lightweight gis

I had nothing to worry about this afternoon. I accidentally reviewed the mysql manual. I used to check the content of the manual very well, the focus is on some basic details of SQL statements, mysql performance parameters, and storage control management. However, today I accidentally discovered an important feature of mysql, that is, mysql also stores spatial data related to gis. I had nothing to worry about this afternoon. I accidentally reviewed th

2.5 Comparison of vector and raster data structuresEarly in the development of computer-aided cartography and GIS, vector processing technology was originally quoted, and raster data processing began in the middle of the 70 's. A few years ago, these two data structures were hard to be compatible, so they caused a lot of inconvenience to the use of data. In recent years, it has become more and more clear that the differences between grid and vector da

This is an experiment that I did when I first came into contact with the Google map API last year. I didn't do any further work in the future, but I wrote a draft and kept it in my blog post. Although some ideas are naive, there are even some errors. Today it seems that there are still some reference values, so I will release the draft for you to have a look. The original text is as follows: 0. Description After some time of thinking, I recently tried a "Google map online vector Interoperabi

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

Sramana Mitra pointed out in the article that web3.0 is defined as Web 3.0 = 4c + P + vs (4C: content, commerce, community and scenario; P: Personalization; vs: vertical search ). As a result, Will personalization become a new breakthrough in the development of geographic information? I think so. Goodchild also raised the concept that everyone is a sensor. The intention should be similar. Various spatial analysis algorithms have been well developed for the development of

I-gis Geoscene3d v10.0.11.495 Three-dimensional geological modeling softwareGeoscene3d enables the visualization of large amounts of earth science data. such as deep wells, geophysical data, soil and water chemistry, topography surfaces and geological layers. In addition, you can use software to build geological models in a well-defined modeling process. From a manual or semi-automatic generation layer interpretation point, the layer surface is genera

In the past two years, we have seen the saying that GIS is integrated into the it mainstream from time to time. At least one piece of information can be reflected, and the GIS industry is out of touch with the IT mainstream. One link to this gap is the architecture of the software or system. The system here refers to the so-called "enterprise software" applied to a department or industry, or the management

Any theme in the material world is firmly branded with time and space. More than 80% of people's production and life information is related to geographical location. Geographic Information System (GIS), as an important tool, technology and discipline for obtaining, processing, managing, and analyzing geospatial data, has received wide attention and rapid development in recent years. From the perspective of technology and application,

Today, I took a look at the technical support post written examination questions of digital in Wuhan. One of the questions (attributes of GIS data include ___ ____) is my professional knowledge, but I cannot say it myself, the information is summarized as follows. GIS data includes spatial data and attribute data. Spatial data mainly describes the location information of spatial objects. Generally, the co

The most important thing for ESRI in was the launch of ArcGIS engine9.2. I only read the desktop and engine sections of this version, which is really amazing, especially ArcGIS Engine, A large number of new elements, components, and technologies have been added to reduce the development process and difficulty. The launch of this version makes the Basic Books on ArcGIS on the market outdated and need to be updated. In, I personally used ArcGIS Engine to make a fewProgramMy personal satisfaction

Those who are interested in WebGIS and open-source GIS software have translated the book "GIS for Web Developer" (Scott Davis, progmatic Press) introduced by the Electronic Industry Press's liberal arts viewpoint, this is a book on open source software of WebGIS. It introduces some basic concepts of GIS, open source tools of