CN100386723C - GIS universal symbol system based on virtual machine and construction method thereof - Google Patents
GIS universal symbol system based on virtual machine and construction method thereof Download PDFInfo
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- CN100386723C CN100386723C CNB2006100188730A CN200610018873A CN100386723C CN 100386723 C CN100386723 C CN 100386723C CN B2006100188730 A CNB2006100188730 A CN B2006100188730A CN 200610018873 A CN200610018873 A CN 200610018873A CN 100386723 C CN100386723 C CN 100386723C
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Abstract
The present invention relates to a GIS universal symbol system based on a virtual machine, which comprises a symbol language, a symbol compiler, symbol integrated development environment and a symbol virtual machine, and a GIS is a geographical information system. The present invention also relates to a method for building a GIS universal symbol based on the virtual machine, the method shields the particular difference of GIS platforms by utilizing the symbol virtual machine and provides a uniform interface for the realization of a symbol library, and the symbol library can be universal on different GIS platforms. The present invention has the advantage that the particular difference of the GIS platforms is shielded by utilizing the symbol virtual machine, the uniform interface is provided for the realization of the symbol library, and therefore, the same symbol library can be universal on different GIS platforms.
Description
Technical field
The present invention relates to message area, particularly a kind of GIS universal symbol system and construction method thereof based on virtual machine.
Background technology
At present, various Geographic Information System (GIS) software platform on the market has all been realized map symbol separately, but these map symbols do not have versatility just at specific platform design, and the symbol at a kind of platform design can not use on another kind of platform often.And design a cover symbol is a job of wasting time and energy very much, thereby is badly in need of a kind of general notation.
Summary of the invention
Technical matters to be solved by this invention is: a kind of GIS universal symbol system and construction method thereof based on virtual machine is provided, and it is applicable to the computer software relevant with GIS and electronic chart.
The present invention solves its technical matters and adopts following technical scheme:
GIS universal symbol system based on virtual machine provided by the invention, it comprises symbol compiler, glossary of symbols IDE and symbol virtual machine, GIS is a geography information.
The invention provides a kind of method that makes up the Geographic Information System general symbol(s) based on virtual machine, that is: utilize the symbol virtual machine to shield the difference of concrete GIS platform, for the realization of symbolic library provides unified interface, realize symbolic library method in common on different GIS platforms.
Advantage of the present invention is: shielded the otherness of concrete GIS platform by the symbol virtual machine, for the implementor of symbolic library provides unified interface, thereby realized same symbolic library general on different GIS platforms.
Embodiment
Provided by the invention based on virtual machine structure GIS system of universal symbol, it comprises symbol compiler, glossary of symbols IDE and symbol virtual machine.Wherein:
Symbol compiler: being compiled into the object code that can on the symbol virtual machine, move by being specifically designed to the source program that the programming language of writing symbol writes, this object code is exactly to have realized general symbolic library on the GIS platform of symbol virtual machine at all, describe for convenient, below will " be specifically designed to the programming language of writing symbol " and abbreviate vmSymbol as.
Glossary of symbols IDE: the integrated programming environment that is meant vmSymbol, comprise editing machine, compiler, grammer color separation instrument with source program editing function, location of mistake instrument and patterned symbol preview instrument, the user can directly carry out the preview of symbolic library editor, compiling, debug and symbol in this integration environment, and generates final symbolic library.
Symbol virtual machine: when the GIS platform software need carry out symbolism to map, it just gives the task of symbolism the symbol virtual machine at this GIS platform, the symbol virtual machine then carries out the symbolism of map datum by the instruction in the DO symbol storehouse, so just shielded the otherness of concrete GIS platform by the symbol virtual machine, for the implementor of symbolic library provides unified interface, thereby realized same symbolic library general on different GIS platforms, for example: can (comprise MapObject at ArcGIS, ArcObject, ArcEngine), 2.0 3 GIS Platform Implementation of GeoStar and CMICS the symbol virtual machine.ArcGIS is the GIS Software Development Platform of ESRI (the Environmental Systems Research Institute Inc of U.S. environment system research institute) exploitation, GeoStar is the GIS software platform of Wuhan military very lucky information engineering technology difficult to understand company limited exploitation, and CMICS is the urban managing information acquiring system platform of the common exploitation of the military very lucky information engineering technology company limited difficult to understand in Wuhan University and Wuhan.
