Creating surface from csv point

[Anonymous]

Hi,

I've plotted the points using "create from points". Only issue I'm having is when I go to ID the points. IT does give x, y ,but z(elevation) remained zero. I'm not to sure why its not plotting the points in the z(elevation) axis? when the csv file loads into the "create surface dialog". The preview does show an elevation point, but when its finished plotting. the elevation point all goes to 0.

[Pointdump]

Minh,
Going to need more information. Can you post your CSV file? Are you using Civil 3D or Map 3D?
Dave

[Anonymous]

Hi Dave,

Yes I can attach out csv file. As well the screen shot. Not to sure why the elevation are set to zero when the csv file has an elevation point.

[Anonymous]

I'm using Map 3D

[braudpat · Accepted solution]

Hello

OK you have "only" ACAD MAP and NOT ACAD CIVIL !

1) So I have modified a little bit your CSV to get a right Script file tu draw many 3D Points into ACAD ...

2) Then I run a TRIANGULATE VLX Routine from Mr Elpanov to get 3DFaces ...

3) Please see the .RAR file ... SCR + DWG + Triangulate.vlx ...

THE HEALTH, Regards, Patrice

[Anonymous]

Thanks so much for this! Greatly appreciated. 

[Pointdump]

Minh,
Yes, I notice this too. But you most assuredly have an Elevated Surface. Probably it shows Z=0 because the cursor is tracking the AutoCAD Screen and not the Surface. I don't know how to force the cursor to track the Surface.

Dave

[Anonymous]

Hi Dave,

Yeah, I'd tried adding contours lines on it as well. It worked fine but when selecting output into a dwg file and trying to xref it into another 3d model. the surface comes in at 0 elevation. 

[braudpat]

Hello

If you have 2D Contour PLines (at level Z = Zero), I imagine that you have an OD (Object Data) with the Z / Altitude !?

So with the joined Lisp Routine "OD2DXF38" , you will elevate all your 2D PLines at the right Z / Altitude !

THANKS to CADaSchtroumpf / Bruno / Bonuscad

THE HEALTH, Regards, Patrice

[ChicagoLooper · Accepted solution]

Coleville, SK. Correct?

Things to know:

• Your csv is works fine in Map3D. No further edits are needed to use this csv in Map3D.
• Your csv file is in 'PNEZ format' (Point, Northing, Easting, Elevation) and has four columns. If you had a fifth column it would most likely be 'D' which stands for description, i.e. PNEZD.
• The northings and eastings appear to be referenced against UTM84-12N, meters.
• Technically, the image of the green rectangle that you have uploaded is not a tinn surface, it's a raster. It's an organize array of pixels, not vectors like points or lines.
• The coordinates you have highlighted on your uploaded image are the coordinates of that raster. The raster itself sits at elevation 0. You are not clicking on an individual point.

If you want to use MAPCREATESURFACE command, aka Create from Points button found on the Create Tab, you can do this:

1. Start from a clean, brand new metric template. On command line type MAPCSASSIGN=>In search box enter 32612=>Select the coordinate system named UTN84-12N=>Click Assign Button.
2. Go to Create Tab=>3D Surface Panel=>Create from Surface button=>click Plus '+' sign=>File=>browse to and select your csv. See image-1.
3. Make your selections as shown=>Click OK. See image-2.
4. Zoom extents. Your raster will appear in modelspace. The default color is green.
5. Turn on Bing Hybird use it as a basemap and  compare it with your raster.

Image-1

Image-2

<<If you are running Civil3D in addition to Map3D then you can create a TINN surface using your csv points. Civil3D uses tinn surfaces and alignments to create profiles and cross sections. A tinn will also allow you to perform calculations such as cut-and -fill volumes and slope analysis.>>

[Anonymous]

This totally make sense why it wasn't working in the first place. Thanks for your help.

[pbryan8JTH2]

Hello, I have a question about this lisp routine, could someone let me know how this part works? I am just starting to learn. I see that the -4 and 70 are dxf group codes and I have looked them up in a table, but if someone could just give me the gist of what this block of code accomplishes, I would appreciate it because I cannot figure out what 70 . 112 does especially. Thanks

;;;;;;;;;; Filter for "Good" Polylines ;;;;;;;;;;

'(-4 . "<NOT")

'(-4 . "&")

'(70 . 112)

'(-4 . "NOT>")

;;;;;;;;;; Filter for "Good" Polylines ;;;;;;;;;;

[CADaSchtroumpf]

With DXF help:

---

70

Polyline flag (bit-coded; default = 0):

1 = This is a closed polyline (or a polygon mesh closed in the M direction)

2 = Curve-fit vertices have been added

4 = Spline-fit vertices have been added

8 = This is a 3D polyline

16 = This is a 3D polygon mesh

32 = The polygon mesh is closed in the N direction

64 = The polyline is a polyface mesh

128 = The linetype pattern is generated continuously around the vertices of this polyline

---

112 = 64+32+16 => for heavy polylines (light polylines are not affected by this bit) this discards (-4 . "<NOT") polylines that are polyface or polygon meshes