English: This map depicts the distribution of these karst-related features in the state of Missouri:

• Relative cave density per USGS 7.5" quadrangle is depicted by shades of red, deeper red signifying a larger number of caves in the quadrangle.
• Stretches of losing streams streams are shown in yellow.
• Known springs are shown as filled blue circles. (Note the data does not contain any indication of freshwater vs. mineral or saline springs.)

Layers are rendered from these datasets:

Originator: Missouri Department of Natural Resources (MoDNR),
    Division of Geology and Land Survey (DGLS), Geological Survey
    Program (GSP)
Publication_Date: 20060609
Publication_Time: Unknown
Title: Cave Density

Originator: Missouri Department of Natural Resources (MoDNR),
    Division of Geology and Land Survey (DGLS), Geological Survey
    Program (GSP)
Publication_Date: 20060712
Title: SPRINGS

Originator: Missouri Department of Natural Resources (MoDNR),
    Division of Geology and Land Survey (DGLS)
Originator: Geological Survey Program (GSP), Environmental Geology
    Section (EGS)
Publication_Date: 20070326
Title: LOSING_STREAM

This map is rendered with an Albers equal area projection that is described in "proj" format as:

+proj=aea +lon_0=-92.00 +lat_1=37.5 +lat_2=39.667 +x_0=0 +y_0=0 +ellps=clrk66 +datum=WGS84 +units=m +no_defs

This SVG map was prepared directly from the original shapefile data with the free "shptosvg.pl" utility written in Perl and available at https://www.github.com/kbh3rd/shptosvg. That utility incorporates other free software modules distributed through http://www.cpan.org/. The final touches were performed with Inkscape, another free software product (http://www.inkscape.org/).