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Adding Descriptions to Carlson GPS vectors

Vectors from certain Carlson rw5 files won't have descriptions in a format the Vector import routine can understand.  Here is an example of a GPS observation that was stored as Point 2300 with the description "PIPE":


--GS,PN2300,N 966.2498,E 995.3392,EL99.7017,--PIPE
G0,07/28/2011 11:55:10,(Average) - Base ID read at rover: 0000
--HRMS:0.039, VRMS:0.064, STATUS:FIXED, SATS:12, PDOP:2.366, HDOP:1.101, VDOP:2.094

You can see the vector information in lines G0 to G3.
The meta information about the shot is shown as a comment
The lat/long info is stored as a "GPS" record. These records are used only by Carlson software
The "GS" record which normally stores the point coordinates, description and pointnumber in a TDS rw5 file has been commented out.

Here's what you do.  The --GS record contains a rough field position which Star*Net can use as an initial input, as well as the required description.  Follow this procedure to import both the Vector Data AND descriptions:

1. Import the Carlson vectors into the project.
2. Open the rw5 file in Notepad and use Edit | Find and Replace and tell it to replace:
all instances of: --GS with: SP
3. Save that file with an alternate name
4. Now fire up the Carlson convertor and create a dat file using this modified rw5 file.
5. When you add the dat file to your project you will find that all these SP records have been added to your dat file as commented out C records:

# C 1 1000.00000 1000.00000 100.00000 'TR-MAG
# C 2300 966.24980 995.33920 99.70170 'PIPE

6. Highlight all the C records and hit the # key once to remove the comments. Your stored points are not fixed but because they are close to the final value they will serve as an excellent starting point. And they include descriptions which will be included when you run the adjustment.

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  1. James Johnston

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