Earth's Largest Surveyor Network

# scale factor calculation

how can i calculate scale factor in this following case

gps length is 103.453m(wgs84)

but true length is 103.395(by total station)

pls help me

This Content Originally Published by a land surveyor to Land Surveyors United Network

Views: 12744

### Replies to This Discussion

GPS to True = 103.395 / 103.453 = 0.99943936
GPS distance x 0.99943936 = True distance

Is this what you needed?

thank you Jim

this used a temporary benchmark

Dear Jim,

I have a relevant question.

I have a list of GPS control points. and I am trying to make a traverse using Toral station.

but each one of the points hasÂ a different scale factor.

isn't the scale factor suppose to be calculated from the distance between two points as in the question above?

in this case, should I measure the distance from the siteÂ and calculate a new scale factor or use one of the scale factors which is on the list or calculate an average of them?

Jim's looks good! Â here is a scale factor calculation tool I found as well that may help in the future Â http://webpages.charter.net/sinkwich/sdventure/html/sd_scalecalc2.htm

Where Thousands of Professional Land Surveyors, Students of Surveying and Educators are United through Collaborative Knowledge and Purpose.

## Surveying Knowledge Share

Search Here:
Search over a million pages of shared surveying experiences from all corners of Earth!

 âž•Add Photos âž•Add Videos âž•Add a Discussion âž•Add a Blog Post Find a Surveyor Join a Hub Donate Mobile Rover *Apps Open In Window: Surveyor Chat Search LSU Your Weather Converter Video Chat Member Map Support Guides

## Tools,Apps and Quick Guides

+LandSurveyorsUnitedon

## Dedicated to the Memory of Skip Farrow (1953-2015)

Drag Button to bookmark bar and view submitted links here.Will soon be moved to a directory

## Location Based Surveying Practices

Land Surveyors United is the world's FIRST Global Social Network for geospatial professionals. We have dedicated, geolocated support groups for practically every country, continent and state on earth, for you to utilize for building your personal network. We are all essentially concerned with the same issues, no matter where we are located on earth. However, surveying practices and methods vary depending on the geographic location where we work. If you have noticed similarities and differences between the conditions, laws and practices between two or more areas of the world,discuss it in this forum. Build your reputation online by posting relevant discussions in your local group below.

### Join and Introduce Yourself in Your Local Geosocial Forum:

Not based in the US? Here are other groups for surveyors around the world to join and contribute knowledge and experiences as a land surveyor:

And more... Find your group forum based on location.

what where
job title, keywords or company
 city, state or zip

PLEASE DONATE TODAY. Your generosity preserves surveying and mapping knowledge for future generations. Thank you.