topic Re: ArcMap 10 Limit Points Create TIN in 3D Questions

ArcMap 10 Limit Points Create TIN

WilliamPlatt — Mon, 14 Feb 2011 14:56:29 GMT

Hello All, I'm trying to create a TIN from a mulipoint feature class. I remember in 9.3 you could limit the points by distance between them. I cannot find that option anywhere using 10. Can someone tell me how to do this?

Thanks

Re: ArcMap 10 Limit Points Create TIN

KhalidDuri1 — Mon, 14 Feb 2011 20:35:04 GMT

Hello William,

This can be done with the Delineate TIN Data Area tool in the ArcToolbox > 3D Analyst Tools > TIN Management toolset.

Regards,
Khalid

Re: ArcMap 10 Limit Points Create TIN

WilliamPlatt — Thu, 17 Feb 2011 12:43:41 GMT

The "Delineate TIN Data Area" removes triangles that are larger than "Maximum Length Edge". What I want to do is lower the "resolution" of the TIN. For example, I have point data with a distance between them of 6 inches. My system can't handle all of those points. So I want to create a TIN that has a 12 inch "resolution", only using half of the points. If I remember correctly in 9.3 there was a setting that you could change this when creating a TIN through ArcMap. I cannot find anything like this in 10.0.

Thanks

Re: ArcMap 10 Limit Points Create TIN

WilliamPlatt — Thu, 17 Feb 2011 13:34:09 GMT

I have found the "Decimate TIN" tool. This takes an input TIN and lowers the "resolution" by the Z Tolerance or by Count. This would help if I had a TIN created already that had all of my points in it. However, my problem is that I have too more data points than a single TIN can hold. I haven't found a tool yet that lets me combine two TINS. Anyone know of such a tool? In the mean time I will keep searching.

Thanks

Will

Re: ArcMap 10 Limit Points Create TIN

WilliamPlatt — Wed, 23 Mar 2011 14:26:23 GMT

The only thing I have found is to create a terrain and then export a TIN from that. It is a pain not to have the option when creating a TIN, but it worked for me.