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Genereer een constante helling van één oppervlak naar een lager oppervlak

MikeBickley

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Bij het ontwerpen van een groevehelling heb ik de footprint van de rand van de groeve over het grondoppervlak (raster) gelegd en een tweede oppervlak (raster) dat de basis van de groeve vertegenwoordigt. Geen van beide oppervlakken is horizontaal, uniform of parallel. Het probleem is hoe ik de footprint van de basis van de groeve kan creëren, ervan uitgaande dat er een constante helling naar beneden is vanaf het grondoppervlak. Het genereren van die basisfootprint stelt me vervolgens in staat om een raster te maken tussen die twee polygonen en de zijkanten van de groeve te contouren.<\/P>

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3D Analyst geïnstalleerd.<\/P>

Alle suggesties worden gewaardeerd!<\/P>

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Mike<\/P><\/BODY><\/HTML>

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Mining

Accepted answers

larryzhang

I see.

Maybe, it is not bad idea to try differently as below.

You can extract all vertices’ values from the base raster, which are intersected with the lower edge of the slope polygon via the gp at http://resources.arcgis.com/en/help/main/10.2/index.html#//00q900000016000000

Once the vertices’ z values obtained from the base surface, you can edit the slope polygon.

Even not horizontal (a sloping and irregular surface), it can be doneeffectively.

Agreed with you, it is challenging, at least, not efficient, especially, for complex and operational mines or constructions, when using 3DAnalyst in ArcGIS to do ‘open pit design’. Maybe, you already have the book (attachment) at your hand…

All comments

larryzhang

In mining industry, many design engineers are using Surpac, which offers effective workflow to do so, including creating pits, dumps and other surface design features and enable the user to analyse and compare the results very easily.

http://www.gemcomsoftware.com/browse/mine-type/open-pit-operations

MikeBickley

Larry - thanks again for your input. I think the idea of extracting the Z values from the intersection of the slope surface and the lower surface will work. Maybe as ESRI develop 3D and mining / geology-specific tools these tasks will become easier...

Mike

larryzhang

I see.

Maybe, it is not bad idea to try differently as below.

Once the vertices’ z values obtained from the base surface, you can edit the slope polygon.

Even not horizontal (a sloping and irregular surface), it can be doneeffectively.

MikeBickley

Larry,

Many thanks for your reply. So far I have seen no solution and am creating this slope in AutoCAD then importing the surface to ArcMAP. The issue is that the lower surface is not horizontal, it is a sloping and irregular surface. Looking at your diagram, imagine that lower intersect surface sloping rather than having constant elevation.

Mike

larryzhang

mike,

your issue is solved aready?

If working with 3D Analyst in ArcGIS for 3D polygon creation (footprint of pit design), please refer to ArcGIS Help (10.2, 10.2.1, and 10.2.2) .

You can edit 2D polygon with attaributes (Z), and then convert into 3D feature class (when needed). When editing the vertices with Z values (at least, 4), please refer to the attachment figure

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