Raster output quality to improve.

[hugolpz]

Strangely, running @wikiatlas in 2015 generated #svg images of smaller dimensions yet higher quality🙄 For topography&hillshade.🤔 To dig in!🤣

• [x] hillshade
• [ ] topography

[hugolpz]

• [x] Hillshade - due to -blur in ./d3/d3.makefile module.

Command & Result
convert ../output/$(NAME)/trans.gis.tif ../output/$(NAME)/trans.png
convert ../output/$(NAME)/trans.gis.tif -blur 1x1 ../output/$(NAME)/trans.png
convert ../output/$(NAME)/trans.gis.tif -blur 3x3 ../output/$(NAME)/trans.png

[hugolpz]

• [ ] Topographic

• Regression likely due to topojson's simplification settings changes.
• Balancing GIS raster precision with Topojson simplification is known to be tricky ! :roll_eyes:
• Strange, history from 2015.05.15 (3 changes) doesn't give anything meaningful. Did the raster data (ETOPO1) changed ? Or topojson simplification's algorithm ?
• Crispy edges with topojson? Quantization and Simplification
• Passing --simplification-proportion 0.25 to 0.5 improves the visual quality, lightly increase the filesize from 5 to 7.5MB, but radically slows down the whole script, with printing moving from 1 to 30secs !
• See also simplification. May be good to move to --simplify, but needs automatic calculation of the value.