I do all of my surveying with a total station, but I am working on a project that does not let me close my loop because terrain is to harsh to survey through. I need to measure a point at the end to make sure my line is correct before I set corner poles. I don't have a gps system, but I know someone that would rent me one, Trimble R8 m3 receiver and a data collector. Is it possible to take a static shot with just one receiver? I have read up on taking static points and it talks about the baseline. Or what does it refer to when it talks about the base line? I am working in Belize, does OPUS work for points taken outside of the United States? Any advice I could get would be greatly appreciated.
You're going to at least have 2?ÿStatic units, and a control point with published coordinates. I'm a seasoned surveyor up in age. Good heath. I work for a dot. So me buying new gps equipment just doesn't make sense. I still survey for myself from time to time. I own 3 L1 Static units. You also so have to have post processing software. Here's the skinny. You have to set 1 unit up on the known?ÿcoordinate monument (point), then set your baseline points, and collect data. The control point unit needs to stay on the control monument throughout the session. Once you have collected enough data, about an hour or 2. Then you can move the 1 or 2 units to other baseline points. Back in the office you download the data off the units to the post processing software. Once in the software the control point published coordinates are entered to correct the baseline points to the correct positions. Your buddy with the?ÿTrimble R8 m3, nice unit, might know someone with a running base station. They could download your data and postprocess for you giving you the corrections in?ÿpositions. That way you could get by with one unit. Just log your time on 1 baseline point at a time. CORS in the USA is not going to help you. Your best bet is to get someone in Belize to help you that has GPS control stations.
Yes!
I see 4 nearby sites:
North of you is CHET CORS in Chetumal, Mexico, GPS & Glonass
Southwest is MTP1 CORS, Tapachulo, Guatamala, GPS
Southwest is GUAT, Villa Nueva, Guatamal, GPS & Glonass
Southeast is TEG2, Tegucigalpa, Hondura, GPS
But L1/L2 GPS will work from CORS 1,000 Km away and more.?ÿ
You would want to be able to post process yourself or have someone do it for you to use other nearby base stations.
Single point observations are not as precise as concurrent observations but will serve your purposes. I suggest more than a single GPS at either end for directional and distance checks. If L1 only units are available use them near your main observation for secondary check points.
Paul in PA
I've never been to Belize, but I'm pretty sure that OPUS will work.?ÿ AUSPOS works in Oklahoma, after all. In fact AUSPOS may be a better choice for you. I've no idea what grid system will be appropriate, or how you would get from the reported coordinates to the system of choice.?ÿ UTM, scaled to ground, would be a fall back.
Perhaps the thing to do is just reverse traverse back down your line.?ÿ ?ÿ
I have a couple locus receivers. I aughta sell....