Comparing Igage All Topo Maps and Our Competitor's Scans

It is difficult to directly compare the competitor's scans with the Igage All Topo Scans.

The All Topo scans are effectively 250 DPI scans, while our competitor's scans are 112 to 160 DPI scans. The following comparisons highlight the differences between actual screenshots of the Igage All Topo Maps V7 Pro maps and our 'largest competitor'.

All Topo Maps reduced to 48%

Downsampling the Igage screen shot at 48% to match the competitor's image size:
Igage (48%) >
 

Competitor
 

Click [ Igage Raw ] or [ Competitor Raw ] for the full sized images.

Other competitor's:

maptech.com's Mapserver
This link [ maptech mapserver ] should display this same area with Maptech basemaps. Note that the Maptech server has the 1952 edition of the 'Clay Basin' quadrangle, not the latest version. [ see updated maps for more information ]

www.topozone.com no longer has web access.

Igage All Topo Maps at 100%

All Topo Maps at full size (100%) notice how clean the contour lines and text appear:

Competitor zoomed in to (nearly) match (200%) Notice the compression artifacts

The competitor's product can only be zoomed to a few discreet zoom levels so we can't match the full size All Topo image exactly.

All Topo Maps are usable when greatly magnified since they are compressed with loss-less compression. The competitor's lossy compressed maps are nearly worthless when zoomed in. Here are actual screen shots of zoomed in coverage from the two programs:

Igage at 180% (actual screen shot)

Competitor at 400% (actual screen shot)