The present invention also provides the method that makes up the Geographic Information System general symbol(s) based on virtual machine, that is: utilize the symbol virtual machine to shield the difference of concrete GIS platform, for the realization of symbolic library provides unified interface, realize symbolic library method in common on different GIS platforms, this method adopts the following step
(1) in the glossary of symbols IDE, carry out the writing of symbolic library source program, compile, debugging and preview, and generate symbolic library.
(2) GIS software loads the symbolism virtual machine at this GIS platform in initialization procedure.
(3) required symbolic library is also loaded in symbol virtual machine initialization oneself as required.
(4) when GIS software need carry out symbolism to data, it delivered the symbol virtual machine with data, is gone the task of DO symbolization by virtual machine.
(5) the symbol virtual machine carries out symbolism by the symbolic instruction in the DO symbol storehouse to data.
The invention will be further described below in conjunction with the enforcement of general symbol(s) in the Wuhan urban grid management system.
Have two places to use electronic chart in the urban grid management system of Wuhan: one is the information management system of moving on PC, and it carries out map with MapObject and shows; Another is the information acquisition system that operates on the Smartphone (smart mobile phone), and it carries out map with the embedding generalized information system (CMICS 2.0) of our independent development and shows.They all use the same symbolic library of making based on the notation of virtual machine that map datum is carried out symbolism, and have reached consistent effect; Different is, a usefulness be symbol virtual machine at MapObject, a usefulness be symbol virtual machine at CMICS 2.0.During concrete enforcement, in the glossary of symbols IDE, carry out earlier writing of symbolic library source program, and compiling generates needed symbolic library; Load symbolic library at the different virtual machine of different platform invokes then and carry out symbolism.
For virtual machine, the virtual machine of different GIS platforms is different, but the core of all virtual machines is identical, its core is exactly to take out corresponding instruction and carry out one by one from symbolic library, and different is each concrete GIS platform may be different to the implementation of the method for calling of virtual machine and drawing for order.Therefore, we can realize a public core virtual machine earlier, and its function is exactly to load symbolic library and can carry out wherein instruction, and core virtual machine provides following 5 function interfaces, are expressed as follows with the form of C language:
①int?getSymbolCount(int?type)
// be used for obtaining the number of symbolic library symbol, wherein type can equal 0,1,2 respectively expression obtain the number of point, line, surface symbol.
②bool?getSymbolName(int?type，int?index，char?name[]，int?length)
// being used to obtain the title of symbol, type is a Symbol Type, and index is the index of the symbol in the symbolic library, and name deposits the name of the symbol that returns, and length is the length of name.
③bool?drawMarkerSymbol(int?index，int?x，int?y，int?size，COLOR?lineColor，COLOR?fillColor，int?lineWidth，float?angle)
// being used to paint point symbol, index is the index of point symbol, x, y is the position of point symbol, and size is the size of point symbol, and lineColor and fillColor are respectively the line and the fill color of symbol point, lineWidth is the width of line, and angle is the angle of point symbol rotation.
④bool?drawLineSymbol(int?index，POINT?points[]，int?count，COLOR?color，intlineWidth)
// being used for the line drawing symbol, index is the index of line symbol, and points is the coordinate of line symbol, and count is the number of coordinate, and color is the color of line, lineWidth is a live width.
⑤bool?drawFillSymbol(int?index，POINT?points[]，int?partCounts[]，int?numParts，COLOR?lineColor，COLOR?fillColor，int?lineWidth)
// be used to paint the face symbol, index is the index of face symbol, points is the coordinate of face symbol, partCounts and numParts further make an explanation to coordinate, be used for illustrating that this face symbol is made up of several parts, what points are every part have, and lineColor and fillColor are respectively line and fill color, and lineWidth is a live width.
All all realize symbolism to map datum by these 5 function interfaces that call core virtual machine at the virtual machine of concrete GIS platform; The virtual machine then left at concrete GIS platform as call back function when carrying out drawing for order (as moveto, lineto, polygon etc.) of core virtual machine goes to realize in addition.Therefore when the virtual machine of realizing at concrete GIS platform, solve two problems, the one, how to call core virtual machine, the 2nd, how to realize the call back function of drawing for order.
