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:
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.
I have collected some information for how to install HTTP web server in Android device:
Java HTTP server:
PHP HTTP server:
androphp (PHP & MySQL Web Server)
Some good advice to improve the OpenLayers's perfermence.
If you need add a polyline or polygon to draw a country/state shape in Google Map/OSM, maybe you will get performence problem because of the huge collection of points in your polyline.
After my Android ADT was updated, i found the blackberry apk2bar does not work anymote. It throws always "Android SDK path is not set" Even I have set it in system envrionment.
There is 2 solutions:
1 . As a temporary solution, you can copy all of the files from /build-tools/17.0.0 back to /platform-tools. This will allow our tools (apk2barVerfifier, apk2bar, etc.) to function as expected. You may need to provide the SDK location directly to the tool, depending how you've got things setup.
2. I prefer andhave tested this solution:
One hybrid app with Phonegap 1.9.0 worked fine in Android 3.0 and 4.0, but when I update the OS to 4.1.2, the navigator.geolocation stop working.
Firstly i update the project with new version of phonegap cordova 2.7.0, it does not help. And I found even i test navigator.geolocation in Android native brower, under this demo link:
The gps operation was never be called. And i found many other developers have same problem in new Android OS.
At last I found one solution(not 100%, but at least works now):
My orginal code:
If you open many HTTP connections during the same time in your service in Tomcat, you will probably get such exception: Socket accept failed java.io.IOException: Too many open files.
How to fix:
add this line:
ulimit -n 8192
ulimit -n //this will set unlimit
then restart tomcat and start with 'catalina start', Java will run with the given limit above.