Polygon drawing

[nilstores]

Is it possible to draw a polygon and add scalar values to the polygon?

[global_mapper]

You can draw a polygon/area with the Digitizer Tool, then when you are done add attributes with whatever values that you need on the edit dialog that appears for the area.

Let me know if I can be of further assistance.

Thanks,

Mike
Global Mapper Support
support@globalmapper.com

[nilstores]

Very nice!
But how can I export the area information?
Basically I try to use global mapper as roughness and contour editor.
My goal is to end up with a terrain file where height and roughness data is on a regular grid:

#nodes nx ny : 1000 1000

ext. xmin xmax : 318000.0 332975.0
ext. ymin ymax : 7180000.0 7194975.0
ext. zmin zmax : 0.0 140.0

HEIGHT :
1
10.000000E+00 11.000000E+00 13.000000E+00 14.000000E+00 .......

.
.
Roughness
0.500000E+00 0.500000E+00 1.000000E+00 1.000000E+00 .......
.
.

Will this be possible in GM?

[global_mapper]

There is not an export format that Global Mapper supports that has both elevation and roughness on a regular grid. You can use the WaSP .map format to get your roughness data out in a standard format, but if you need a grid you'll first have to create an elevation grid from your data. You can do that by right-clicking on the layer in the Control Center and selecting the option to generate an elevation grid. Once you have that, you can export it to a gridded format (like maybe an Arc ASCII Grid as that is similar to what you are after) using the File->Export Raster and Elevation Data menu commands.

If you want the roughness values gridded rather than the elevation, you can change the "elevation" for each feature to come from the roughness value instead of the elevation attribute by selecting the layer in the Control Center, pressing Options, then choosing your roughness attribute as the elevation attribute, then generating a new "elevation" grid from the layer.

Let me know if I can be of further assistance.

Thanks,

Mike
Global Mapper Support
support@globalmapper.com

[nilstores]

Thanks!
I've nearly reach my goal, but is it possible to align the grids, thus starting gridding from the same position both for elevation and for area features?

We may want to integrate GM with our application,
does the GM SDK provide the same functionality to do all these operations?


Nils

[global_mapper]

Nils,

When you do your export you can specify the bounds to export to on the Export Bounds tab. Note that raster exports (i.e. images) use the bounds of the outer edge of the pixels being exported, whereas elevation grid export specify the bounds of the center of the outer ring of samples, so you might have to adjust by half a sample spacing to get identical visual coverage.

Yes, the SDK allows you to perform all of these operations.

Let me know if I can be of further assistance.

Thanks,

Mike
Global Mapper Support
support@globalmapper.com

[nilstores]

Thanks,

It's working nicely!
Now I just need to understand the SDK.....