Mars 15M Geologic Map GIS Renovation
- Primary Authors
- James A. Skinner, Jr.
- Originators
- Trent Hare, Ken Tanaka
- Publisher
- USGS Astrogeology Science Center
- Publication Date
- 2006-03-01
- Abstract
- A digital adaptation of the hard-copy Viking Orbiter-based geologic maps of Mars. The western equatorial region was originally mapped by David H. Scott and K. L. Tanaka (USGS I-1802-A, 1986, 1:15M scale). The eastern equatorial region was originally mapped by Ronald Greeley and J. E. Guest (USGS I-1802-B, 1987, 1:15M scale). The north and south polar regions were originally mapped by K. L. Tanaka and D. H. Scott (USGS I-1802-C, 1987, 1:15M scale). A conference abstract submitted to the 37th Lunar and Planetary Science Conference outlines and discusses the rationale and methodology for the digitized version presented herein. The abstract reference is: Skinner, J. A., Jr, T. M. Hare, and K. L. Tanaka 2006, LPSC XXXVII, abstract #2331.
- Purpose
- The digital product presented herein is an adaptation. In support of ongoing scientific analysis and in advance of renewed global geologic mapping efforts, we have digitized the Viking-based Atlas of Mars, 1:15, 000, 000 Geologic Series (AMG) maps (USGS I-1802A-C) originally published in 1986 and 1987.
Contact and Distribution
- Format
- Geologic Map, Vector Data
- Access Constraints
- None
- Access Scope
- MRCTR
- Use Constraints
- None
- Edition
- 1
- Supplemental Information
- http://www.lpi.usra.edu/meetings/lpsc2006/pdf/2331.pdf
- Native Data Set Environment
- ESRI Arcinfo
- Astrogeology Theme
- Geographic Information System (GIS), Geology
- Temporal Keywords
- Amazonian, Hesperian, Noachian
- Mission Names
- Viking Orbiter
- Online Package Link
- https://astrogeology.usgs.gov/search/map/mars_15m_geologic_map_gis_renovation
- External File Size
- 15435129
- Online File Link
- http://astropedia.astrogeology.usgs.gov/download/Mars/Geology/Mars15MGeologicGISRenovation.zip
- Access Instructions
- You will need GIS software to view
- Contact Address
- 2255 N. Gemini Drive
- Contact City
- Flagstaff
- Contact State
- AZ
- Contact Postal Code
- 86001
- Contact Email
- astroweb@usgs.gov
- Currentness Reference
- Publication date
- Progress
- Complete
- Update Frequency
- None planned
- Logical Consistency
- These data are believed to be logically consistent. Line geometry is topologically clean.
- Completeness Report
- The digital lines were drawn at approximately 1:2M scale with a node spacing of approximately 1 km. This digitized linework was intersected and cleaned by hand, using both smoothing algorithms (tolerance = 20 km) and generalizing algorithms (tolerance = 0.250 km). These efforts attempted to balance digital information, accuracy, and map aesthetics.
- Process Description
- The final digital product presented herein was adapted from the scanned linework of the original I-1802 maps. These original scans used outdated Martian geodesy, resulting in inaccurately placed contacts and structures. For the digital product presented herein, we used Viking Orbiter digital image mosaics and the Mars Orbiter Laser Altimeter (MOLA) dataset [Smith et al. 2001] as basemaps to correctly align geologic contacts and structural symbols by hand in ArcGIS.
Lineage
- Process Date
- 2006-03-01
- Source Title
- USGS I-1802 A-C Mars Geologic Maps
- Attribute Accuracy Report
- Accurate to Control Net
- Horizontal Positional Accuracy Report
- Accurate to Control Net
Geospatial Information
- Target
- Mars
- System
- Mars
- Minimum Latitude
- -90
- Maximum Latitude
- 90
- Minimum Longitude
- -180
- Maximum Longitude
- 180
- Direct Spatial Reference Method
- Vector
- Object Type
- Grid Cell
- Point and Vector Object Count
- 2878
- Quad Name
- Radius A
- 3396190
- Radius C
- 3396190
- Control Net
- MOLA
- Map Projection Name
- Simple Cylindrical
- Latitude Type
- Planetocentric
- Longitude Direction
- Positive East
- Longitude Domain
- -180 to 180
