[x]
Posted via EE Mobile

Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again.

Question
[x]
Attachment Details
[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

7.8

Converting GPS Longitude/Latitude to OS National Grid Easting/Northing

Asked by Attack_Trax in GIS & GPS Programming

Tags: ostn02, northing, easting

Hi,

I am developing on a Pocket PC using a Teletype GPS adapter. After reading and parsing NMEA sentence data in order to obtain the Longitude, Latitude and Elliposidal Height,  I want to convert these values into a northing and easting so I can display the point on a Ordnance Survey National Grid map.

If I am correct I can use a helmert transformation to convert from WGS84 to OSGB36, before projecting the resulting values to obtain the Northing and Easting. Is this a reasonable way to convert the coordinates?

Apparently this will only offer limited accuracy of up to 5m. On the http://www.gps.gov.uk/ website the OSTN97 & OSTN02 transformations are mentioned giving far greater accuracy. Does anyone know if it is possible to use these transformations, and where the required information can be found?

Many thanks for your time,

AT.
 
Related Solutions
Keywords: Converting GPS Longitude/Latitude to …
 
Loading Advertisement...
 
[+][-]05/17/04 02:32 AM, ID: 11087839Accepted Solution

View this solution now by starting your 30-day free trial. Setting up your free trial is quick, easy, and secure. We will return you to this solution, unlocked, when you're done.

About this solution

Zone: GIS & GPS Programming
Tags: ostn02, northing, easting
Sign Up Now!
Solution Provided By: ark4877
Participating Experts: 1
Solution Grade: A
 
[+][-]06/10/04 01:45 AM, ID: 11277240Administrative Comment

Experts Exchange has a courteous staff of administrators who help members get the most out of the website by means of administrative comments like this one.

Start your 30-day free trial to view this Administrative Comment or ask the Experts your question.

 
[+][-]06/14/04 05:40 AM, ID: 11305679Administrative Comment

Experts Exchange has a courteous staff of administrators who help members get the most out of the website by means of administrative comments like this one.

Start your 30-day free trial to view this Administrative Comment or ask the Experts your question.

 
 
Loading Advertisement...
20091111-EE-VQP-92