How to get my projections and transformations to work together to produce the results I am needing in Collector and AGO

Question

ArcMap is shifting my GPS points that I collect in the Collector App to the South East about 2-6 feet.

I am comparing my shots with Survey points from my survey department.

I have tried numerous GCS and projections....i am seriously running out of steam here.... I do not know what else to GOOGLE to give me the answers i need. No one seems to have the answers. I had my trimble Rep here trying to help me, i have a Case open with ESRI, no one seems to know whats going on...

to say i am frustrated is understatement.

Anyone else run into this issue in the past?

We use a local SITE coordinate system... and not many people use these... if this is something that rings a bell to you, can you please help me out? Lance Cole‌ i was thinking from reading your stuff that you may be someone who has used a Site coordinate system before...

LanceCole · Answer

Miaogeng Zhang‌,

Excellent video...

LanceCole · Answer

Thanks Lisa for the additional information. Just for clarification, I have a few more questions:

* You even have not been able to get your GPS to work with just the State VRS system to the accuracy needed, excluding a site system? 
* You do have an account for the State VRS, correct. 
* Which Trimble GPS model do you have? 
* I assume you are using Collector Classic not the beta of Collector for ArcGIS (Aurora) on an Android device since you are using the SPace App for your RTK?
* What coordinate system do you ultimately want your data to be in?
* What coordinate system is your feature service published to AGOL?
* What coordinate system is your surveyors control data?
* Are you using ESRI basemaps or your own in Collector? If your own, what coordinate system is the basemap? 
* Do you need Z (elevation) data or you only working with 2D XY data?

Once you reply to these questions, I am willing to work with you to take a big step backwards and see if we can get this working for you using small steps forward.  I am a little at a handicap as I only have access to iDevices and we are using Leica equipment. So I may have a few dumb questions.

MiaogengZhang · Answer

The datum transformation can happen at multiple places: from GPS point to webmap (defined by location profile), from webmap to feature layer, from feature layer to your own geodatabase. While you tried with location profile, pay attention to other places: basemap choice, coordinate system and datum transformation setting at data frame at ArcMap. Here is a video discussed about some consideration

Collector for ArcGIS: Working with High Accuracy Data - YouTube