Help for cover letter

I am not an English speaker and I really need help for my phd application cover letter. Any instruction would be appreciated.

Dear Dr. xxx,

It is with great pleasure that I submit my application for PhD program in the Department of Geography at xxx. I will graduate in December and am looking for 2014 fall admission under your supervision. I was very excited when I saw your webpage and research interest in October and contacted you immediately.

During undergraduate studies, my courses have covered software programming and fundamentals in GIS. Then in master degree, I continued GIS study in Geography and Geology department in xxx University supervised by Dr.xxx.

For the past two years, I worked as GIS technician and application developer in xxxx, where I developed several GIS web applications in a multi-tasking environment. The development experiences greatly extended my programming skills and provided me valuable understanding of GIS toolsets and technologies.

I found my interest in web-based GIS decision analysis after two years of hands-on working in GIS. By providing innovative application, I believe WebGIS-based application can enhance public participation and equity of access, and thus bridge the gap between experts and the public for planning and decision-making issue. For my graduation thesis, therefore, I am conducting an independent research on a web based decision support application for local community planning. My expectation for this project is to enhance my GIS and programming skills and, more importantly, prepare me for future research in this area of study.

I am confident that I have the capability and potential to pursue PhD degree at xxx. I am looking forward to talking to you about my future program study and possible research project.

Please also find my writing sample and resume.

Thank you for your consideration.
Sincerely,
xxx