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The above setgriditem (pdispinfo); this function is a defined function for displaying data. pdispinfo points to the struct.
For GIS software, attribute data display is an important issue. In the underlying GIS development based on VC ++, clistctrl or DBGrid is generally used to display attribute data. However, if the display efficiency of these controls is relatively low or the effic
I. Overview
Interactive Drawing, I understand, is to draw a graph with the mouse.
Interactive plotting is often used in GIS software development and design. For example, ArcGIS and other software have very complex human-computer interaction functions. Interactive plotting occupies an important position in GIS.2. object-oriented modeling of Elements
In interactive drawing, you can view the elements of the dr
After creating a scenario in cityengine, We need to export the created model (in 3DS and OBJ formats ).
You can select two export modes: Use File size limit and create one file per shape.
Use File Size Limit: export the selected model as an OBJ or 3DS file.
Createone file per shape: exports the model according to the shape. A 3DS or OBJ file is generated for the model generated by each shape.
Figure 1Export Method
Next we will discuss the naming of model files when exporting models using the cr
Development of GPS/GIS in the Windows Mobile Development SeriesArticleFavorites, including basic GPS knowledge, longitude and latitude, use of navigation devices, development of related applications in C ++/. net, and practical application of GPS systems.
GPS Basics
GPS application knowledge
GPS-Baidu encyclopedia
GPS book Daquan
GPS GIS
What do you know about GPS longitude and latitude?
GPS-W
After six months of study and debugging, I finally wrote a simple GIS. On the ARM development board, I chose QT/Embedded 2.3.7 as the graphic development interface. I debugged the touch screen yesterday, finally, a little result is coming out. I'm very happy. I just published a message to celebrate it.
Many people ask me for code reference, but because it is a project, it cannot be used for reference. Sorry. In addition, if you need to find a refer
Problem cause
Many simple operations are often required in the second GIS development.Code, To a general scale, to a custom tool (usertools) similar to MapX, or some analysis functions in Supermap object. These functions are implemented inProgramDifferent processes and events, not only every time the writing is troublesome, but also difficult to maintain. In the article "Designing reusable large-granularity GIS
Original GIS basic software and operation (11)Practice Xi. 3D Visual analysis1, the geographical data for perspective observation, three-dimensional browsing;2. Make flying animationGIS data three-dimensional display(1) Run the program: [Start menu]>>[All Programs]>>[arcgis]>>[arcscene], open ArcScene(2) Execute the command in Arcscene: [Custom]>>[Extension Module], select the [3D Analyst] Extension module, click the [Add Data] button in Arcscene (as
Original GIS basic software and operation (12)Exercise 12, ArcMap cartography-map layout design
Set map symbols-use of various rendering methods
Create thematic maps using the ArcMap layout interface
Add various map elements to the map layout
Tip: Always keep your map document in mind during the following exercisesRender layer Features-unique value symbolsCreate a new map document in ArcMap, load [spatial analyst] extensions and
Original GIS basic software and operation (vi)Practice VI. Application of spatial analysis1. Deepen the understanding of the basic principles and methods of buffer analysis;2. Master the technique method of creating buffer distance drawing.3. Master the ability to use the buffer analysis method to solve the geo-spatial analysis problem.1. Distance mapping-creating buffersData preparation: Layer file point.shp,lline.shp,polygon.shpBuffer analysis for 1
and longitude coordinates and Baidu metric coordinate with each other conversion.3. Map Service Open SourceUse a proven open source GIS solution: GeoServer (server) +tomcat (middleware) +postgis (database) +udig (desktop) for map editing, storage, publishing, and service.We are not only limited to the use of existing open source software, based on a number of optimizations and improvements:(1) Customized two times based on GeoServer, such as trajecto
data are mainly remote sensing satellite data, covering major domestic and international satellites, as well as relevant scientific research data.Current key data resources include:1. Domestic satellite data: Resource series, high score, meteorology, ocean, environment, fast boat, Beijing, etc.2, foreign satellite data: Landsat series, MODIS (Aqua\terra), EO-1, IRS-P6, ENVISAT-1, ERS-2, RESOURCESAT-1, etc.;3, scientific research data;Note: Try to download in here, found to be the next order to
relatively simple system, just iffy a little bit of meaning, and even a little learning or innovation meaning.Plus the last published part of the paper, so the whole system is a complete complement. The original thesis part please see: Campus Webgis Development and Practice (thesis part) http://www.cnblogs.com/Tangf/archive/2006/01/13/316918.htmlFeature one: Put forward the concept of map interface (in fact, the idea was to transfer the so-called enterprise annotation on the network to the syst
The HT for Web, as the logical topology graphics component itself, does not have GIS capabilities, but can be fused with a variety of GIS engines, namely its client components, to achieve seamless integration of logical and physical topologies, and this chapter will specifically describe the HT for Web and development free Openlayers map combined with the application of key technology points, the introducti
Building information Modelling what is BIM? There are divergent opinions, the joy of pulling. The definition is a very difficult thing, the most error-prone answer is: through three-dimensional design + modeling + effects + virtual reality + Collaborative Design + system development, the impact of the project's entire life cycle, making ... Thus... At last...However, chatty's answer can only be to avoid making mistakes, and not to reflect the true interpretation of their meanings. Relative defin
Spatial Query and analysis are at the core of GIS, and most of the daily tasks of GIS engineering projects are related to query. GIS Query types can be divided into three types: simple attribute query, spatial location-related query, and joint query related to spatial location and attribute. In this topic, we will detail how to perform these three queries in Supe
When it comes to map making, many people will hook up with cartography the first time. Yes, many theories and ideas about cartography are well suited for GIS-based mapping. It can be said that the use of GIS for electronic map production, in fact, is also a small part of cartography.Cartography is a subject that studies the theory of map, the technique and application of map compiling. This science can be s
Currently, most of the GIS applications in China are under secondary development. Because for applications, the advantages of secondary development are obvious.1. ConvenienceSecondary Development has a low technical level. What we need to achieve is not the GIS technology, but the specific application of all implementations.Service. On the basis of understanding the business, it is convenient to use the
TrigonometryAnd spherical trigonometry. Let me surprise you: this stuff is overused. In your cases trigCan be avoided altogether by using simpler, but slightly more advanced, techniques, especially basic vector arithmetic.
ElementaryDifferential geometry. This is the investigation of smooth curves and surfaces. It was specified ted by C.F. gauss in the early 1800's specifically to support wide-area land surveys, so its applicability to GIS is obvious
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