There have been several discussions of this topic that show up in a search:

I think I found the right properties on the GIS, just west of where two former railroads crossed, but the shapes don't all match that survey, so some ...

Now at my desk computer, I can see this is in Otsego Co., NY, just east of Oneonta and at the Delaware Co. line.

Bump. This post must have been too far down the list when the new poster was approved, so nobody saw it. Having the traveled way shown on a document ...

If you maintained a constant heading east (constant latitude), yes you go north of the target. But the great circle, shortest path, goes to higher lat...

I would think great circle, which the above numbers represent. That way you are always heading for the shortest path to the destination. The compass h...

I have 4000sse receivers. I started with the sst but it does not meet the project requirements.?ÿ I was able to get some shaky OPUS positions with it...

The goal was to submit to OPUS Share for the NGS GPSonBM program.?ÿ OPUS only uses GPS for now.

The 4.5 hour session with the antenna 1.5 meters above the mark, compared to the first one at 0.5 meter, was only slightly better in observations used...

You also need to know the current magnetic declination at your location.?ÿ The magnetic pole is not the same as the geographic pole. For that lat/lon ...

Truncated usually refers to dropping least digits. To be clear this example should specify truncate high order digits. But the right way I think is t...

I raised the antenna to 1.5 m and rigged an additional brace at 90 degrees from the first using a second tripod. I'm collecting data right now. After...

?ÿAs a rule of thumb, anything that wouldn't readily heat up in a microwave oven is nearly transparent to the GPS signal. I think that includes cloth....

I've been fascinated by the first few I watched. I couldn't have kept up with you on those slopes even when I was your age, and my eyes were never as ...

No military installations that I know of in the area, and this week's test session with no problem was much closer to the major defense contractor.

I can't rule that out, but there are no suspects in plain sight. To test that, I guess I could simultaneously run my second receiver a few meters to ...

Since a pole can't sit on the center of the disk with the cannon in the way, I have to rig something non-standard to center the antenna over it. If I ...

4.5 hours.?ÿ And I don't think shortage of satellites was a problem. Why would it help to block satellites that it isn't going to receive? I can perh...

I argue that we are happy with 1 cm vertical error on the GPS session, and any construction level used with care can transfer elevation with an error ...