CN107609049B - High-efficiency GIS map engine generation method - Google Patents
High-efficiency GIS map engine generation method Download PDFInfo
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- CN107609049B CN107609049B CN201710714504.3A CN201710714504A CN107609049B CN 107609049 B CN107609049 B CN 107609049B CN 201710714504 A CN201710714504 A CN 201710714504A CN 107609049 B CN107609049 B CN 107609049B
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Abstract
The invention discloses a high-efficiency GIS map engine generation method, which comprises the following steps: s1, initializing a base number for conversion between a map coordinate system and a desktop coordinate system; s2, obtaining map data by adopting gridding algorithm index and memory mapping analysis; s3, using a graphic device interface to perform layer superposition and drawing a map; and S4, calculating the shadow by adopting a gridding shadow algorithm to realize automatic avoidance of the label, and then ending. The invention is convenient for users to more clearly and clearly master the specific position information of things and things. If the labels are newly added in the scenic spot, the layer addition can be directly carried out through the GIS engine, and the map updating is realized. The method has the advantages of high speed, simple operation, easy maintenance, low cost and good compatibility.
Description
Technical Field
The invention relates to a high-efficiency GIS map engine generation method.
Background
The similar products at present comprise a Baidu map API and an ArcGis map engine, the two map engines are the most representative similar products, the Baidu map engine is most widely applied and basically visible in four places on a computer and a mobile phone, but the Baidu provided API depends on a network and cannot be used offline, the speed depends on the network speed, and even the map cannot be opened under the condition of poor network speed; and the service of the slice map is adopted in hundreds of degrees, which occupies storage resources very much.
The ArcGIS engine provides localized and offline services and is mainly applied to government level command center platforms, but the ArcGIS is complex in installation and debugging, high in operation and maintenance difficulty, simple in maintenance and high in requirement on the operation environment of the ArcGIS, high in computer configuration, low in operation speed and large in map amplification and reduction delay.
Disclosure of Invention
The invention aims to overcome the defects and provide a high-efficiency GIS map engine generation method.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a high-efficiency GIS map engine generating method comprises the following steps:
s1, initializing a base number for conversion between a map coordinate system and a desktop coordinate system;
s2, obtaining map data by adopting gridding algorithm index and memory mapping analysis;
s3, using a graphic device interface to perform layer superposition and drawing a map;
and S4, calculating the shadow by adopting a gridding shadow algorithm to realize automatic avoidance of the label, and then ending.
Specifically, in step S2, the process of acquiring the map data includes:
s201, calibrating a desktop coordinate system and acquiring a screen display coordinate range;
s202, converting screen coordinates into a terrestrial coordinate system to display the range of grids;
and S203, rapidly retrieving and loading map big data in a gridding range.
Specifically, in step S3, the map drawing process includes:
dividing the map into a surface map layer, a line map layer and a point map layer, and drawing according to the sequence of surface-line-point.
Specifically, in step S4, the implementation procedure of calculating the shadow by using the gridding shadow algorithm includes:
s401, converting the range of a desktop coordinate system display grid by a terrestrial coordinate system;
s402, expanding grids and increasing shadow areas;
and S403, converting a desktop coordinate system into a terrestrial coordinate system to confirm the coverage range of the gridding shadow.
Further, the realization process of marking automatic avoidance comprises the following steps:
s404, shielding superposition display among map labels in a grid range, wherein the labels are names of map elements;
s405, when the labels conflict, avoidance is automatically identified.
Further, the specific implementation procedure in step S405 is as follows:
when the new mark appears in the gridding shadow range of the existing mark, the new mark is translated in the range of the original position, and the proper position is automatically searched.
MAPINFO adopts data index mode;
the network maps of Baidu, Google, Goodand the like adopt a slicing type.
Compared with the prior art, the invention has the following beneficial effects:
the invention is convenient for users to more clearly and clearly master the specific position information of things and things. If the labels are newly added in the scenic spot, the layer addition can be directly carried out through the GIS engine, and the map updating is realized. The method has the advantages of high speed, simple operation, easy maintenance, low cost and good compatibility.
Drawings
FIG. 1 is a flow chart of the present invention.
FIG. 2 is a flow chart of map data acquisition according to the present invention.
FIG. 3 is a flow chart of the shadow calculation of the present invention.
Detailed Description
The present invention is further illustrated by the following figures and examples, which include, but are not limited to, the following examples.
Examples
As shown in fig. 1-3, a method for generating a high-efficiency GIS map engine includes the steps of:
s1, initializing a base number for conversion between a map coordinate system and a desktop coordinate system;
s2, obtaining map data by adopting gridding algorithm index and memory mapping analysis;
s3, using a graphic device interface to perform layer superposition and drawing a map;
and S4, calculating the shadow by adopting a gridding shadow algorithm to realize automatic avoidance of the label, and then ending.
As shown in fig. 2, in step S2, the flow of acquiring map data is:
s201, calibrating a desktop coordinate system and acquiring a screen display coordinate range;
s202, converting screen coordinates into a terrestrial coordinate system to display the range of grids;
and S203, rapidly retrieving and loading map big data in a gridding range.
