assumed elevations

[ldavis.23383]

Living on the coast a lot of our projects have natural at 4' or less. The local official in one city doesn't like to deal with negative elevations on pipe networks. My question is what the easiest way would be to add 100' to the elevation of the project.

Thanks Jake

[brian.hailey933139]

Tell the local official to move to Colorado?

Seriously though, how far along the project are you? Also, is this stated anywhere in the regulations of the city? If not, and you are quite a bit into the design, tell the official that you can change it but you will be sending them a bill for it. If it is, then I guess you'll just have to do it.

[ldavis.23383]

Thanks for the reply

This is a standard policy and we are just starting the design. This will be my first stab at c3d, have been using autocad for 19 years. Wanted to start off on the right foot.

We have some to the survey data already and all elevations are actual, just need to adjust them 100' for the project.

[chris805_1996]

When we work in the southern/central part of California (away from the coast in the desert) we add 500 to the points before we bring them in and design off that. A note is added to the plans telling everyone to subtract 500 to get the real world elevations.

[ldavis.23383]

Yes Christopher that is what i want to do. Can I do that by adjusting a setting or do I have to adjust each pt individually, also will that affect surfaces as i create them.

Sorry if this seems a little simple

thanks Jake

[brian.hailey933139]

Jake, you can do it either way. If you bring the points in, you can select them and then choose Datum on the COGO point ribbon tab before you do anything with them. The issue with this is, if you bring more points in, you'll have to make sure you do this again, but to JUST the new points you've brought in.

If you do it to the points before bringing them in, it may be a little bit easier. Anything created from these points, will be 500' (or whatever) higher and you should be good to go.

[chris805_1996]

We usually adjust them in Excel before we bring them in. That way if we get more points we don't have to worry about which points have been modified and which ones haven't been.