Blurred Sections/Path Profiles

CarrickCon

Hi GM'ers.

When I create a DTM (Elevation Grid in GM speak) from dxf string lines I get a nice clean, crisp surface, but when I section it (Path Profile in GM speak) its rubbish!

I've shown a screengrab of an example waste rock dump below (refer to Full Section). The plan shows nice crisp, regular 24.5 m wide benches every 10 m vertically with a 35 degree outer slope. However when I section it, it blurs out the benches as shown in the profile below.

When I take "half sections" as shown in two screengrabs further down, its a bit better, but still not crisp/sharp at the crest and toe lines. Its strange that cutting a half section would improve the quality???

I've added a screengrab at the bottom that shows the settings I used when creating the elevation grid.

Has anyone else noticed this and do you have a workaround?

Cheers,

/al

Full Section:

Half Section South:

Half Section North:

bmg_mike

I believe this is related to how many samples are used along the path. This is why shorter paths look better.

If you use the Path Setup->Specify Sample Count / Spacing Distance option on the profile menu, you can specify the sample count or spacing to use so you can see more detail.

Thanks,

Mike

Global Mapper Guru

CarrickCon

Thanks Mike, you're a champion!

I didn't realise that I could improve the sampling along the profile line once it had already been cut.

Much appreciated!

Ta,

/al