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General Category => Map Making Support => Topic started by: Perry on June 11, 2008, 07:46:42 PM

Title: Looking for US land cover data
Post by: Perry on June 11, 2008, 07:46:42 PM
I’m looking for United States land cover data (wooded, etc.) in vector format.

National Map Seamless Server
http://seamless.usgs.gov/website/seamless/viewer.htm

National Map Seamless Server has National Atlas land cover data listed but when I’ve tried to download it the only format available appears to be GeoTiff.

I either get “Extracting data…Please wait for the data to be returned”…forever; or I get an error message after clicking the download button.

National Atlas
http://www.nationalatlas.gov/atlasftp.html

National Atlas has the land cover data available by state as a Geotiff with the value of each pixel representing a land cover type.  I’ve been able to download from there, but have not found a way to turn the Geotiff into a vector format file that can be used for Garmin map making.

So I’m looking for either a source of the data already in vector format or a way to convert the Geotiff.

Perry
Title: Re: Looking for US land cover data
Post by: -Oz- on June 15, 2008, 05:03:23 AM
For the seamless server if you get that error clear your cache and then try again.  If it still doesn't work wait a few hours (sometimes it definitely just doesn't work during certain times).

Also, I was having some issues with Firefox 3 and it so I ended up using IE7.

I'm gonna download some land cover and see what I can do to convert it :)
Title: Re: Looking for US land cover data
Post by: -Oz- on June 15, 2008, 09:25:27 AM
Well, you're right.  I have no idea how to convert the tif file into a vector file.  Global Mapper can't do it.
Title: Re: Looking for US land cover data
Post by: John_M on June 30, 2008, 02:48:03 PM
For United States land cover data in vector format look at http://water.usgs.gov/GIS/dsdl/ds240/index.html.