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Omnimap seem to have all 1:50k maps with a delivery time of around two weeks. However, Omnimap are quite expensive (US$ 16.95 per sheet). By comparison, MapWorld New Zealand charges NZ$ 7.90 (US$ 6.50) per map. Land Information New Zealand have a (probably incomplete) list of international resellers. This list includes Omnimap. Probably some of the domestic ...

The USGS Fort Collins Science Center published the following map of the conterminous United States in 2005: It has been published as a factsheet with a PDF (that can be zoomed for more detail): Watts, R.D., R.W. Compton, J.H. McCammon, C.L. Rich, and S.M. Wright. 2005. Distance to the nearest road in the conterminous United States: U.S. Geological Survey ...

That's actually a very difficult question to answer, since there's a lot of ambiguity about what's a "road," etc. Some geographers in Alaska tried to tackle a similar question here, in an Alaska Dispatch article.

I'm a kiwi too (a director of Hiking New Zealand.com) We do remote guided small group trips around NZ . Some of us are starting to play around with digital map solutions. A Good one I found is BackCountryNavigator PRO, cost a few bucks but is excellent. can download maps for when you are out of Internet range and your GPS works on it. Don't use Google maps ...

Below are some resources for US vector data. The links do provide gdb format downloads that will drop into a garmin for example. The format that you are looking for is a shapefile though. Those are the most standardized format for vector data sets but are very clumsy to work with. http://fsgeodata.fs.fed.us/vector/index.php ...

From personal experience, I would say that maps made by an organization that focuses on the area in question are the most accurate. For instance, here in the Easter USA, I wouldn't head out on the Appalachian Trail without a map from the ATC or into the Adirondak Mountains without a map from the ADK. Maps by an organization like this are typically updated ...

I don't know of a site that lists all trails in the US. This is probably because trails are managed by the same patchwork of authority that manages the land. There are various federal, state, regional, town, and private groups that manage land that contains trails open to the public. The best I can advise is to pick a small area you are interested in and ...

The data from the old wind forecasts probably came from NOAA, and it's available here. The raw data is in the form of GRIB files. You can do a search for "GRIB Viewer" and find some apps that will work. You can also search for "GRIB KML", and might be able to download grib files in a KML/KMZ format that can be shown on Google Earth or Google Maps.

Palomar do a few US cities in their Crumpled City range - San Francisco, New York and Chicago. The Find do a range of Trail and National Park maps in Tyvek (scroll down on this page to find them)

Quick tips: Go to http://www.i-needtoknow.com/milford/maps/index.html They have several links for hikers, including maps. One you might check out is the Department of Conservation's online maps at: http://www.doc.govt.nz/parks-and-recreation/tracks-and-walks/ Also, Google says there's another site called www.kiwifootpaths.com that may be useful...