In step S3, the map drawing process includes:
the map is divided into a surface map layer, a line map layer and a point map layer, the surface map layer, the line map layer and the point map layer are drawn according to the sequence of surface-line-point to avoid mutual shielding, the surface map layer is divided into regions, water areas, greening and the like, the line map layer is displayed through different colors, the line map layer is divided into high-speed, national roads, provincial roads, railways, county and county roads and the like, the line map layer is displayed through different colors and widths, the point map layer is divided into mansion, catering, schools, villages and the like, the customizable marks are displayed, the layered overlapping drawing is adopted, the access speed, the application and maintenance efficiency of the map are improved, the map display effect can be enriched, the display, the hiding and the table style of the map layer can be flexibly adjusted in the application process, the map is more humanized, corresponding objects can be displayed under different proportions, the map cannot, hiding content that is not needed to be seen.
As shown in fig. 3, in step S4, the process of calculating the shadow by using the gridding shadow algorithm includes:
s401, converting the range of a desktop coordinate system display grid by a terrestrial coordinate system;
s402, expanding grids and increasing shadow areas;
and S403, converting a desktop coordinate system into a terrestrial coordinate system to confirm the coverage range of the gridding shadow.
Further, the realization process of marking automatic avoidance comprises the following steps:
s404, shielding superposition display among map labels in a grid range, wherein the labels are names of map elements, for example, G4 is a high-speed name;
s405, when the labels conflict, avoidance is automatically identified, when a new label appears in the range of the gridded shadow of the existing label, translation is carried out in the range at the original position, and a proper position is automatically searched.
The invention is well implemented in accordance with the above-described embodiments. It should be noted that, based on the above design principle, even if some insubstantial modifications or modifications are made on the basis of the disclosed structure, the adopted technical solution is still the same as the present invention, and therefore, the technical solution is also within the protection scope of the present invention.
Claims (2)
1. A high-efficiency GIS map engine generation method is characterized by comprising the following steps:
s1, initializing a base number for conversion between a map coordinate system and a desktop coordinate system;
s2, obtaining map data by adopting gridding algorithm index and memory mapping analysis;
s3, using a graphic device interface to perform layer superposition and drawing a map;
s4, calculating a shadow by adopting a gridding shadow algorithm to realize automatic avoidance of the label, and then ending;
in step S4, the process of calculating the shadow by using the gridding shadow algorithm includes:
s401, converting the range of a desktop coordinate system display grid by a terrestrial coordinate system;
s402, expanding grids and increasing shadow areas;
s403, converting a desktop coordinate system into a terrestrial coordinate system to confirm the coverage range of the gridding shadow;
the realization process of marking automatic avoidance comprises the following steps:
s404, shielding superposition display among map labels in a grid range, wherein the labels are names of map elements;
s405, when the labels conflict, automatic identification and avoidance are carried out;
in step S2, the process of acquiring map data includes:
s201, calibrating a desktop coordinate system and acquiring a screen display coordinate range;
s202, converting screen coordinates into a terrestrial coordinate system to display the range of grids;
s203, rapidly retrieving and loading map big data in a gridding range;
in step S3, the map drawing process includes:
dividing the map into a surface map layer, a line map layer and a point map layer, and drawing according to the sequence of surface-line-point.
2. The method for generating the GIS map engine with high efficiency as claimed in claim 1, wherein the specific implementation procedure in the step S405 is as follows:
when the new mark appears in the gridding shadow range of the existing mark, the new mark is translated in the range of the original position, and the proper position is automatically searched.
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| CN109492007A (en) * | 2018-11-09 | 2019-03-19 | 南京天辰礼达电子科技有限公司 | A kind of compacting construction quality fining picture Fast Generation |
| CN109701271A (en) * | 2018-12-24 | 2019-05-03 | 网易（杭州）网络有限公司 | Show the methods, devices and systems of icon |
| CN109977190B (en) * | 2019-04-01 | 2021-03-12 | 中国测绘科学研究院 | Large-scale vector map data-oriented area query processing method and device |
| CN110049499A (en) * | 2019-04-12 | 2019-07-23 | 杭州海兴泽科信息技术有限公司 | Grid partition method based on base station radio signal cover |
| CN110992813B (en) * | 2019-12-25 | 2021-07-09 | 江苏徐工工程机械研究院有限公司 | Map creation method and system for unmanned surface mine system |
| CN111080749B (en) * | 2019-12-31 | 2023-08-15 | 广州供电局有限公司 | Multi-source measurement labeling method and device in power distribution network wide-area measurement control system |
| CN114138868B (en) * | 2021-12-03 | 2022-09-30 | 中科三清科技有限公司 | Method and device for drawing air quality statistical distribution map |
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| DE602006010025D1 (en) * | 2006-03-31 | 2009-12-10 | Research In Motion Ltd | Method and apparatus for the dynamic identification of map objects in visually displayed maps of mobile communication devices |
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| CN104268145B (en) * | 2014-08-21 | 2019-07-26 | 中国科学院遥感与数字地球研究所 | A kind of map fast drawing method of complexity vector data |
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| CN104123314A (en) * | 2013-04-28 | 2014-10-29 | 北京百度网讯科技有限公司 | Labeling avoidance method and device |
| CN105516311A (en) * | 2015-12-09 | 2016-04-20 | 中国农业银行股份有限公司 | Electronic map panorama acquisition method and system |
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