Grid ranges to polgons

[dinol]

Hi,
I would like to be able to extract a surrounding polygon of a range of grid values. Hope what I descirbe makes sense. I am using GM 11.01.
eg a water bottom depth grid: I would like to create a set of polygons for 3 depth ranges.
1) 0-1000m
2)1000-2500m
3)2500m to max depth of the grid
Is there an easy way to do this?
Contouring in GM can create areas if you turn on the "generate enclosed areas" based on the current elevation shader. This comes close to what I want to do. However this only creates polgons for each discrete contour, not those for the ranges 1000-2500m regions.
How can I create the polygons for the 1000-2500m region?
Do I need to create a colour shader for the levels I want to create a polygon for?
As I have never written a GM script is there any way to script this as need to create 3 polygon regions for a number of grids of differing value ranges? If If scripting it can be done, how do learn to do this?
thanks
Dino

[global_mapper]

Dino,

Currently the area contour creation is restricted as you describe, but what you could do is first restrict the elevation range of your grid layer by opening the Control Center, selecting the layer, pressing Options, then changing the valid min/max range on the Adjust Elevations tab to what you want (say 1000 - 2500 meters). Then go generate the contours with areas at some large range, so then you'll just get a single area feature covering the entire valid area between 1000m and 2500m. Then repeat for your other elevation ranges and you should get what you need.

Let me know if I can be of further assistance.

Thanks,

Mike
Global Mapper Support
support@globalmapper.com