It's interesting that google maps have a source for at least shaded
topographic images of Tasmania.
http://maps.google.com/maps?f=q&hl=en&geocode=&time=&date=&ttype=&q=tasmania+australia&ie=UTF8&ll=-42.285437,146.623535&spn=3.787393,6.130371&t=p&z=7&om=1
I suspect the same source would have elevation data that could be
converted into a garmin format. Some Australian mapping agency perhaps.
Anselm Hook wrote:
Can anybody recommend where my friends and I could find or create some
detailed Tasmania topo maps suitable for loading into a handheld
garmin gps and hiking with?
Ideally topo but also including hydrography, roads, towns and
placenames; and accurate enough that it wouldn't put the user at risk
of falling off a cliff or freezing to death in a cul de sac...
Like this:
http://www.memory-map.co.nz/products/tour/AU-Scrn-Grb_TAS-25k-lge.jpg
Except free...?
More than simply a data request ... if this is unavailable perhaps it
behooves us to try and somehow see if it can't be solved as a general
kind of problem.
Here's what I know so far:
As many of you know there is a community of amateur cartography
aficionados in the space of hiking. This group somewhat overlaps with
the more geeky hacker types. Whenever one looks at any new space (
such as say hiking, sailing, diving, humanitarian efforts, environment
) there often seems to be the same pattern replicated wholesale; yet
more map geeks, new acronyms and new lingo, bizarre file formats,
weirdo tools, half-baked solutions, the same data sharing problems and
on and on.
Wading through all of this; and compositing what is out there, my
friend has produced this Garmin Image Map of Tasmania; which is
viewable in cgpsmapper ( although you may have to force it to show
layer 0 for some weird reason ):
http://hook.org/anselm/projects/20071231_Tasmania/tas.img
One of the better sources for data appears to be :
http://garminmapsearch.com/
Which helped me find map data such as for example this Tasmania map:
http://mapcenter2.cgpsmapper.com/getfile.php?type=zip&comp=7165
As well there is a not free collection of data from Garmin; focusing
largely on places that are already so well traveled that one really
questions why maps are needed... but anyway:
http://www8.garmin.com/cartography/mpc/
One annoyance is that the .img format they use is once again yet
another bizarre file format; somewhat difficult to deal with. This
tool lets one deal with it:
http://www.geopainting.com/en/
I can probably get it into QuantumGIS via gdal or the like but haven't
quite puzzled through that yet.
Another possibility would be to generate topo maps from DEM data...
haven't tried that yet.
It seems like it's a kind of dataset that has general utility... so
either it must exist or should be made to exist.
- a
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