Friday, December 28, 2007

[Article] How to enable HTTP Compression for OGC WMS XML data

With mobile client, data size is the one of the most important factor. For this reason, XML is not a good data format because of its burden. But thanks to HTTP Compression, now we can optimize OGC WMS XML response data to save bandwidth.

HOW TO enable HTTP compression in popular web servers:
Apache Tomcat HTTP Connector
Apache Module mod_deflate configuration
Enabling HTTP Compression in IIS 6.0

Make sure you enable HTTP Compression for these MIME-Types:

JVNMobileGIS will support GZIP in the next released version.

Friday, November 30, 2007

JVNMobileGIS in Dutch

Dutch is the new language support in JVNMobileGIS. Thanks CathodioN for your great contribution.
Version 1.0.3 is going to be released with Dutch support and some small bug fixes. Wish I have time to support GZIP in next version.

Monday, October 22, 2007

JVNMobileGIS was planned for OSGeo IncCom_Meeting11

From Mr. Frank Warmerdam's email in OSGeo Incubator mailing list:
This puts us in a position with three pending applications and no
slots open. Once a project has graduated (likely OpenLayers shortly)
we will need to select a next project for incubation. The available
projects are:


Details on them all can be found at:
A big day is coming to JVNMobileGIS.

Thursday, October 4, 2007

Live Demo

Now you can run JVNMobileGIS directly from your PC's browser as long as you have Java Runtime Environment installed. Just click on this link. Very easy, right? :)
Thanks mpowerplayer for your nice feature. See LiveDemo wiki page for more information.

PS: I have "HTTP_400 Bad Request" error with this demo. Is there anyone can get map successfully?

Wednesday, October 3, 2007

JVNMobileGIS v1.0.2 - The hotfix version

You may encountered crash in JVNMobileGIS v1.0.1. So sorry for that. This 1.0.2 version fixed some unexpected error and changed the way of configurations loading.

- Hotfix NullPointerException error which caused crashing in v1.0.1
- Fix FullScreen hangup on PPC
- Use configurations from resource bundle, not from JAD file

Wednesday, September 12, 2007

Added to

JVNMobileGIS has been added to database. Expecting more visitor to this project.

Stubborn issue with JVM on PPC

JVNMobileGIS v.1.0.1 was reported crashing when run on PPC ( It may caused by Java Virtual Machine. Why Sun doesn't have JVM for Windows Mobile???
I'm still investigating this bug to find the best JVM to run.

Tuesday, September 4, 2007

JVNMobileGIS v1.0.1 was released with HTTPS, SSL support

We're very happy to announce the release of JVNMobileGIS v.1.0.1, with HTTPS, SSL3 support. It may be the first mobile WMS viewer which can do that :)

  • Fullscreen display
  • Friendly HTTP error message
  • HTTPS, SSL support
  • Pre-defined Landgate WMS data
  • Display "title" in layer list instead of layer "name"
  • Zoom features now is pointer centric
  • Add GetFeatureInfo? menu to MapView?
  • Enhanced Unicode manipulating
  • New released packages location at
  • Some minor changes
Get the lates version from JVNMobileGIS project homepage.

Saturday, August 25, 2007

MOSS4G project

MOSS4G seems an interesting project. I can see opportunity for collaboration between MOSS4G and JVNMobileGIS.

[Incubator] JVNMobileGIS Incubation Application

I have submitted the incubation application on behalf of the JVNMobileGIS project - the cross-platform mobile Java mapping viewer - to OSGeo Incubation Committee. Actually I was encouraged to apply long time ago, but at that time JVNMobileGIS was not ready yet. Now it's time for a bigger opportunity for JVNMobileGIS.

Saturday, August 18, 2007

Working for Milestone 1.0.1

Chris has posted some essential requirements for JVNMobileGIS, the most important (and the most painful) is SSL3, HTTPS support. I'm working on it now. This article from Nokia seems to be the one to go "MIDP 2 0: Introduction to Secure MIDlet Communication (With Example)"

Thursday, July 26, 2007

Collaborate with Mobile Trail Explorer

While searching in Google Codes, I found a project which is very close to JVNMobileGIS - Mobile Trail Explorer. Very interesting! They have what JVNMobileGIS doesn't have: GPS tracking.
I applied for project membership immediately. Thanks Tommy for your fast response and approval. I will try my best to contribute to the project and improve my project as well.
Now I can be a truly developer :) (I hate to be a Team Leader).

Tuesday, July 24, 2007

JVNMobileGIS 1.0.0. is ready for all audiences

Finally, the preparation for public announcement of JVNMobileGIS is finished. The startup version is 1.0.0, still have many things to do.

I would like to invite all of you to come and try JVNMobileGIS. If you are interested in joining this project as a developer, I will be very thankful.

This will be my project of lifetime. Be ready for the next big thing!

Tuesday, July 10, 2007

Prepare to publish JVNMobileGIS project

The progress of preparing to publish JVNMobileGIS project is nearly completed. I'm so excited for this. Will try to make it available soon with many great enhancements in future.
JVNMobileGIS is nearly ready at