Earth's Largest Land Surveyor Community
Welcome to the community. You'll need to be more specific. coordinate station for what?
i was checking two controls point arround the mining area, the results shown some difference with the original coordinates and i want to adjust it.
HI Hank, You need to determine which one is correct . How was the first coor. establish , and why are they different now. One of them could be wrong you do not adjust coor. in this case. First you need to check how they were done in the first place is this by total station or by GPS. how far are they out , Make sure that all the setting were the same. Was this done by you are some one else. Are there any more points that you can tie into to determine which one is more correct with the other controls. Two control can not control this whole survey ,or they the only two left. But coor. are not adjusted in this type of case. one is right the other is wrong. You only adjust coors for your traverse closure error. Was there a closed traverse done on this. But closing coor are adjusted many different ways.
If you have other controls come off them and retie the one's in ? first before you do anything else. and make sure that all the measuring formats settings are the same and have not been changed .
any Cartesian coordinates can be adjusted, but unless you have specifics you can run into issues specific to adjustments outside of the basic geometry aspects of geospatial data. Projections, adjustments etc. etc. *free *survey *software *cogo *download
copy and paste this into a google search === *free *survey *software *cogo *download
you will see there is plenty of free cogo software... I live in Minnesota, USA and I used to use MNCOGO for years... not sure if it still exist, but I'm sure there is something out there...
HI Cut fill, Yes i am aware of MN cogo .Also some very good complex programs for HP calculators. I featured the Mn DOT web site on HP 35s and HP 33s calculator curve programs And talk about how good the programs were and they contain more than curve programs also i have expressed how good their software page is and mention the MN Cogo32 and their other software like MN Level . I do not know if this will help Hank, I am puzzle with his ? because he talks about only two points. I know you read the advice i gave him he has not answered me back. So I have no way of knowing how these coors. were determine ,by TS or GPS. Like , I told him take care look for the reason why they are different first, there's got to be more than two points for him to check in to. You know that there ,are a lot of things, like settings that will affect the out come of this coors. I have seen many times that something as simple as set to US. feet was changed to International feet. or vise versa caused big problems before it was solved. WE do not have all the variables . Like Survenator said, be more specific. That is the point, I was trying to make to Hank, thanks for your input, always.
Billy YES cutfill these programs are still being used.
Hi cutfill , I knew there was a lot lakes up there , I think you would find some dry place to survey at. But told myself ,he probably got tired of looking for dry land. Hey cutfill I am just Billy to you .Thanks for the respect , we all friends here. Talk at you later.
Thank you all for your advice
After a discussion with my chief,
Those two control points were established by GPS using RTK. And I would like to correct it with the geodesic points which are located at 50 km from my working area.
How can I Process?
Thank you billy brooks, survenator and cut fill
Hi Hank , Now I am more confused, the key word here is adjustment. Are you wanting to adjust or you wanting to convert these coors. from local to geodetic. But I am still confused if you retied them with the new system why do you need to convert them. Do you know how to translate points from one system to the next and how to rotate them if needed ,Or you asking how to convert three dimensional Cartesian coors, to latitude and longitude and height. I will give you a link to chapter 5 that deals with this .
this has some links to conversion calculator pages , plus OPUS site they can help you ,plus some free programs you can download to your computer, like " invers3d.exe" ,plus other links
http://www.ngs.noaa.gov/PC_PROD/Inv_Fwd/invers3d.exe this is also on the link Below.
those coor points are not local, what i need to do is to adjust it with the correct one located at 50 km from my site.
after that i will add 4 control point to have in total 6 point which gona help me to calibrate the site.
Hi hank , How are tying Into the points that are 50km from you. Have you went over the info i gave you. I still do not understand what you are trying to do. are you trying to convert your old coors to a different projection the chapter 5 info i gave you goes over RTK and geodesic procedures .so i am lost about what is your ? are these coors on the same geodesic system. Have you look at the software at MN dot some of those will adjusts or translate grid projections.
Hi Hank, Let me ask you this . are these two points that you keep talking about what are they ? are they Monuments or they base stations you are using ? what are they?