RECORD OF SURVEY 35-005 - Laserfiche WebLink

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� WHEREVER THE 1994 POINTS WERE ACCEPTABLE THOSE POSITIONS WOULD BE HELD IN THE wpm FOLLOWING ADJUSTMENTS OF THE GENERAL NETWORK; HOWEVER, IN THAT MUCH OF THE CITY IN THE PRIMARY NETWORK THE STANDARD DEVIATIONS (68% LEVEL OF CONFIDENCE) OF THE IS CONSIDERED TO BE IN SUBSIDENCE IT WAS DECIDED TO FIX POINT #26 AT THE RECORD HORIZONTAL COORDINATES DERIVED FROM ADJUSTMENT #98-2 AVERAGE 0.3 CENTIMETERS IN 1994 COSCN ELLIPSOID HEIGHT AND PERFORM A FREE VERTICAL ADJUSTMENT. LATITUDE:, 0.2 CENTIMETERS IN LONGITUDE AND 0.5 CENTIMETERS IN HEIGHT WITH A MAXIMUM OF 0.4 CENTIMETERS IN LATITUDE, 0.3 CENTIMETERS IN LONGITUDE AND 0.7 CENTIMETERS IN A MINIMALLY CONSTRAINED ADJUSTMENT #A11 (ALL VECTORS) OF THE GENERAL NETWORK HEIGHT. BASELINE (VECTOR) PRECISIONS AT THE 95% LEVEL OF CONFIDENCE (2 SIGMA) VARY RECORD OFFIXED POINT #26 AT THE ORIGINAL 1994 COSCN POSITION TO VALIDATE THE INTEGRITY OF FROM LESS THAN 0.5 PPM TO 5.1 PPM AND AVERAGE 1.3 PPM FOR 40 MEASURED SURVEY THE MEASUREMENTS. A MINIMALLY CONSTRAINED ADJUSTMENT #Al2 WAS PROCESSED CONNECTIONS VARYING BETWEEN 1237 AND 13,279 METERS AND AVERAGING 5940 METERS IN AFTER SETTING FREE VECTORS WITH UNACCEPTABLY LARGE RESIDUALS IDENTIFIED IN LENGTH. THE RELATIVE DISTANCE ERRORS AT THE 95% LEVEL OF CONFIDENCE IN THIS ADJUSTMENT #A11. SEE THE APPENDIX FOR A FULL LIST OF THE VECTORS. AS A RESULT NETWORK AVERAGE 0.6 CENTIMETERS WITH A MAXIMUM OF 0.9 CENTIMETERS. A FIRST ORDER OF THE CITY OF STOCKTON HORIZONTAL CONTROL SYSTEM PHASE XIV THE RESIDUALS AVERAGE 0.5 CENTIMETERS 2D HORIZONTAL AND 0.0 CENTIMETERS IN (C-1) SURVEY PER THE FGCS REQUIREMENTS WOULD ALLOW 1.6 CENTIMETERS FOR THE WITHIN THE CITY OF STOCKTON AND COUNTY OF SAN JOAQUIN, HEIGHT WITH A STANDARD DEVIATION OF 0.4 CENTIMETERS 2D HORIZONTAL AND 0.9 MINIMUM LENGTH LINE IN THE PN AT THE 95% LEVEL OF CONFIDENCE. STATE OF CALIFORNIA CENTIMETERS IN HEIGHT AND A MAXIMUM OF 3.3 CENTIMETERS IN 2D HORIZONTAL AND 3.5 CENTIMETERS IN HEIGHT. VECTORS AVERAGE 2578 METERS WITH A MAXIMUM LENGTH OF THE RESIDUALS AND CLOSURES BETWEEN KNOWN CONTROL POINTS DISCUSSED IN THE PREPARED BY: 13,279 METERS. (SEE #Al2 FOR A TABLE LISTING OF THE N, E AND UP RESIDUALS) ABOVE ADJUSTMENTS ARE GOOD INDICATIONS OF THE ACCURACIES OBTAINED BY THIS McGEE SURVEYING CONSULTING SURVEY AT UNOBSTRUCTED SITES. THE ACTUAL RESIDUALS LISTED IN THE RESIDUAL SANTA BARBARA, CALIFORNIA SUMMARIES ARE INDICATIVE OF INDIVIDUAL POINT ACCURACIES. LOOP CLOSURES WERE COMPUTED FOR THE PRIMARY NETWORK OF 14 POINTS WHICH EXCEEDED 1: 1,000,000 ON & INCLUDED IN THIS SURVEY ARE 57 POINTS FROM THE 1994 COSCN SURVEY. AFTER REMOVAL THE AVERAGE AND NOT LESS THAN 1:800,000. OF DISTURBED, RESET OR SINGLE OCCUPIED POINTS THE AVERAGE DIFFERENCE FROM THE KJELDSEN SINNOC K & NEUDECK, INC. 1994 COSCN RECORD TO CALCULATED POSITIONS IN METERS ARE LISTED AS FOLLOWS. CONSULTING