a processor for executing instructions stored in the memory to implement the lake object-based map adaptive display method of any one of claims 1 to 7.
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| CN112199525A (en) * | 2020-09-14 | 2021-01-08 | 北京绘晴科技有限公司 | Generalized historical object research device and method based on time axis |
| CN112380405B (en) * | 2020-12-10 | 2023-03-14 | 中国人民解放军战略支援部队信息工程大学 | Travel event multi-dimensional integrated visualization method based on map |
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