Displaying Change Data on a US Topo Map

Andrew Stauffer (astauffer@usgs.gov)
Kristin Fishburn
Kristina Yamamoto
NACIS – October 16, 2015

#nacis2015

Transcript

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   Displaying Change Data
   on a US Topo Map
   Andrew Stauffer (astauffer@usgs.gov)
   Kristin Fishburn
   Kristina Yamamoto
   NACIS – October 16, 2015
   

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   North American Cartographic Information Society
   What is change detection?
    Evaluate edit history of The
   National Map vector databases
    Understand when data changes
    Understand where data changes
    Understand how data changes
    Minimize resources associated
   with maintaining derived
   products and services
    US Topo, staged vector
   products, web services, …
   

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   North American Cartographic Information Society
   US Topo Map
   Footprints
   Change Data
   How is change detection performed?
   Step 1: Perform Change Detection
   Step 2: Parse Change to Maps
   Step 3: Evaluate change by
   product requirements
   Maps with
   Change Data Feature Delete
   Feature Insert
   Geometric Shift
   

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   Step 1: Finding change
   

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   Edits in a US Topo Map:
   Raw change counts
   

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   Step 2:
   Evaluating relevance of change
   NMAS bounds
   “Old” flow path
   “New” flow path
   Important Change
   Not Important Change
   

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   Step 2:
   Evaluating relevance of change
   Visible in US Topo
   Important Change
   

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   Edits in a US Topo Map:
   Important change counts
   

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   Step 3:
   Quantifying ‘relevant’ change
   1 major feature changes
   Berger, MO
   Many minor features change
   Crutchfield, KY
   Both images at 1:24,000 scale
   

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    Edits in a US Topo Map:
    Sufficient Important Change
    

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    Symbolizing change data for internal
    decision making
    

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    Making sense of what really matters
    Smithwick NW, SD
    Valeene, IN
    

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    Questions?
    

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