Curve Table Data Checking

After a traverse closure is performed on the boundary and all of the individual lots, the curve parameters generated by the traverse calculations are checked against the information shown on the curve table.  Curves are entered in our closure checking by DELTA / RADIUS / CHORD BEARING.

 

Review

·        Are the curves numbered sequentially?  If a curve number, or series of curve numbers is not used, show it as not used.  Don’t just leave it out of the table.  This is not necessary when a curve table is assembled for a single sheet in a multi-sheet set, where only the curves on that particular sheet are shown in the table for that sheet.

·        Are the radius distances for successive curves the same?  If a series of radius distances are shown as 200 feet, a radius of 199.99 feet or 200.01 feet could be an indicator that something is wrong.

·        Does the calculated arc length, tangent and chord length match the values shown in the curve table?  If there is a difference of more than .02’ on any of the distances, further checking is required.

·        If the calculated arc length, tangent and chord length DO NOT match the curve table, do the delta / radius / chord bearing match the curve table?  If not, the closure check may have entered in-correctly.  If they do, is the rounding error within 0.02’?

·        Do the centerlines (which we do not run closures on) reasonably scale to the values calculated?

·        Are all of the curves shown in the curve table actually labeled somewhere on the drawing, or are all of the curve labels on the drawing shown in the curve table?

·        If applicable, add the delta angles of successive curves to compare it to the opposite side.  Do they match?

 

References:  I.C. 50-1303, I.C. 55-1911 and the Minimum Standards for Land Boundary Surveys, Land Descriptions and Maps, by the Idaho Society of Professional Land Surveyors (Adopted March 21, 1992).

Last Revised: 1/14/2005 4:51 PM

Curve Table Data Checking

After a traverse closure is performed on the boundary and all of the individual lots, the curve parameters generated by the traverse calculations are checked against the information shown on the curve table.  Curves are entered in our closure checking by DELTA / RADIUS / CHORD BEARING.

 

Review

·        Are the curves numbered sequentially?  If a curve number, or series of curve numbers is not used, show it as not used.  Don’t just leave it out of the table.  This is not necessary when a curve table is assembled for a single sheet in a multi-sheet set, where only the curves on that particular sheet are shown in the table for that sheet.

·        Are the radius distances for successive curves the same?  If a series of radius distances are shown as 200 feet, a radius of 199.99 feet or 200.01 feet could be an indicator that something is wrong.

·        Does the calculated arc length, tangent and chord length match the values shown in the curve table?  If there is a difference of more than .02’ on any of the distances, further checking is required.

·        If the calculated arc length, tangent and chord length DO NOT match the curve table, do the delta / radius / chord bearing match the curve table?  If not, the closure check may have entered in-correctly.  If they do, is the rounding error within 0.02’?

·        Do the centerlines (which we do not run closures on) reasonably scale to the values calculated?

·        Are all of the curves shown in the curve table actually labeled somewhere on the drawing, or are all of the curve labels on the drawing shown in the curve table?

·        If applicable, add the delta angles of successive curves to compare it to the opposite side.  Do they match?

 

References:  I.C. 50-1303, I.C. 55-1911 and the Minimum Standards for Land Boundary Surveys, Land Descriptions and Maps, by the Idaho Society of Professional Land Surveyors (Adopted March 21, 1992).

Last Revised: 1/14/2005 4:51 PM