Provide geospatial education and opportunities for all. Using open source GIS "GEO ALOP" is the foundation of open source geospatial The Education Outreach Committee works closely with ICA, ISPR, UN Geographic Information Systems, Agile, UCGIS, IGU and other global partners in our mission Provide geospatial education and opportunities for all.
At the heart of the mission of “everyone to share” is that knowledge is a public good, and open principles in education will provide tremendous opportunities for everyone. While members of our community come from different backgrounds, we all seek to bridge the digital divide, empower all people with full citizenship, and contribute to building open knowledge for the benefit of society and future generations.
Website description
● The development of this new website is to promote the use of open source WebGIS;
● The Chinese version of this tutorial is maintained by OSGeo China Center - Open Geospatial Laboratory;
● The first part of the tutorial is the Chinese translation of the MapServer tutorial;
● The original MapServer tutorial runs in a PHP environment and is currently completely rewritten using Python to generate static websites;
● The development of the tutorial uses some English tutorials and official website cases;
● A separate MapServer server is configured to provide map services;
● Please send any questions and suggestions to bukun (at) osgeo.cn and correct them in time.

MapServer

MapServer was originally an open source WebGIS software developed by the University of Minnesota and the US Space Agency (NASA). MapsServer itself is a program written in C language, providing two development modes, one based on CGI and the other in MapScript mode; You can use any module on the server side to write a WebGIS program. MapServer as a WebGIS solution is object-based, and the basic configuration files The API organization of the MapFile and MapScript modules are object-based. MapServer supports OGC's WMS/WFS service specification by implementing several standards of OGC, supporting distributed access and interoperability. MapServer is a WebGIS platform developed based on the fat server/thin client mode to read geographic data. The GD library is used to render the JPeg/PNG/GIF format image and then sent back to the client browser. MapServer supports multiple platforms such as Windows, UNIX, and Linux. Languages ​​supported by MapScript include Python, PHP, Perl, Java, Tcl, C#, and more.

MapProxy

MapProxy is the Swiss Army Knife for WMS web map services and slice service providers. It caches, accelerates, and converts data services for existing services to any OGC-compliant desktop and web client. MapProxy is flexible to develop and easy to integrate with the Apache environment. MapProxy can also be used as a standalone service. This is the easiest way for new users. The MapProxy example is a basic WMS slice client. It shows the various layers of the configuration. It doesn't have the complex features of changing projections, but it's enough to verify that the service is working.

LeafletJS

Leaflet is a modern, open source JavaScript library developed for building mobile-friendly interactive maps. It was developed by Vladimir Agafonkin, a team of professional contributors, with a small amount of code, but it has most of the features developers develop online maps. The Leaflet design adheres to the idea of simplicity, high performance and usability, and operates efficiently on all major desktop and mobile platforms. The advantages of HTML5 and CSS3 are exploited in modern browsers, while old browser access is also supported. Support for plugin extensions, a friendly, easy to use API documentation and a simple, readable source code.

OpenLayers

OpenLayers is a JavaScript package for developing WebGIS clients. Sources supported by OpenLayers include Google Maps, Yahoo, Map, Microsoft Virtual Earth, etc. Users can also use a simple image map as a background image to overlay other layers in OpenLayers. In this regard OpenLayers offers a lot of options. In addition, OpenLayers' approach to accessing geospatial data is in line with industry standards. OpenLayers supports WMS (Web Mapping Service) and WFS (Web Feature) developed by the Open GIS Association Service service and other network service specifications, which can be done by remote service. Map data published as OGC services is loaded into the browser-based OpenLayers client for display. OpenLayers is developed in an object-oriented way and uses some components from Prototype.js and Rico.

Cesium

WebGL-based front-end 3D JavaScript class library. Cesium launched the 3D Tiles data specification around March 2016, providing LOD capabilities on a glTF basis. Positioning is massive 3D model data in the Web environment. Although the current 3D Tiles is still in the Beta stage, there are quite a few flaws. However, the 3D Tiles data specification began the OGC standardization process on September 30, 2016, and the active component is still very large.