improving access: texas topographic map project · 24-06-2012 · improving access: texas...
TRANSCRIPT
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Improving Access: Texas Topographic Map Project
Mark Phillips
ALA – June 24, 2012
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Overview
• Background
• Goals
• Process
• Challenges
• Next Steps
• Questions
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Background
• UNT Libraries Digital Projects Unit – Infrastructure, workflows, tools, digital
preservation services for UNT
• Portal to Texas History – 200+ Partners around the State of Texas
– 200,000+ Items
– 2,600,000+ Images
– 5,000,000+ Uses in the last three years
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Map Collection Highlights
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Texas Soil Surveys
• Digitized all pre-1950 surveys and maps
• Digitizing all post-1950 surveys and maps,
• 75% complete at this point
• 356 items, 23,893 files with 56,600+ uses in three years
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Texas General Land Office
• Historic County Map Collection
• Popular set of maps from the GLO
• Complete county coverage of Texas
• 926 maps
• 44,330+ uses in two years
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UT Arlington Map Collection
• Mapping the Southwest Grant Project
• NEH Grant PW-50625-10
• Collaboration between UNT and UTA
• Digitization of 5000+ historic maps from the UTA Cartographic Collection
• Provide access via the Portal to Texas History
• 2,153 maps so far
• 25,675+ uses of collection
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USGS Topo Maps
• 7.5 minute 1:24,000 scale (completed 1992)
• 55,000 maps covering 48 states
• Digital Raster Graphic (DRG) editions produced 1995-1998
• Files – Geotiff - .tif – Metadata file - .fgd – World file - .tfw
• 4,281 maps for Texas
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Goals
• Acquire, describe and provide access to a large set of digital map content
• Expose the 7.5 Minute Quadrangles to a different audience
• Investigate methods for automatic metadata creation
• Improve access points to Quadrangle maps.
• Provide “data access” for GIS users and “real world” access for everyone else
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Process
• Locate Maps
• Harvest Maps
• Map existing metadata
• Extract additional metadata based on location
• Create metadata records
• Ingest into repository
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Metadata Lookup
• County lookup for 9 points via Google
• Named place lookup using GeoNames Web- services
• Custom location normalization script
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Usage
• “I was looking at the surveyors map of Liberty County and then the Dayton Quadrangle and found it very interesting. Do you print these maps and if so, what is the size and cost.”
• 19,500+ “uses” in the two years they have been online.
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Challenges
• Confusing metadata related to dates
• County lookup Web-services differ substantially
• What kind and how much automatically extracted metadata
• How do users want to find this content
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2010-2011 Texas Topo Maps
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Project Goals
• Add 4000+ new topographic maps to the Portal to Texas History
• Reuse existing metadata whenever possible
• Automate new metadata creation
• Archive new series of topographic maps
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Process
• Harvest zip files from USGS Store
• Extract GeoPDF files
• Batch convert GeoPDF to high resolution jpegs for display
• Merge new map and metadata with existing metadata from quadrangle
• Ingest maps into system
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Next Steps
• Historic Topographic Maps
• Lesson plans
• Marketing to increase usage
• Other topographic series – 1:100,000
– 1:250,000
• Other States?
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Questions
• http://texashistory.unt.edu/
• Mark Phillips
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