Solar time vs standard time
This repository contains tools and data to draw an SVG map of the difference between solar time and standard time.
See the discussion at http://blog.poormansmath.net.
init_map.shto download the required data (this comes from Eric Muller and ESRI).
Use inkscape (at least 0.91) to convert the SVG intp a PNG 6000px wide,
A few corrections required because of the staleness of the shapefile data are included in the GIMP file
map.xcf. Just add the PNG as the bottom layer of the XCF and export
Roll and crop the map running
map_helper.html is a static tool that uses Google Maps API to easily
get coordinates for one or more polylines, drawn directly on the map.