How do you display latitude and longitude on a survey map. I am looking to do so, and I know these values are somewhat imprecise unless displayed to fractions of a second.
I did a little experiment in my CAD computer entering the values for latitude and longitude with differing precision. I am in NAD83 Massachusetts Mainland Zone for this test.
Historic boundaries and conservation efforts.
I've never plotted Lat-Long on a plan, just state plane coordinates. I vote for the 0.001" style, as it gets you to the precision where you can convert to SPC reliably to 0.01' representation.
I agree. My OPUS solution report has five decimal parts of a second.
Historic boundaries and conservation efforts.
As a general rule, 0.0001 seconds ~ 0.01 feet of difference, at least around here.
I tend to follow the lead of the NGS and run things out to five decimal places for seconds.
On a plat for a section corner tie I show .001” which is roughly 0.1’, really within .05’ because of rounding. Show epoch and understand that it’s an L,L,T number.
Express it with the number of digits that are significant - the last digit is somewhat uncertain.
And be sure to give full metadata.
Thank you everyone. I can only make my software display four decimal parts of a second. I display a chart on the map of the State Plane coordinates along with the latitude, longitude and metadata.
Historic boundaries and conservation efforts.
I can only make my software display four decimal parts of a second.
What software are you using?
I don't want this to become a discussion about which brand is better, however, I did find that using a different part of the software can get more decimal parts of one second in the latitude and longitude values.
Historic boundaries and conservation efforts.