Provide a tool to identify parameters of an existing curve
Our organization receives plans in with radial bearings defining the direction of the curve. Once entered, the parcel fabric in ArcGIS Pro stores this information in chord bearing. We have no issue with the fact that this is stored in chord bearing, but once stored, there doesn't appear to be an easy way to identify the radial bearing of a curve anymore. We would like a tool (perhaps something on the Parcel Utilities Add-In?) that, when we click on a curve, provides all the curve parameters. Or, similar to the Traverse window, where you can specify curve parameters, can this be an enhancement to the Attribute Window for once the curve has been entered?
Our use case for this is: we had a parcel with a high misclosure and we couldn't figure out why. It turned out to be due to a bad curve bearing, but this was very hard to identify, since the plan displayed radial bearings and the lines in the fabric displayed chord bearings. In ArcMap, we would have opened the parcel, which would have showed us the radial bearing since those would have been the properties stored on the plan. Then we could easily compare what was entered to the plan. We would find it helpful to have something that allowed us to do this in ArcGIS Pro.
that radial line in shown in desktop
needs to be this according to plan
but you only get the chord in ArcGIS pro so I have no way to enter a new radial
@SeanLyons- a pop-up is a good option for this. You can configure the popup for the line layer to calculate the Radial direction (and other curve parameters) from the existing circular arc COGO attributes, and then present those in the pop-up list. Like this:
Radial Direction Arcade Expression:
function DMS_North(azimuth){
return ConvertDirection(azimuth, {directionType:'North', angleType: 'Degrees'}, {directionType:'North', angleType: 'DMS', outputType: 'text', format: 'd[°]mm[\']ss["]'})
}
var radius = $feature.Radius
var arcLength = $feature.Arclength
var chordDirection = $feature.Direction
if( IsEmpty(radius) || IsEmpty(arcLength))
return
var delta = arcLength / radius;
var chordDistance = 2.0 * abs(radius) * Sin(abs(delta) / 2.0)
if ( IsEmpty(chordDirection) )
return
var isCCW = radius < 0.0
var isMajor = delta > PI * 2.0
var tangentDirection = chordDirection - (delta/2.0*180.0/PI)
var radialDirection
iif(isCCW, radialDirection = tangentDirection - 90.0, radialDirection = tangentDirection + 90.0)
return DMS_North(radialDirection)
Tangent Direction Arcade Expression:
function DMS_North(azimuth){
return ConvertDirection(azimuth, {directionType:'North', angleType: 'Degrees'}, {directionType:'North', angleType: 'DMS', outputType: 'text', format: 'd[°]mm[\']ss["]'})
}
var radius = $feature.Radius
var arcLength = $feature.Arclength
var chordDirection = $feature.Direction
if( IsEmpty(radius) || IsEmpty(arcLength))
return
var delta = arcLength / radius;
var chordDistance = 2.0 * abs(radius) * Sin(abs(delta) / 2.0)
if ( IsEmpty(chordDirection) )
return
var isCCW = radius < 0.0
var isMajor = delta > PI * 2.0
var tangentDirection = chordDirection - (delta/2.0*180.0/PI)
return DMS_North(tangentDirection)
Chord Distance Arcade Expression:
var radius = $feature.Radius
var arcLength = $feature.Arclength
var chordDirection = $feature.Direction
if( IsEmpty(radius) || IsEmpty(arcLength))
return
var delta = arcLength / radius;
var chordDistance = 2.0 * abs(radius) * Sin(abs(delta) / 2.0)
return Round(chordDistance,3)
Central Angle Arcade Expression:
function RadiansToDMS(input_radians){
return ConvertDirection(input_radians, {directionType:'North', angleType: 'Radians'}, {directionType:'North', angleType: 'DMS', outputType: 'text', format: 'd[°]mm[\']ss["]'})
}
var radius = $feature.Radius
var arcLength = $feature.Arclength
var chordDirection = $feature.Direction
if( IsEmpty(radius) || IsEmpty(arcLength))
return
var delta = arcLength / abs(radius)
return RadiansToDMS(delta)
@SeanLyons @TaylorMcInnes08 @SarahSibbett
The other thing to consider as a workaround is to use the Traverse's "Trace Lines" tool. Set the traverse tool's Direction parameter to Radial, if you haven't already, and then save the project to make sure this setting is persisted with the map.
Trace over the circular arc line, and change the Radial direction to the corrected value. The geometry of the line will change.
If the preference is to prevent the geometry change, then you can use the "Set Closing" button and click the other end of the circular arc. If needed, use the "Force Close" on the traverse tool settings under the burger button. This would be needed if the change in bearing results in the new end if the circular arc moving beyond the specified closure tolerance (the default closure tolerance is 0.3meters).