ENGINEERS & LAND SURVEYORS KTON, CALIFORNIA AVERAGE 0.002 0.005 -0.021 NOTE: STOC FOR DETAILED MONUMENT LOCATIONS, DESCRIPTIONS, AND SWING TIES MARCH 2001 STD DEVIATION 0.008 0.008 0.024 FOR MONUMENTS ESTABLISHED FOR PHASES I-XIII AND SHOWN ON MINIMUM -0.014 -0.016 -0.065 THIS SURVEY, REFER TO THE CITY OF STOCKTON BENCHMARK BOOK MAXIMUM 0.015 0.020 0.027 AND THE FOLLOWING FILED MAPS: PHASE CORD OF SURVEY BOOK ADJUSTMENT #A21 FOLLOWED BY CONSTRAINING THE GENERAL NETWORK TO 44 OF THE 1994 AND PAGE, SAN JOAQUIN COSCN POINTS TO ESTABLISH GEODETIC POSITIONS, ELLIPSOID HEIGHTS AND STATE PLANE COUNTY RECORDS COORDINATES BASED ON THE 1991.35 EPOCH AS SHOWN ON THE ATTACHED COORDINATE 1 28-58 LISTS. THE FOLLOWING TABLE LISTS TIME DIFFERENCES FROM RECORD 1994 COSCN TO THE II 28-119 FINAL READJUSTED POSITIONS FOR DISTURBED OR MOVED 1994 POINTS. 111 28-138 IV 28-180 POINT DN DE DZ (EH) V 29-8 193 -0.006 0.022 0.176 VI 29-34VII 29-61 258 -0.000 0.006 -0.136 VIII 29-168 290 -0.016 0.001 -0.045 IX 30-17 291 - X 32-49-0.035 -0.007 -0.060 XI 32-96 300 -0.011 -0.016 -0.060 XII 33-20 301 -0.015 -0.016 -0.072 1 XIII 33-20 316 0.000 -0.019 0.229 317 -0.015 -0.007 0.243 326 0.021 0.006 -0.019 1002 -0.018 0.010 -0.020 ACCURACY: A SURVEYS CLASSIFICATION IS DEFINED IN THE FEDERAL GEODETIC CONTROL SUBCOMMITTEE (FGCS) SPECIFICATIONS FOR GPS RELATIVE POSITIONING DATED 5/11/1988. TO BE CLASSIFIED AS MEETING A CERTAIN ORDER OF SURVEY, THE CONNECTING LINES BETWEEN STATIONS IN THE SURVEY MUST NOT EXCEED AN EXPECTED ERROR AT THE 95% LEVEL OF CONFIDENCE OF NOT GREATER THAN A COMBINATION OF A BASE ERROR (E) PLUS THE PRECISION RATIO MULTIPLIED TIMES THE LINES LENGTH (D). THE EQUIVALENT LINEAR ONE-STANDARD DEVIATION IS GIVEN AS S = THE SQUARE ROOT OF (E2+D2)/1.96. FOR "FIRST-ORDER" (1:100,000) THE BASE ERROR IS 1 CENTIMETER. THE STANDARD DEVIATIONS (68% LEVEL OF CONFIDENCE) OF THE HORIZONTAL COORDINATES DERIVED FROM MEASUREMENTS IN THE GENERAL ADJUSTMENT RESULTING FROM ADJUSTMENT #A21 AVERAGE 0.3 CENTIMETERS IN LATITUDE, 0.3 CENTIMETERS IN LONGITUDE AND 0.9 CENTIMETERS IN HEIGHT WITH A MAXIMUM OF 1.4 CENTIMETERS IN LATITUDE, 0.8 CENTIMETERS IN LONGITUDE AND 2.9 CENTIMETERS IN HEIGHT. BASELINE (VECTOR) PRECISIONS AT THE 95% LEVEL OF CONFIDENCE (2 SIGMA) VARY FROM LESS THAN 1 PPM TO 460 PPM FOR A SHORT 15 METER LINE AND AVERAGE 5.9 PPM FOR THE 576 VECTORS IN THIS SURVEY AVERAGING 2600 METERS IN LENGTH. THE RELATIVE DISTANCE ERRORS AT THE 95% LEVEL OF CONFIDENCE IN THIS NETWORK AVERAGE 0.7 CENTIMETERS WITH A MAXIMUM OF 2.7 CENTIMETERS FOR MEASURED VECTORS. A FIRST ORDER (C-1) SURVEY PER THE FGCS REQUIREMENTS WOULD ALLOW ONE CENTIMETER+10 PPM OF A LINES LENGTH AT THE 95% LEVEL OF CONFIDENCE. THIS IS EQUIVALENT TO 1.4 CENTIMETERS FOR A 1000 METER LINE. SEE ADJUSTMENTS FOR STATION STANDARD DEVIATIONS, STATION ERROR ELLIPSES AND THE RELATIVE DISTANCE ERROR ESTIMATES FOR VECTORS AT THE 95% LEVEL OF CONFIDENCE. SHEET 3 OF 14 ..r