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Tripping Over Your Own Two Feet

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james-fleming
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Most municipality here require SPC information on subdivision plats to help get them accurately into the local GIS. Here is one with the GIS Xrefed in the background.

Obviously one foot is as good as another 😉

This happen so frequently that whenever anyone says that one drawing/data set doesn't seem to match right my first question is always "is it about 60' off and is the E/W error about twice the N/S error?"


 
Posted : November 14, 2017 7:23 am
MightyMoe
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you must have some big numbers, ours only moves slightly, under 10' total.


 
Posted : November 14, 2017 7:52 am
james-fleming
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MightyMoe, post: 455409, member: 700 wrote: you must have some big numbers, ours only moves slightly, under 10' total.

Do you have multiple zones?

We only have one, and due to the irregular shape of the state, the origin is out in West Virginia someplace (god save us if we had to deal with negative numbers). Plus when we went to NAD83 they added a 400,000 meter false easting so the new coordinates would stand out from the old.


 
Posted : November 14, 2017 8:06 am