Displaying Change Data on a US Topo Map

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

#nacis2015

Transcript

1. + Displaying Change Data on a US Topo Map Andrew Stauffer (astauffer@usgs.gov) Kristin Fishburn Kristina Yamamoto NACIS – October 16, 2015
2. 2 + October 16, 2015 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, …
3. 3 + October 16, 2015 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
4. 4 + October 16, 2015 North American Cartographic Information Society Step 1: Finding change
5. 5 + October 16, 2015 North American Cartographic Information Society Edits in a US Topo Map: Raw change counts
6. 6 + October 16, 2015 North American Cartographic Information Society Step 2: Evaluating relevance of change NMAS bounds “Old” flow path “New” flow path Important Change Not Important Change
7. 7 + October 16, 2015 North American Cartographic Information Society Step 2: Evaluating relevance of change Visible in US Topo Important Change
8. 8 + October 16, 2015 North American Cartographic Information Society Edits in a US Topo Map: Important change counts
9. 9 + October 16, 2015 North American Cartographic Information Society Step 3: Quantifying ‘relevant’ change 1 major feature changes Berger, MO Many minor features change Crutchfield, KY Both images at 1:24,000 scale
10. 10 + October 16, 2015 North American Cartographic Information Society Edits in a US Topo Map: Sufficient Important Change
11. 11 + October 16, 2015 North American Cartographic Information Society Symbolizing change data for internal decision making
12. 12 + October 16, 2015 North American Cartographic Information Society Making sense of what really matters Smithwick NW, SD Valeene, IN
13. 13 + October 16, 2015 North American Cartographic Information Society Questions?