5 replies to this topic

[swardrup]

We are trying to determine the amount of area for "plains", "rolling-hills", "mountains", and "other terrain" for our city for a grant application. But need some sort of slope classification system - ie. % slope rolling hills 10%-20% - something of this nature. Is there a slope classification standards for this type of application?

Thanks

Steven

[johnnyh]

Maybe make a call, or stop by office hours, of the local geology professor?... I was thinking about doing something similar for certain slopes/aspects for potential avalanche zones.

[uriel]

We are trying to determine the amount of area for "plains", "rolling-hills", "mountains", and "other terrain" for our city for a grant application. But need some sort of slope classification system - ie. % slope rolling hills 10%-20% - something of this nature. Is there a slope classification standards for this type of application?

Thanks

Steven

Hi

I think there is not an universal standard for classification, for there are different purposes of landuse. ie. building, agriculture, forest and so on.

[Spitteus]

In fact, uriel is right, but it is obvious that most of area amount will go to buildings.

[Thad]

Why don't you just locate the areas you consider rolling hills, plains, mountains measure the slopes in those areas. Then do a rough classification based on dem slope measurements and then generalize these areas. You have to generalize because the base of a mountain may not have a steep slope but it doesn't really make it a rolling hill.

Make sense? Seems subjective to me, so as long as you document how you made your measurements (and that they are realistic) you should be ok.

[Clark Geomatics]

I'm thinking the same as Thad - create a rough estimate based on a slope-degrees calculation (you can use GlobalMapper), categorize the slope quantitatively, then generalize.