Bitstring <[email hidden]>, from the
wonderful person Fran <[email hidden]> said
Quoted message said:[email hidden] said...
Quoted message said:I've not bought my mapping, I download mine in 2km tiles as I need
them. I store routes I have plotted as vector files and load them as
overlays, printing them to A4 sheets for walking with. I know it is
nowhere near as swish as the commercial products and a bit more time
consuming but it is cheap.
I understood the first and last sentences of the above.
Unfortunately you lost me totally in the middle.
I think they are referring to Oziexplorer or similar, where you can use
any-old-graphics file as a raster background (once you have
geo-referenced it with a couple of known points). Obviously tracks,
waypoints, and anything else you draw (or download from a GPS) are in
different (vector) format, but Ozi can put them on the same screen (and
plot them on the same sheet of paper).
2km tiles (at 1:25k) is what you can get from the OS www.get-a-map.co.uk
site (or streetmap.co.uk, but hey, might as well drink straight from the
source - less adverts there).
It is 'just about legal' for personal use (my reading of the OS T&Cs) ..
just don't publish anything derived therefrom on a popular website or
the OS will be on your case.
----------- tutorial -----------
[vector format: one or more (X,Y) points (Lat,Long or East/North) with
some indication of what is at (or between) them .. road, pub, whatever.
OK, you can also have 3 (or more) points which form the corners of a
polygon .. forest, lake, or similar area feature.
Raster format - picture .. could be a picture of a map, hopefully, could
also be an aerial photo, or could be granny's latest quilt].
Vector->raster conversion .. trivially easy, it's called 'plotting'.
Raster->vector conversion .. impossible in most cases where it would be
useful (like maps) without copious human intervention.
--
GSV Three Minds in a Can
SC recommends the use of Firefox; Get smart, or get assimilated.