Today I uploaded some static work done in south Louisiana in the south zone to OPUS, and let OPUS select the zone automatically. It kept coming up in Louisiana North until I selected it manually. Am I missing a toggle or something, or is it a common OPUS anomaly?
OPUS usually always gets it right. I had one two weeks ago that came back PA South and I thought OPUS was wrong. Not so it was me, a County I had never surveyed in before and have GPSed two more sites in that County since.
I sent the second job off on Friday, will complete field work on third one in about 2 hours tomorrow and then start back on field work on the first and biggest one. Same client switched his priorities. In PA the N-S break follows County Lines so it is not straight E-W.
Paul in PA
Paul in PA, post: 426253, member: 236 wrote: OPUS usually always gets it right. I had one two weeks ago that came back PA South and I thought OPUS was wrong. Not so it was me, a County I had never surveyed in before and have GPSed two more sites in that County since.
I sent the second job off on Friday, will complete field work on third one in about 2 hours tomorrow and then start back on field work on the first and biggest one. Same client switched his priorities. In PA the N-S break follows County Lines so it is not straight E-W.
Paul in PA
I would think that PA would have split to east and west zones. I would have thought Alabama would do north and south zones. I am not sure why they did not merge Mass Mainland and Mass Island zones.
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spledeus, post: 426258, member: 3579 wrote: I would think that PA would have split to east and west zones. I would have thought Alabama would do north and south zones.
The goodness of fit depends more on how far a projection must cover from the central line (Transverse Mercator meridian or Lambert parallel) than it does on the length of the central line. So you will see a lot of states sliced into long narrow zones rather than squarish zones.
Bill93, post: 426269, member: 87 wrote: The goodness of fit depends more on how far a projection must cover from the central line (Transverse Mercator meridian or Lambert parallel) than it does on the length of the central line. So you will see a lot of states sliced into long narrow zones rather than squarish zones.
Understood. I usually do not work with much scale factor. It makes my intuition revert to standard traverses which are usually not as happy to be long and skinny.
Still does not answer the Mass Mainland vs. Island Zones...
I thought the decision came down to OPUS deciding on SPZ output relative to the zone the CORS belong too. It's common in Denali when one or more of the CORS used are in the neighboring zone.
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