That plugin for adding elevation data....?

utiler

I'm just wondering if this is the bets way to create a terrain from survey data provided other than electronic. As per my attachments earlier, I have been given RL's [height date] for a carparking area that I want to model; the data is accurate to all corners so I can easily set out as a profile. Would be good if you guys can give me your comments.

seasdes

@utiler said:

I'm just wondering if this is the bets way to create a terrain from survey data provided other than electronic. As per my attachments earlier, I have been given RL's [height date] for a carparking area that I want to model; the data is accurate to all corners so I can easily set out as a profile. Would be good if you guys can give me your comments.

My view of the world - it depends on the size of the carpark, whether you have an undeveloped carpark (ie no kerbs and islands. Also the spacing of the survey spot heights and the level of accuracy that you want to model.

I would have thought that the process that I had described in my previous post would have been the best available to model the pavement. Kerbs and islands etc could then be superimposed using standard SU entities.

Sometimes surveyors include a 3d mesh covering their spot heights. It might be worth checking with them as they may already have this. It would simplify things.

utiler

Thanks Walter, the data came to from the builder as lines of paper so no 3D survey data was available. That's why I wanted to build from scratch....

seasdes

What methodology did you end up using.
Regards

utiler

This is what I've done: feedback/advice is welcome.

import image with survey data; scale to size
use Jim's 'construction line' tool to draw [with end points] a construction line the height above the image the given height distance.
run TIG's 'triangulate points' plugin...
run Fredo's toposhaper' plugin to create terrain....

triangulate.points.png

AcesHigh

another option that could be used, if all your points are in the perimeter, would be to just connect them all in a perimeter with lines, then select all the lines and run the Soap Bubble plugin...

pilou

@unknownuser said:

and run the Soap Bubble plugin

or Ferrari one

utiler

Thanks fellas, as you can see below in this case they were random points on a site so not bounded my a perimeter line.
Quite often I get spot levels given to me on a hardcopy of a plan so I want a simple way to turn elevation data into a reasonable terrain mesh.

glro

@utiler said:

Thanks fellas, as you can see below in this case they were random points on a site so not bounded my a perimeter line.
Quite often I get spot levels given to me on a hardcopy of a plan so I want a simple way to turn elevation data into a reasonable terrain mesh.

so maybe you shouldn't focus on the perimeter; instead, build a set of 3d points (boundaries AND inside points)

run TIG-points cloud triangulation
http://sketchucation.com/forums/viewtopic.php?t=34232

i am not sure about the result with as few points as in your example

utiler

Thanks glro, that's what I've done.