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Creating Contour Map To Highlight River Systems

Hi all, 

 

I am looking to constrain my contour map attached within this discussion post to only the river system within the map for the parameter controlling color. I understand that adjusting the alpha may constrain the area, but it does not accurately reflect the river system. An example of what I want to accomplish is attached within this email. 

 

Do I have to create a custom map as per (https://www.jmp.com/support/help/ipad/Create_a_Custom_Map.shtml) or is there another way that I can outline the river systems I am interested in? For instance can I add more points along the river to help for the alpha? 

Let me know if you need anymore details. 

 

Thanks! 

GraphicsRe: Creating Contour Map To Highlight River Systems

You should probably make your own clip shape. Probably with some hard coded lat/lon values in a path. 

tell a segment in a graph to clip to a regiontell a segment in a graph to clip to a region

dt=open("$sample_data/cities.jmp");
dt<<GRAPH builder=""></GRAPH>

The clip shape can be applied to any segment. Use right-click->Customize to figure out which segments you want. Above I made a triangle clip around three cities in NC. The path string is easier to read than the matrix.

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