T-LS

John Noonan

Member
So I set it up linked T-2 with radio and connected to T-LS.
Collected various points. Then did a skate out to some of them.
Down loaded file came as Lat and Long file.
Not helpful. How do I get it to down load as a coor. file?
John
 

Shawn Billings

Shawn Billings
5PLS
JSB__Export_File_Format_20150507-22.25.52.png


You will need to check to see what coordinate system appears in Coordinate System.

JSB__Add_Field_20150507-22.26.07.png


You'll also need to make sure that you have N and E set and Not Lat and Long when you add fields (using the "+" key in Export File Format Screen shown above).

You will notice, by the way, that in the Export File Format Screen shown above that the fields are named N, E and H rather than N Surveyed, E Surveyed and H Surveyed. This is because in
What to Export (accessed by selected the Export Range Button shown above), I have Design, Surveyed and Surveyed Design points checked. Also I have Export Surveyed Desing Points as Separate Points checked in the Export CSV Settings checked. This means that the surveyed point value attached to the design point will be exported with the addition of "STK_" in this case. You can also change that to Add to Design Point Names Numeric Value. If this were checked the Surveyed Point for Design Point 100 would export as point number 100 + Numeric Value (ie 1000, which would result in 1100 for the surveyed point number).

JSB__What_to_Export_20150507-22.25.22.png



JSB__Export_CSV_Settings_20150507-22.25.48.png


This may seem a bit confusing, but once you have it set the way you want it, it will remain set. It gives a lot of flexibility to exporting EXACTLY what you want (including exporting vector data and all sorts of other data).
 

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Shawn Billings

Shawn Billings
5PLS
Go to Home Screen 2 and Select "Data Exchange"
JSB__Main_Second_20150508-17.16.01.png

Select Export
JSB__Data_Exchange_20150508-17.16.28.png

Select Where you want to Export the file to and then click on the Format to select Text/CSV. Then select the name of the file next to "Create File in This Folder"
JSB__Save_File_20150508-17.16.41.png

Key in Name of File to Export or Hit OK if the name is already what you want
JSB___20150508-17.16.48.png

This then takes you to the Export File Format Screen shown above.
JSB__Export_File_Format_20150508-17.16.54.png
 

John Noonan

Member
So it appears that my problem is I used NAD83 / NAVD88 as is my system and there is no option do download in the local state system coor. only Lat and Long
 

Shawn Billings

Shawn Billings
5PLS
You need to create a state plane coordinate system. NAD83 isn't a projection so it will be lat, long.

Your points can be expressed in any coordinate system so the fact that they were collected in lat, long isn't a problem.
 

Shawn Billings

Shawn Billings
5PLS
Once you create a state plane coordinate system, make that the project coordinate system or just set it as the export coordinate system and your points will show in state plane. No conversion required.
 

John Noonan

Member
When setting up the base what is generally a good location / distance to place it in relation to the points to be collected?
 

Shawn Billings

Shawn Billings
5PLS
When setting up the base what is generally a good location / distance to place it in relation to the points to be collected?

I would probably list the things I look for in a base setup as follows (in order of importance):
1. Secure Location. Not likely to be stolen while unattended. Not likely to be run over by heavy equipment.
2. Open, free from obstructions. An observation with the rover near a tree or building will affect that one rover observation. An observation with the base near a tree or building will affect every rover observation using that base. Clean base sites are very important.
3. Radio range. If you don't have communications from the base to the rover, you can't do RTK. Depending on what modem you are using, the communication range will vary substantially. I believe 1 watt will generally give you about a mile range. In my observation, radio range/wattage follows an inverse square rule, meaning that a 4 watt modem will give you about twice the range of a 1 watt (square root of 4=2), while a 35 watt radio will give you about 6 times the range of a 1 watt (square root of 35 is roughly 6).
4. RTK range. I've been working with an internet configuration and have been able to get fixes at 20km (12 miles) between a Triumph-2 and Triumph-LS, but at this range, performance suffers: fixes aren't as fast, accuracy not quite as good. For working in challenging environments, keeping the base close to the rover minimizes variables in the atmosphere (ionospheric and tropospheric delays, scintillation, etc.) that the engines must try to resolve. From anecdotal experience, I think the sweet spot is in keeping those vectors under 5km (3 miles).

When creating the export file how do you get it to not put the word "point" preceding each point number?
I'm guessing that you used the default point names when you stored your points. Default names begin with "Point1" and advance from there. You can set the name, as you are collecting data, to whatever you want. If you don't have a lot of points, you can rename them, one at a time, in J-Field. If you have a lot of points, I'd probably recommend exporting what you have and using a spreadsheet to modify the names on your PC.
 
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