baseline azimuth between OPUS points: 20.1956810256 baseline back azmuth: 200.195739243 baseline calculated distance: 23.9307614539 meters laser measured distance: 23.9200130937 meters difference between them: 0.0107483601125 meters notice that in this case the laser meausered distance is LESS than the OPUS based distance missing point calculated location from p1: 38.1477352448, -122.268232871 calculated angle from baseline: 59.619733747 resulting azimuth (heading from true north) p1 to p3: 79.8154147726 missing point calculated location from p2: 38.1477353357, -122.268232828 calculated angle from baseline: 55.6601022127 resulting azimuth (heading from true north) p2 to p3: 144.53563703 distance between these two versions of p3: 0.0107483593578 meters resulting azimuth (heading from true north) p1-p3 to p2-p3: 20.1958385149 you should review the OPUS reports and determine if p1 or p2 was a more accurate solution ------------------------------------------------- For testing sake we will caluclate the location of p2 based on where we just calculated p3 (from p1): p3 to p2 point calculated location: -122.268383924 38.1479026977 the OPUS location: -122.268383881 38.1479027889 whats the difference?: 0.0107982377187 meters resulting azimuth (heading from true north) p3 to p2: 324.535578813 compare this to the baseline distance difference from above: 0.0107982377187 vs 0.0107483601125