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.
-
Run
init_map.sh
to download the required data (this comes from Eric Muller and ESRI). -
Run
draw.py
to createbase.svg
. -
Use inkscape (at least 0.91) to convert the SVG intp a PNG 6000px wide,
base.png
. -
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 exportmap.png
. -
Roll and crop the map running
finalize_map.sh
.
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.