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JamaL9722060
723 Vistas, 7 Respuestas

AutoCAD 2021: What is best practice to get parcel lines connected where the circles are,

AutoCAD 2021: What is best practice to get parcel lines connected where the circles are,

 

Surveyors used to draw parcel lines with circles at each vertex without having these lines connected.

 

What might be the best practice to get these lines connected IN ONE GO such that they can be converted to GIS decently.

 

Sample data is attached

 

Clip_209.jpg

 

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Jamal Numan
Etiquetas (1)
  • cad
j.palmeL29YX
en respuesta a: JamaL9722060

I think you need some programming (LISP).

A rough idea:

- check for each line, if an endpoint is inside a circle: compare each endpoint with each centerpoint, if the distance is smaller or equal than the radius of the circles (0.75) then

- change the coordinate of this endpoint to the coordinate of the centerpoint.

 

But this is only a first thought. I'd suggest to ask in the customization forum if someone can help (or perhaps you can do it yourselfe).

 

 

 

Jürgen Palme
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pendean
en respuesta a: JamaL9722060

Any reason you are not using AutoCADMAP (or Civil) instead of plain AutoCAD for this task? I see they are in your signature for older 2014 software, any reason you abandoned them?
ChicagoLooper
en respuesta a: JamaL9722060

Circles? Surveyors using circles? Why?

BTW, some consider Survey drawings and GIS drawings are like oil and water, they don't mix.

 

Get rid of the circles, they can't be used if your end goal is shapefile. To begin, use MAPCLEAN command. Next, you'll need to make the parcel lines TOUCH and touching will create intersections. Depending on your specific drawing, your settings may, or may not look like this:

1.png

 

To create polygons which can be exported to shapefile, do this:

  1. Create a new 'PARCEL' layer. Make the Parcel layer current. Optional: Give this layer a high visibility color.
  2. Invoke the BOUNDARY command=>Click the button labeled Pick Points=>Click the interior of each parcel=>ENTER.
  3. The the individual parcels have been generated. Turn off all layers to reveal the new parcel boundaries.

The newly created boundaries are all closed polylines which can be  exported to as a feature class in shapefile format. 

Chicagolooper

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Kent1Cooper
en respuesta a: j.palmeL29YX


@j.palmeL29YX wrote:

... if an endpoint is inside a circle: compare each endpoint with each centerpoint, if the distance is smaller or equal than the radius of the circles (0.75) then

- change the coordinate of this endpoint to the coordinate of the centerpoint.

....

@JamaL9722060 , do they ever end inside the Circles, or do they just touch the Circles?  The principle is the same, but it could be easier to write code if the endpoints always lie on the Circles.  [I did notice some running through Circles, but it looks like they are extras, overlaying others there that do not run through.]

 

However, that process will be different for the Arcs at street corners.  The change would be to the starting or ending angle of the Arc, since that's what's stored for them, not the coordinates of their endpoints.  That is certainly possible, just different from what would be changed for Lines.

 

Which raises the question:  Are the boundary parts that run from Circle to Circle Lines and Arcs, as I have been assuming, or are they Polylines [or maybe something else]?

Kent Cooper, AIA
JamaL9722060
en respuesta a: JamaL9722060

Thank you guys for the help.

 

I’ll try to clean the data with other software like FME and find out if it can resolve all such “dirty” data. This is how the data is received and we are tasked to derive parcels out of them with optimal approach

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Jamal Numan
ChicagoLooper
en respuesta a: JamaL9722060

Is your site in Ranits?

 

A typical format for parcels is shapefile because it is both geospatial and data rich. The parcel data can be loaded into attribute fields and the line work can be referenced to real world locations. Ask the sender if they have the parcel data in shapefile or gdb format.

Chicagolooper

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JamaL9722060
en respuesta a: JamaL9722060

Thank you ChicagoLooper

Best

Jamal

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Jamal Numan