Coast curve missing

[Geograma]

When we make contours from a data model, the 0 meter curve is not generated at coast.

For example, if we make 0 meter curves only, the possible islands appear inside terrain, but the coast line is not generated (I attach an example with this behaviour).

Could you tell me what I'm doing wrong?

Thanks in advance!

[global_mapper]

The contour generation will only generate a contour when the terrain transitions from a higher elevation through a contour interval to a lower elevation. Since your terrain never goes below 0, there is not a 0 contour generated. What you can do is adjust all of your elevation values by some small number (say -0.001) downward so that transition exists, then you'll get your 0 contours. To do so, simply select the grid layer in the Control Center, press Options, then go to the Adjust Elevations tab and provide an offset of -0.001. Then you can generate your contours and get what you are after.

Let me know if I can be of further assistance.

Thanks,

Mike
Global Mapper Support
support@globalmapper.com