Map GPS Coordinates - GPS Map Coordinates ... - Global Mapper

Global Mapper User's Manual
The Color Intensity setting controls whether displayed pixels are lightened or darkened before being
displayed. It may be useful to lighten or darken raster overlays in order to see overlaying vector data clearly.
The Translucency setting controls to what degree you can see through the overlay to overlays underneath the
overlay. The default setting of Opaque means that you cannot see through the overlay at all. Settings closer to
Transparent make the overlay increasingly more see-through, allowing you to blend overlapping data.
The Blend Mode setting controls how an overlay is blended with underlying overlays, in addition to the
Translucency setting. These settings allow Photoshop-style filters to be applied to overlays, resulting in often
stunning results. What you get from a particular set of overlays from a particular blend mode setting can often
be hard to predict, so rather than try to understand what is technically happening for each blend mode it's best
to just experiment with different ones until you find one that you like. The Hard Light setting seems to work
well with satellite imagery overlaid on DEMs, but the others can be quite useful as well. For example, the
Apply Color setting is useful for applying color to a grayscale overlay, such as using a low-resolution color
LANDSAT image to colorize a high-resolution grayscale satellite image. The SPOT Natural Color blend
mode combines the color channels in the topmost layer using the common algorithm for generating natural
color imagery from images from the SPOT HRV multi-spectral sensor [Red = B2; Green = ( 3 * B1 + B3 ) / 4;
Blue = ( 3 * B1 - B3 ) / 4]. The Pseudo Natural Color blend mode combines the color channels within a
single image using a common algorithm for generating natural color imagery from CIR imagery. The Color to
Grayscale blend mode converts a color image to grayscale.
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