Best way to Post-Process using RINEX
Posted By Cris Perez on 4/7/2009 at 11:48 AM

I am going around in circles on this, how do I post-process data that I have collected with my ProMark3 in WGS84 with RINEX data I downloaded that is NAD83? Does MobileMapper Office automatically do this?

Thanks in advance
Cris


Re: Best way to Post-Process using RINEX
Posted By Phil Stevenson on 4/7/2009 at 12:34 PM

Cris,

Raw data files are raw data files. GNSS Solutions will read them and present coordinates relative to your project settings.

Do you have the application note named

GNSS Solutions - customizing the coordinate list

ftp://ftp.magellangps.com

Look in the folder at

\Land Survey\GNSS Solutions\Application Notes



Re: Best way to Post-Process using RINEX
Posted By Cris Perez on 4/7/2009 at 2:24 PM

I will look into GNSS Solutions. So just to clarify, the raw data files are already recognized as WGS84 and displays them relative to the projection that I choose to display.

Any advice on finding information about use of ProMark3 data with ESRI ArcView. I am currently, collecting data with ProMark3, post-processing it with MobileMapper Office and then exporting shapefile in NAD83 StatePlane V, Feet per predefined coordinate system that i got out of ArcView Projection files and used in MobileMapper. Does this sound correct? Or should i export from MobileMapper as WGS84 Lat/Long and then reproject in ESRI ArcView to NAD83 StatePlane V, feet?

Any help or direction would be much appreciated.

Thanks again,
Cris


WGS84
Posted By Phil Stevenson on 4/8/2009 at 9:25 AM

I have a constant struggle with the use of "WGS84" as a datum for several reasons. WGS84 is an ellipsoid, not a dstum. When it is used to describe a datum it should include which iteration of WGS84 is meant. We have no accurate positions for surveyed points available outside the DoD for the WGS84 datum. That means we have no way to test our results against a national standard.

I know that GNSS Solutions and MobileMapper Office both describe the use of WGS84 as a datum but if you have either application note

GNSS Solutions - customizing the coordinate list

or

MobileMapper Office - customizing the coordinate list

You will see how I create coordinate system definitions that relate to my survey data, NAD83(CORS) or NAD83(2007), and state plane coordinate systems that are a close match for the national standard.

It is not hard to get from MobileMapper Office into the ESRI software. Some experimentation may be required to decide whether the ESRI prj file or the projections built into MobileMapper Office give the best results for a particular application. GNSS Solutions does not have a shape file export so my method is to create an export template that contains the information I want to see in the attribute table and import that to ArcMap using the import X,Y tool.

If none of that makes sense send an email. I will share a paper I wrote on the subject of WGS84 and some examples of my work going from Magellan to ESRI software. There are multiple pathways to success.

I just added a MobileMapper 6 photo mapping project to the recent ProMark500 radial static project. The field work was done using the MobileMapper Today software. The photo maps can be view with a web browser or by using ESRI software. All of this is on my temporary projects ftp site.