# Distance between coordinates

I placed some cones on a sports playing field and estimated their locations using latitude/longitude coordinates. An example pair of estimated latitude/longitude coordinates is 54.96975, -1.51407.

On average, my estimated latitude was 0.00009 away from the actual latitude. On average, my estimated longitude was 0.0001 from the actual longitude.

Am I able to say, on average, what distance my estimated coordinates were from the actual coordinates?

• so you are trying to measure the bias from actual coordinates to the ones measured? – nickves Feb 13 '15 at 13:08
• You may want to add what gis software you're using in your tags. You may also want to search threads and/or wikipedia about the accuracy of coordinates. When you get past a few decimal places in decimal degrees, you're talking about a very small difference, e.g. en.wikipedia.org/wiki/Decimal_degrees – recurvata Feb 13 '15 at 13:12
• @nickves not exactly the bias, just the average distance in metres between actual and estimated coordinates. So on average, if the latitude was 54.96975, I would estimate the coordinate as something like 5.96980. What distance is this in metres? – luciano Feb 13 '15 at 13:30
• So I reckon, on average, I was about 10m out. Sound about right? – luciano Feb 13 '15 at 13:32
• How did you "estimate" and how did you "know" the lat-lon coordinates? Also, please edit all extra information into the question. – Martin F Feb 15 '15 at 1:22