Laserfiche WebLink
<br />: <br /> <br />. <br /> <br />SUMMARY: <br /> <br />. <br /> <br />. <br /> <br />-6- <br /> <br />The following is a summary of our findings in the area east <br />of Carbondale in which there was a discrepancy between our <br />mapping and your field check. <br /> <br />We reset the two high flown stereo-models that covered this area <br />and leveled the models using existing vertical ground control. <br />We did not use vertical control points 16 and 17 in this <br />procedure. We then occupied these two positions and found that <br />point 16 fit, whiile point 17 did not. <br /> <br />We then asked C.V.I. to go back into the field and re-survey <br />not only points 16 and 17, but to also survey four additional <br />vertical points along the railroad tracks in the problem area. <br /> <br />C.V.I. came back with the new surveyed points and found <br />that they had a bad elevation at point 17. The old value was <br />6177.05'. The new value was 6179.21', a difference of 2.2'. <br /> <br />To correct the final map, we reset the stereo models covering <br />that area and recompliled the contours. We checked the newly <br />plotted contours against your field check and it seemed to fit. <br />