Updating the Wyoming State Geologic Map - wyogeo.org · To make a hillshade … • Global Mapper...
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Re-creating the Geologic Map of Wyoming Phyllis Ranz and Suzanne Luhr Wyoming State Geological Survey
Transcript of Updating the Wyoming State Geologic Map - wyogeo.org · To make a hillshade … • Global Mapper...
Re-creating theGeologic Map of Wyoming
Phyllis Ranz and Suzanne Luhr
Wyoming State Geological Survey
ca 1890
1925
1955
1985
1877
Central Wyoming
Hayden Survey
1878
YellowstoneGeology
1900
www.RareMaps.com
www.RareMaps.com
Geology Map of Wyoming1985
J. D. Love and Ann Coe Christiansen
Digital Geologic Map of Wyoming1994
Gregory N. Green and Patricia H. Drouillard
NGMDB (National Geologic Mapping Data Base)
• Geologic descriptions updated and completed.
• Used same colors and patterns but made patterns that kept quality when scaled.
• Added new base map.
• Replaced the topographic base with a slope-enhance hillshade.
• Tried to make a more understandable legend.
1985 print 1994 digital
ArcMap patterns Illustrator patternsin ArcMap
Over 4000 labels
Over 7000 faultsand 2500 dikes
More than 200 units,over 17,000 polygons
To make a hillshade…
• Global Mapper software• Elevation data• Polygon boundary of the map area
The next couple of slides are a quick glance at how Global Mapper creates
a Slope-enhanced Hillshade
Need :
Slope-enhancedHillshade
In Global Mapper a DEM of the map area is opened, set to enable hill shading, assigned azimuth, sun angle, and vertical exaggeration, then exported to a geotiff.
In the DEM and thehillshade specific blend modes
and shading options are chosen to produce this…
Slope-enhanced hillshade
Original hillshade Slope-enhancedhillshade
Blend the geology with the slope-enhanced hillshade
Add the overlying line, point and annotation layers
Scan of 1985 print withtopographic base
Digital print with“mashup” or “blended”geology and hillshade
Pikes Peak Lithographing Co.
• Large format offset printing (not digital for these large plates)
• Specialized “lithographic printer”
• Aluminum plates etched for each color
• 4-color processExample of the type
of printing pressused for the map
Phyllis giving orders Suzanne taking orders
LINKS –• Wyoming State Geological Survey
http://www.wsgs.uwyo.edu/
• NGMDB (Natl. Geologic Map Data Base)http://ngmdb.usgs.gov/ngmdb/ngmdb_home.html
• Blue Marble Geographicshttp://www.bluemarblegeo.com
• FGDC (Federal Geographic Data Committee) Pattern Charthttp://ngmdb.usgs.gov/fgdc_gds/geolsymstd/fgdc-geolsym-all.pdf
• Historic Maps of Wyominghttp://alabamamaps.ua.edu/historicalmaps/us_states/wyoming/
