-
Trimble JXL file
Hi, I have found something I don’t understand in these files.
A point record has a face 1 and face 2 record, then a MTA (mean turned angle) record.The horizontal circle in the MTA record does not appear to be the average of the two (after converting face 2 to face 1) as you might expect.
I’m sure there is a simple explanation?
<PointRecord ID="00000454" TimeStamp="2015-11-18T16:11:15">
<Name>R15</Name>
<Code>RETRO</Code>
<Method>DirectReading</Method>
<SurveyMethod>Fix</SurveyMethod>
<Classification>Normal</Classification>
<Deleted>false</Deleted>
<Circle>
<HorizontalCircle>36.2379699</HorizontalCircle>
<VerticalCircle>86.026194</VerticalCircle>
<EDMDistance>44.72911</EDMDistance>
<Face>Face1</Face>
<HorizontalCircleStandardError>0.00027777777778</HorizontalCircleStandardError>
<VerticalCircleStandardError>0.00027777777778</VerticalCircleStandardError>
<EDMDistanceStandardError>0.00208945822</EDMDistanceStandardError>
<EDMMeasurementMode>Fine</EDMMeasurementMode>
</Circle>
<StationID>000003d7</StationID>
<BackBearingID>000003d8</BackBearingID>
<TargetID>000003e4</TargetID>
<Pressure>986.5</Pressure>
<Temperature>20</Temperature>
<ComputedGrid>
<North>15856.297373964</North>
<East>93305.628052364</East>
<Elevation>110.61595261071</Elevation>
</ComputedGrid>
</PointRecord>
<PointRecord ID="00000458" TimeStamp="2015-11-18T16:11:23">
<Name>R15</Name>
<Code>RETRO</Code>
<Method>DirectReading</Method>
<SurveyMethod>Fix</SurveyMethod>
<Classification>Normal</Classification>
<Deleted>false</Deleted>
<Circle>
<HorizontalCircle>216.2377053</HorizontalCircle>
<VerticalCircle>273.9737808</VerticalCircle>
<EDMDistance>44.72942</EDMDistance>
<Face>Face2</Face>
<HorizontalCircleStandardError>0.00027777777778</HorizontalCircleStandardError>
<VerticalCircleStandardError>0.00027777777778</VerticalCircleStandardError>
<EDMDistanceStandardError>0.00208945884</EDMDistanceStandardError>
<EDMMeasurementMode>Fine</EDMMeasurementMode>
</Circle>
<StationID>000003d7</StationID>
<BackBearingID>000003d8</BackBearingID>
<TargetID>000003e4</TargetID>
<Pressure>986.5</Pressure>
<Temperature>20</Temperature>
<ComputedGrid>
<North>15856.297473007</North>
<East>93305.628442692</East>
<Elevation>110.61595446999</Elevation>
</ComputedGrid>
</PointRecord>
<PointRecord ID="0000045c" TimeStamp="2015-11-18T16:11:23">
<Name>R15</Name>
<Code>RETRO</Code>
<Method>MeanTurnedAngle</Method>
<SurveyMethod>Fix</SurveyMethod>
<Classification>MTA</Classification>
<Deleted>false</Deleted>
<MTA>
<HorizontalCircle>334.36614204846</HorizontalCircle>
<VerticalCircle>86.0262066</VerticalCircle>
<EDMDistance>44.729265</EDMDistance>
<HorizontalCircleStandardError/>
<VerticalCircleStandardError/>
<EDMDistanceStandardError/>
<NumberOfHorizontalAngles>2</NumberOfHorizontalAngles>
<NumberOfVerticalAngles>2</NumberOfVerticalAngles>
<NumberOfDistances>2</NumberOfDistances>
</MTA>
<StationID>000003d7</StationID>
<BackBearingID>000003d8</BackBearingID>
<TargetID>000003e4</TargetID>
<Pressure>986.5</Pressure>
<Temperature>20</Temperature>
<ComputedGrid>
<North>15856.297423487</North>
<East>93305.62824753</East>
<Elevation>110.61595354038</Elevation>
</ComputedGrid>
</PointRecord> -
3 Replies
-
I have no experience with these, but I wonder is the MTA (horiz circle) an azimuth?
-
That must be it. Somewhere there must be the orientation info.
-
What you have is just the foresight angles. You need the backsight angles too. The 334.366 degrees could be the angle right which the result of foresight circle reading minus backsight circle reading.
For example, it could look like this:
(in round numbers for simplicity)
This part is not provided:
BS Face 1 61å¡
BS Face 2 243å¡
BS Mean 62å¡This part is provided:
FS Face 1 35å¡
FS Face 2 217å¡
FS Mean 36å¡Reduce the Angles:
36 + 360 = 396396 – 62 = 334å¡
Log in to reply.