Variable Opacity Merges

Select option from Modify menu of  map.
  • Merge two different maps.
  • Put the overlays for map on separate map plane.

This option allows you to interactively merge two compatible maps, varying the opacity of the top image.  The two images must share the same image projection characteristics (UTM or geographic).  Possible data sets include:

To use this option:


Blend Value 255, seeing only the USGS DOQQ.
Blend Value 200
Blend Value 150
Blend Value 100
Blend Value 1, seeing only the USGS DRG

last Modification 6/26/2016