Automatic delete overlapping overlay

EricGagne

Hello,

I have some difficulties with overlapping overlays.

A comes from a Garmin IMG converted to .shp
B is a .shp files created from a scan of a printed map in ARCGIS.

My problem is that the lines in the area covered by both overlays aren't aligned. I tried fixing that by shifting one of the overlays but since it comes from a printed map the lignes don't have the exact same shape and I can still see two lines most of the time.

I would like to remove everything from A in the area that is covered by B. Is there a way to that automaticlaly in GM ?

global_mapper

What you can do is right-click on both A and B in the Control Center and select to create bounding rectangle areas from the layers, then select the layer B bounding rectangle with the Digitizer Tool, then right-click and select to subtract it from an area and choose area A. You will then have a crop area from A with a hole for B. Then select that new area, go to the Cropping tab of the Options dialog for layer A, then specify to crop to the area. That should cut out the area of B from A.

Let me know if I can be of further assistance.

Thanks,

Mike
Global Mapper Support
support@globalmapper.com

EricGagne

global_mapper wrote: »

Then select that new area, go to the Cropping tab of the Options dialog for layer A, then specify to crop to the area. That should cut out the area of B from A.
support@globalmapper.com

Mike,

I don't understand what you mean there, I can't find any "crop" feature anywhere. I created my "island" but I'm stuck there.

Eric

EricGagne

Mike I've been searching and I think you're talking about cropping raster data but this is vector data.

global_mapper

Ah sorry you are right, I was thinking A was the raster for some reason. What you need to do for this case is simply make your raster layer B draw on top of the vector layer A and block it out. To do this, make sure layer B is after layer A in the Control Center, then on the Vector Display tab of the Configuration dialog set the 'Vector Layer Order During Draw' option to the 2nd setting so that layer order takes precedence over layer type and you should get what you are after.

Let me know if I can be of further assistance.

Thanks,

Mike
Global Mapper Support
support@globalmapper.com