SDR File Conversion

This section describes how the SDR file data is converted to GeoSurvey data fields.

SDR Record	GS Field
00 - Date time	Session Date
01 - Instrument	Session Instrument
01 - Serial No	Session Instrument
02 - PointId,E,N,H,descr	Station Point
03 - Target Height	Height of Target
07 - ObsStn, Azimuth	Obs Stn and Horiz Brg
08 - PointId,E,N,H,descr	Station Point
09 - Src,Tgt,SlopeDist,VA,HA,Descr	Observation
10 - name	Session Name
11 - Src,Tgt,Azimuth,Hdist,Vdist,Descr	Observation
13 - Note	Obs Remark or attribute

If an Observation is F2, the text "F2" is added to the remark.
All other Observations are F1.

Attributes

13AT... - Point attrbute, added to previous Observation/Field Pt
13TS... - Point date/time stamp, added to previous Observation/Field Pt
13... - Point remark, added to remark field of previous Observation/Field Pt

08PD        1001    351211.2957453356380727.8787678893.2762485154016GAGM            
13TSTime Date 06/07/2022 Time 10:56:40                          
08PD        1002    351190.8925207316380731.3628807292.9029858133573CMUC            
13ATQuality                                                     
13ATMethod                                                      
13ATJustify                                                     
13ATDepth                                                       
13ATDiameter                                                    
13ATMaterial                                                    
13ATConfiguration                                               
13ATComment                                                     
13ATDate                2022-06-07                              
13ATTime                10:57:33                                
13ATPhoto

When an Observation or Field Point is read, any 13 records folowing are attached to the
Observation/Field Point as Attributes or appended to the Remark.
Blank attributes (no value) are discarded.

SDR33 File Format (.SDR)

This section describes the SDR file records.
Each record starts with a 2 digit number which defines the layout of the fixed data fields in the record.
In each record chars 3-4 are the derivation code:
F1 - Face 1 observation
F2 - Face 2 observation
NM - Not Measured

00 - Header

Cols	Data	Meaning
0-1	Integer	Record Type
3-4	Alpha	Derivation Code (ED,NM)
5-20	Alpha	Version Number
21-24	Integer	Serial Number
25-40	Alpha	Date and Time
41	Alpha	Angle Unit. 1=Degrees,2=Gons,3=Mils
42	Alpha	Distance Unit. 1=Meters,2=Feet
43	Alpha	Pressure Unit. 1=mmHg, 2=InchHg, 3=Millibars
44	Alpha	Temperature Unit. 1=C, 2=F
45	Alpha	Coord Prompt Option. 1=N-E-H, 2=E-N-H
46	Alpha	Angles Left/Right Option

02 - STN

Cols	Data	Meaning
0-1	Integer	Record Type 02
3-4	Alpha	Derivation Code (NM...)
5-20	Alpha	Point Id
21-36	Real	Northing
37-52	Real	Easting
53-68	Real	Height
69-84	Real	Theodolite Height
85-100	Alpha	Station Description

03 - TARGET

Cols	Data	Meaning
0-1	Integer	Record Type 03
3-4	Alpha	Derivation Code (NM)
5-20	Real	Target Height

04 - COLLIMATION

Cols	Data	Meaning
0-1	Integer	Record Type 04
3-4	Alpha	Derivation Code (NM...)
5-20	Real	Vertical Collimation
21-36	Real	Horizontal Collimation

05 - ATMOSPHERE

Cols	Data	Meaning
0-1	Integer	Record Type 05
3-4	Alpha	Derivation Code (NM...)
5-20	Real	Pressure
21-36	Real	Temperature

06 - SCALE

Cols	Data	Meaning
0-1	Integer	Record Type 06
3-4	Alpha	Derivation Code (NM)

07 - BACK BEARING

Cols	Data	Meaning
0-1	Integer	Record Type 07
3-4	Alpha	Derivation Code (NM...)
5-20	Alpha	Source Point Id
21-36	Alpha	Target Point Id
37-52	Real	Azimuth
53-68	Real	Horizontal Obs

08 - POS COORDINATES

Cols	Data	Meaning
0-1	Integer	Record Type 08
3-4	Alpha	Derivation Code (NM...)
5-20	Alpha	Point Id
21-36	Real	Northing
37-52	Real	Easting
53-68	Real	Height
69-84	Alpha	Description

09 - OBSERVATION

Cols	Data	Meaning
0-1	Integer	Record Type 09
3-4	Alpha	Derivation Code (NM, F1, F2...)
5-20	Alpha	Source Point Id
21-36	Alpha	Target Point Id
37-52	Real	Slope Distance
53-68	Real	Vertical Observation Angle
69-84	Real	Horizontal Observation Ange
85-100	Alpha	Description

10 - JOB

Cols	Data	Meaning
0-1	Integer	Record Type 10
3-4	Alpha	Derivation Code (NM...)
5-20	Alpha	Job Identifier
21	Alpha	Point Id Type
22	Alpha	Include Elevation
23	Alpha	Atmos Correction
24	Alpha	C & R Correction
25	Alpha	Refraction Constant
26	Alpha	Sea Level Correction

11 - REDUCED OBSERVATION

Cols	Data	Meaning
0-1	Integer	Record Type 11
3-4	Alpha	Derivation Code (NM...)
5-20	Alpha	Source Point Id
21-36	Alpha	Target Point Id
37-52	Real	Azimuth
53-68	Real	Horizontral Distance
69-84	Real	Vertical Distance
85-100	Alpha	Description

13 - NOTE

Cols	Data	Meaning
0-1	Integer	Record Type 09
3-4	Alpha	Derivation Code (NM...)
5-64	Alpha	Note