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Data Processing Workflow for the National Geographic World Atlas Mobile App Rosemary Wardley Steve Gifford
Data Processing Workflow for the
National Geographic World Atlas Mobile App
Rosemary Wardley
Steve Gifford
Introduction
World Atlas App
Previous versions & Problems
Goals for new app
Data production
Data processing
Conclusions
World Atlas App for iPhone/iPad
Digital & Interactive Atlas
Political basemaps
Flags & Facts
Search Index
Statistical Overlays
Distance Calculator
How it was done before
How it was done before
How it was done before
How it was done before
How it was done before
App Design/UX Flaws
App Design/UX Flaws
App Design/UX Flaws
Goals for World Atlas v.4
Tighter control over the data for editorial purposes Leverage more of our databases
Reduce the amount of custom processing Fit into evolving Editorial/Production workflow App data that is easier to update & replicate Maintain NG brand identity
Add flexibility & reduce size of the App Hybrid Raster & Vector process
Full Workflow
Data Production
Inputs: Standard Carto Datasets
75 Million Zooms 0-‐2
40 Million Zooms 2-‐4
20 Million Zooms 5-‐6
10 Million Zooms 7-‐8
Editorial & Production Steps
GFID match
Flags & Facts
Search Index Creation
GIS Database Steps
Final Product
Raster & Vector Outputs
Background Raster
Full PDF
Symbol Shapefiles
Boundary Shapefiles
Data Processing
Why Vectors?Image Artifacts
Blurry text & symbols
Tile edge discontinuities
Size
Images are big
Vectors are small
Selection Data
Tapping logic simpler
Vector ProcessingSymbols
Points from GIS database
Both visual and selection
Text
Extracted from PDF
Purely visual
Boundaries
Areals from GIS database
Invisible, just for selection
Background Raster
Including
Roads, Rivers
Fills, stipples
Etc (lots of etc)
Excluding
Symbols
Text
Text ExtractionParse the PDF
Need for each character
Location
Rotation
Size
Font
Output to Shapefile
Uploading to MapboxImage basemaps
Low res everything
High res blanks
Vectors
Symbols
Text
Boundaries
Anatomy of a Tile
How did it go?
App is released and working
Text is Sharp
Symbols are Sharp
Data size is way down
Old app: 500MB per layer
New app:75MB per layer
Conclusions: Data Update Process
Conclusions: Software Used
Mapbox Studio
Wrapup & Contact
Rosemary [email protected]
nationalgeographic.com
Steve [email protected]
mousebird.github.io/WhirlyGlobe/
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