Embodiment in conjunction with two virtual machines in the Wuhan urban grid management system is described further again:
Embodiment 1:
The enforcement of MapObject symbol virtual machine: when realizing the symbol virtual machine of MapObject, since MapObject allow the user by COM from define symbol, as long as we realize a com component that meets MapObject symbol interface, call core virtual machine in this com component the inside, just solve problem how to call core virtual machine.
For the call back function of realizing drawing for order,,, we just can realize these call back functions on the HDC of Windows as long as calling the GDI function of Windows because MapObject draws.
Embodiment 2:
The enforcement of CMICS 2.0 symbol virtual machines: because CMICS 2.0 is independent developments, its symbolism work is exactly directly to call core virtual machine to realize, thereby just very directly perceived to how calling core virtual machine; For drawing for order also is that the GDI that calls Windows realizes.
The foregoing description is limitation of the present invention not, and it is only for reference, is used for further understanding of the present invention.
Claims (3)
1. a GIS universal symbol system is characterized in that making up the GIS system of universal symbol based on virtual machine, comprises symbol compiler, glossary of symbols IDE and symbol virtual machine, and GIS is a Geographic Information System,
Symbol compiler: being compiled into the object code that can on the symbol virtual machine, move by being specifically designed to the source program that the programming language of writing symbol writes, this object code is exactly to have realized general symbolic library on the GIS platform of symbol virtual machine at all, describe for convenient, below will " be specifically designed to the programming language of writing symbol " and abbreviate vmSymbol as
Glossary of symbols IDE: the integrated programming environment that is meant vmSymbol, comprise editing machine, compiler, grammer color separation instrument with source program editing function, location of mistake instrument and patterned symbol preview instrument, the user can directly carry out the preview of symbolic library editor, compiling, debug and symbol in this integration environment, and generate final symbolic library
Symbol virtual machine: when the GIS platform software need carry out symbolism to map, it just gives the task of symbolism the symbol virtual machine at this GIS platform, the symbol virtual machine then carries out the symbolism of map datum by the instruction in the DO symbol storehouse, so just shielded the otherness of concrete GIS platform by the symbol virtual machine, for the implementor of symbolic library provides unified interface, thereby realized same symbolic library general on different GIS platforms.
2. GIS universal symbol system according to claim 1 is characterized in that at ArcGIS, GeoStar and 2.0 3 GIS Platform Implementation of CMICS symbol virtual machine; Wherein, ArcGIS is the GIS Software Development Platform of U.S. environment system research institute exploitation, GeoStar is the GIS software platform of Wuhan military very lucky information engineering technology difficult to understand company limited exploitation, and CMICS is the urban managing information acquiring system platform of the common exploitation of the military very lucky information engineering technology company limited difficult to understand in Wuhan University and Wuhan.
3. the construction method of a GIS universal symbol system, it is characterized in that a kind of method that makes up the Geographic Information System general symbol(s) based on virtual machine, that is: utilize the symbol virtual machine to shield the difference of concrete GIS platform, for the realization of symbolic library provides unified interface, realize symbolic library method in common on different GIS platforms, this method adopts the following step
(1) in the glossary of symbols IDE, carry out the writing of symbolic library source program, compile, debugging and preview, and generate symbolic library,
(2) GIS software loads the symbol virtual machine at this GIS platform in initialization procedure,
(3) required symbolic library is also loaded in symbol virtual machine initialization oneself as required,
(4) when GIS software need carry out symbolism to data, it delivered the symbol virtual machine with data, went the task of DO symbolization by virtual machine,
(5) the symbol virtual machine carries out symbolism by the symbolic instruction in the DO symbol storehouse to data.
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| CN102402529A (en) * | 2010-09-13 | 2012-04-04 | 方正国际软件有限公司 | Map plotting control method and device |
| CN106201444A (en) * | 2015-04-29 | 2016-12-07 | 南京南瑞继保电气有限公司 | A kind of generic Extensible programmed symbol modeling method |
| CN106384560B (en) * | 2016-09-12 | 2017-12-15 | 湖南新航动力信息科技有限公司 | icon processing method and system based on map |
| CN106568377B (en) * | 2016-11-07 | 2019-07-23 | 武汉大学 | Tectonic geodetic survey drawing methods and system based on ArcEngine |
| CN109931933B (en) * | 2017-12-15 | 2022-10-28 | 中航(成都)无人机系统股份有限公司 | Task planning and navigation drawing method based on GIS platform |
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