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Show Us Map! 45 Minutes to Build Your Own 3D City Map Server with SUAS MapServer 3

The tranditional 2D Web GIS can not satisfy the people, who are toughing new technique everyday. The 2D map has many better features such as rapid speed, non-client and easy to be implemented, but with the fast renovation of hardware and internet, those features have lost their adventage to 3D map. MSN, Google Map have supported 3D online map and many GIS companies have also released many powerful desktop softwares to help the users to update their 2D data or build 3D model based on forehaved 2D data.

Such as ArcView 3D Analyst:

Show Us Map! 30 Minutes to Build Your Own Map Server with SUAS MapServer 3

Have you used Google Map? Are you potty about its amazing and powerful functions? Would you like to have one such map server, even you are not a Giser or just know a little bit of GIS technique.

If you are working in GIS field, and you want to build your map server to deliver your map data, but UMN Map Server is too difficult to install and config, and too complex to use and make you headache. Of course, the UMN Map Server is a nice and strong tools, but you don't wanna wasting time to learn a lot of tutorials before the installation.


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1 换个思路理解 DID

在软件建构领域,有一个原则叫DID, 通常用来保证资源和时间的最小化。


  • 设计(Design)20倍的容量。
  • 实现(Implement)3倍的容量。
  • 部署(Deploy)1.5倍的容量。


换个思路,在需求开发与系统设计层面出发,也应该遵循这种规律,即在前期设计层面下足功夫,用更周到的设计来实现 方案,以便在部署上线后的改动最小。

但是,往往在实际开发中这个过程都是本末倒置的,从 ‘拍脑袋就做’ 到 ‘开发中发现行不通’ 到 ‘返工’,或者更严重的上线 之后才发现问题,导致更大的返工成本。

2 过度设计



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2018 年 5 月 25 日,本月底,号称欧盟史上最严格的数据保护法GDPR(General Data Protection Regulation,欧盟通用数据保护条例)将执行。我的IT朋友圈很早就在讨论相关问题,以及可能带来的影响。





quartz 2.3.0 compatible problem with Shiro 1.4,0

My project should work with 2 plugins: quartz2 and Shiro.
When I run the project, Quartz2 cannot find implementations or methods from Quartz2 and project cannot be built. Strange is that project always includes one quartz-1.6.1.jar from org.opensymphony.quartz lib in libs, besides the quartz-2.3.0.jar.

From this dependency list from Schiro, you can find org.opensymphony.quartz 1.6.1:

This is the reason!



What's the difference between MyISAM and InnoDB?

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The main differences between InnoDB and MyISAM ("with respect to designing a table or database" you asked about) are support for "referential integrity" and "transactions".

If you need the database to enforce foreign key constraints, or you need the database to support transactions (i.e. changes made by two or more DML operations handled as single unit of work, with all of the changes either applied, or all the changes reverted) then you would choose the InnoDB engine, since these features are absent from the MyISAM engine.

Build Android OS

Creating a Virtual Windows Phone 8 Development Environment

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Just follow the steps in the tutorials, the most important thing is editing your your_vm_name.vmx and append the items:

hypervisor.cpuid.v0 = "FALSE"
mce.enable = "TRUE"

These options that you provide tell your VMware configuration not to report to the Hyper-V that it's running in a virtual machine


Mobile Offline Map Client with Cordova hybrid HTML5

Mobile Offline Map Client, is it necessary? Yes, if you work outside but there is not network or wifi, but you still need WMS to display the map and WFS to edit the feature, offline functionality will help.

After research and inspired by other ideas, /?q=en/node/72475

Then the mobile offline hybrid HTML5 map client is born, frameworks or plugins it used:

1. OpenLayers: Go
2. Sencha-touch: Go


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